Document and Entity Information - USD ($)	12 Months Ended
Document and Entity Information - USD ($)	Dec. 31, 2015	Jan. 31, 2016	Jun. 30, 2015
Entity Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	FY
Trading Symbol	UA
Entity Registrant Name	Under Armour, Inc.
Entity Central Index Key	0001336917
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 15,034,547,119
Class A Common Stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		181,646,468
Class B Convertible Common Stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		34,450,000

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Assets
Cash and cash equivalents	$ 129,852	$ 593,175
Accounts receivable, net	433,638	279,835
Inventories	783,031	536,714
Prepaid expenses and other current assets	152,242	87,177
Deferred income taxes	0	52,498
Total current assets	1,498,763	1,549,399
Property and equipment, net	538,531	305,564
Goodwill	585,181	123,256
Intangible assets, net	75,686	26,230
Deferred income taxes	92,157	33,570
Other long term assets	78,582	57,064
Total assets	2,868,900	2,095,083
Liabilities and Stockholders’ Equity
Accounts payable	200,460	210,432
Accrued expenses	192,935	147,681
Current maturities of long term debt	42,000	28,951
Other current liabilities	43,415	34,563
Total current liabilities	478,810	421,627
Long term debt, net of current maturities	352,000	255,250
Long-term Line of Credit, Noncurrent	275,000	0
Other long term liabilities	94,868	67,906
Total liabilities	$ 1,200,678	$ 744,783
Commitments and contingencies (see Note 7)
Stockholders’ equity
Additional paid-in capital	$ 636,630	$ 508,350
Retained earnings	1,076,533	856,687
Accumulated other comprehensive loss	(45,013)	(14,808)
Total stockholders’ equity	1,668,222	1,350,300
Total liabilities and stockholders’ equity	2,868,900	2,095,083
Class A Common Stock
Stockholders’ equity
Common Stock, Value, Issued	61	59
Total stockholders’ equity	61	59
Class B Convertible Common Stock
Stockholders’ equity
Common Stock, Value, Issued	11	12
Total stockholders’ equity	11	12
Common Class C [Member]
Stockholders’ equity
Common Stock, Value, Issued	$ 0	$ 0

Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2015	Dec. 31, 2014
Class A Common Stock
Par value per share	$ 0.0003	$ 0.0003
Shares authorized	400,000,000	400,000,000
Shares issued	181,646,468	177,295,988
Shares outstanding	181,646,468	177,295,988
Class B Convertible Common Stock
Par value per share	$ 0.0003	$ 0.0003
Shares authorized	34,450,000	36,600,000
Shares issued	34,450,000	36,600,000
Shares outstanding	34,450,000	36,600,000
Common Class C [Member]
Par value per share	$ 0.0003	$ 0
Shares authorized	400,000,000	0
Shares issued	0	0
Shares outstanding	0	0

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Statement [Abstract]
Net revenues	$ 3,963,313	$ 3,084,370	$ 2,332,051
Cost of goods sold	2,057,766	1,572,164	1,195,381
Gross profit	1,905,547	1,512,206	1,136,670
Selling, general and administrative expenses	1,497,000	1,158,251	871,572
Income from operations	408,547	353,955	265,098
Interest expense, net	(14,628)	(5,335)	(2,933)
Other expense, net	(7,234)	(6,410)	(1,172)
Income before income taxes	386,685	342,210	260,993
Provision for income taxes	154,112	134,168	98,663
Net income	$ 232,573	$ 208,042	$ 162,330
Net income available per common share
Basic (USD Per Share)	$ 1.08	$ 0.98	$ 0.77
Diluted (USD Per Share)	$ 1.05	$ 0.95	$ 0.75
Weighted average common shares outstanding
Basic (In Shares)	215,498	213,227	210,696
Diluted (In Shares)	220,868	219,380	215,958

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 232,573	$ 208,042	$ 162,330
Other comprehensive income (loss):
Foreign currency translation adjustment	(31,816)	(16,743)	(897)
Unrealized gain (loss) on cash flow hedge, net of tax of $415, $(408) and $505 for the years ended December 31, 2015, 2014 and 2013.	1,611	(259)	723
Total other comprehensive loss	(30,205)	(17,002)	(174)
Comprehensive income	$ 202,368	$ 191,040	$ 162,156

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References + Details

Consolidated Statements Of Stockholders' Equity And Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	Total	Class A Common Stock	Class B Convertible Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning balance (shares) at Dec. 31, 2012		166,922	42,600
Beginning balance at Dec. 31, 2012	$ 816,922	$ 56	$ 14	$ 321,303	$ 493,181	$ 2,368
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (shares)	1,822	1,822
Exercise of stock options	$ 12,159	$ 0		12,159
Shares withheld in consideration of employee tax obligations relative to stock-based compensation arrangements (shares)		(47)
Shares withheld in consideration of employee tax obligations relative to stock-based compensation arrangements	(1,669)				(1,669)
Issuance of Class A Common Stock, net of forfeitures (shares)		332
Issuance of Class A Common Stock, net of forfeitures	3,439			3,439
Class B Convertible Common Stock converted to Class A Common Stock (shares)		(2,600)	(2,600)
Class B Convertible Common Stock converted to Class A Common Stock	0	$ (1)	$ (1)
Stock-based compensation expense	43,184			43,184
Net excess tax benefits from stock-based compensation arrangements	17,163			17,163
Comprehensive income	162,156				162,330	(174)
Ending balance (shares) at Dec. 31, 2013		171,629	40,000
Ending balance at Dec. 31, 2013	$ 1,053,354	$ 57	$ 13	397,248	653,842	2,194
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (shares)	1,454	1,454
Exercise of stock options	$ 11,259	$ 1		11,258
Shares withheld in consideration of employee tax obligations relative to stock-based compensation arrangements (shares)		(95)
Shares withheld in consideration of employee tax obligations relative to stock-based compensation arrangements	(5,197)				(5,197)
Issuance of Class A Common Stock, net of forfeitures (shares)		908
Issuance of Class A Common Stock, net of forfeitures	12,067			12,067
Class B Convertible Common Stock converted to Class A Common Stock (shares)		(3,400)	(3,400)
Class B Convertible Common Stock converted to Class A Common Stock	0	$ (1)	$ (1)
Stock-based compensation expense	50,812			50,812
Net excess tax benefits from stock-based compensation arrangements	36,965			36,965
Comprehensive income	191,040				208,042	(17,002)
Ending balance (shares) at Dec. 31, 2014		177,296	36,600
Ending balance at Dec. 31, 2014	$ 1,350,300	$ 59	$ 12	508,350	856,687	(14,808)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (shares)	360	360
Exercise of stock options	$ 2,852	$ 0		2,852
Shares withheld in consideration of employee tax obligations relative to stock-based compensation arrangements (shares)		(172)
Shares withheld in consideration of employee tax obligations relative to stock-based compensation arrangements	(12,727)				(12,727)
Issuance of Class A Common Stock, net of forfeitures (shares)		1,996
Stock Issued During Period, Shares, New Issues		$ 1
Issuance of Class A Common Stock, net of forfeitures	19,136			19,135
Class B Convertible Common Stock converted to Class A Common Stock (shares)		(2,150)	(2,150)
Class B Convertible Common Stock converted to Class A Common Stock	0	$ (1)	$ (1)
Stock-based compensation expense	60,376			60,376
Net excess tax benefits from stock-based compensation arrangements	45,917			45,917
Comprehensive income	202,368				232,573	(30,205)
Ending balance (shares) at Dec. 31, 2015		181,630	34,450
Ending balance at Dec. 31, 2015	$ 1,668,222	$ 61	$ 11	$ 636,630	$ 1,076,533	$ (45,013)

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities
Net income	$ 232,573	$ 208,042	$ 162,330
Adjustments to reconcile net income to net cash used in operating activities
Depreciation and amortization	100,940	72,093	50,549
Unrealized foreign currency exchange rate losses	33,359	11,739	1,905
Loss on disposal of property and equipment	549	261	332
Stock-based compensation	60,376	50,812	43,184
Deferred income taxes	(4,426)	(17,584)	(18,832)
Changes in reserves and allowances	40,391	31,350	13,945
Changes in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable	(191,876)	(101,057)	(35,960)
Inventories	(278,524)	(84,658)	(156,900)
Prepaid expenses and other assets	(76,476)	(33,345)	(19,049)
Accounts payable	(22,583)	49,137	14,642
Accrued expenses and other liabilities	64,126	28,856	56,481
Income taxes payable and receivable	(2,533)	3,387	7,443
Net cash provided by (used in) operating activities	(44,104)	219,033	120,070
Cash flows from investing activities
Purchases of property and equipment	(298,928)	(140,528)	(87,830)
Purchase of businesses, net of cash acquired	(539,460)	(10,924)	(148,097)
Payments to Acquire Available-for-sale Securities	(103,144)	0	0
Proceeds from Sale of Available-for-sale Securities, Equity	96,610	0	0
Purchases of other assets	(2,553)	(860)	(475)
Change in loans receivable	0	0	(1,700)
Net cash used in investing activities	(847,475)	(152,312)	(238,102)
Cash flows from financing activities
Proceeds from revolving credit facility	500,000	0	100,000
Payments on revolving credit facility	225,000	100,000	0
Proceeds from term loan	150,000	250,000	0
Payments on term loan	(36,250)	(13,750)	0
Payments on long term debt	(3,952)	(4,972)	(5,471)
Excess tax benefits from stock-based compensation arrangements	45,917	36,965	17,163
Proceeds from exercise of stock options and other stock issuances	10,310	15,776	15,103
Payments of debt financing costs	(947)	(1,713)	0
Net cash provided by financing activities	440,078	182,306	126,795
Effect of exchange rate changes on cash and cash equivalents	(11,822)	(3,341)	(3,115)
Net increase (decrease) in cash and cash equivalents	(463,323)	245,686	5,648
Cash and cash equivalents
Beginning of period	593,175	347,489	341,841
End of period	129,852	593,175	347,489
Increase in accrual for property and equipment	17,758	4,922	3,786
Noncash or Part Noncash Acquisition, Value of Assets Acquired	0	11,233	0
Noncash or Part Noncash Acquisition, Fixed Assets Acquired Under Build-to-Suit Leases	5,631	0	0
Cash paid for income taxes	99,708	103,284	85,570
Cash paid for interest, net of capitalized interest	$ 11,176	$ 4,146	$ 1,505

Summary of Significant Accounting Policies	12 Months Ended
Summary of Significant Accounting Policies	Dec. 31, 2015
Text Block [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Basis of Presentation The accompanying consolidated financial statements include the accounts of Under Armour, Inc. and its wholly owned subsidiaries (the “Company”). All intercompany balances and transactions have been eliminated. The accompanying consolidated financial statements were prepared in accordance with accounting principles generally accepted in the United States of America. On March 17, 2014, the Board of Directors declared a two-for-one stock split of the Company's Class A and Class B common stock, which was effected in the form of a 100% common stock dividend distributed on April 14, 2014. Stockholders' equity and all references to share and per share amounts in the accompanying consolidated financial statements have been retroactively adjusted to reflect the two-for-one stock split for all periods presented. On January 5, 2015, the Company acquired 100% of the outstanding equity of Endomondo ApS (“Endomondo”), a Denmark-based digital connected fitness company. On March 17, 2015, the Company acquired 100% of the outstanding equity of MyFitnessPal, Inc. (“MFP”), a digital nutrition and connected fitness company. Both companies were acquired to expand the Under Armour Connected Fitness community. The purchase price allocation for each acquisition is reflected in the consolidated balance sheet as of December 31, 2015. The Company identified a prior period error in the classification of available-for-sale securities (“AFS”) for the first and second quarters of 2015. The Company concluded that the error was not material to any of its previously issued financial statements. The Company included purchases and sales of AFS for the first six months of 2015 of $41.5 million and $19.4 million, respectively, in its cash flows from investing activities for the six months ended June 30, 2015. Additionally, the Company intends to revise the affected periods when they are presented on a comparable basis to reflect the correct accounting. The revision will result in a reclassification from "Cash and cash equivalents" to "Prepaid expenses and other current assets" on the 2015 first and second quarter balance sheets of $7.1 million and $22.1 million, respectively. Correspondingly, the revision will result in the presentation of purchases and sales of AFS for the three months ended March 31, 2015 of $10.4 million and $3.3 million,respectively, in addition to the six months 2015 cash flow activities described above. Cash and Cash Equivalents The Company considers all highly liquid investments with an original maturity of three months or less at date of inception to be cash and cash equivalents. Included in interest expense, net for the years ended December 31, 2015, 2014 and 2013 was interest income of $164.0 thousand, $192.0 thousand and $23.7 thousand, respectively, related to cash and cash equivalents. Concentration of Credit Risk Financial instruments that subject the Company to significant concentration of credit risk consist primarily of accounts receivable. The majority of the Company’s accounts receivable is due from large sporting goods retailers. Credit is extended based on an evaluation of the customer’s financial condition and collateral is not required. The Company's largest customer in North America accounted for 18.7% and 23.4% of accounts receivable as of December 31, 2015 and December 31, 2014, respectively. The Company's largest customer accounted for 11.5%, 14.4% and 16.6% of net revenues for the years ended December 31, 2015, 2014 and 2013, respectively. Allowance for Doubtful Accounts The Company makes ongoing estimates relating to the collectability of accounts receivable and maintains an allowance for estimated losses resulting from the inability of its customers to make required payments. In determining the amount of the reserve, the Company considers historical levels of credit losses and significant economic developments within the retail environment that could impact the ability of its customers to pay outstanding balances and makes judgments about the creditworthiness of significant customers based on ongoing credit evaluations. Because the Company cannot predict future changes in the financial stability of its customers, actual future losses from uncollectible accounts may differ from estimates. If the financial condition of customers were to deteriorate, resulting in their inability to make payments, a larger reserve might be required. In the event the Company determines a smaller or larger reserve is appropriate, it would record a benefit or charge to selling, general and administrative expense in the period in which such a determination was made. As of December 31, 2015 and 2014, the allowance for doubtful accounts was $5.9 million and $3.7 million, respectively. Subsequent to December 31, 2015, the Company became aware of the deteriorating financial condition of one of its wholesale customers, The Sports Authority. The Company's recorded reserve as of year-end materially reflects its best estimate, based on currently available information, of the ultimate recoverability of amounts due from this customer at December 31, 2015. As of December 31, 2015, the amount of this receivable totaled $32.5 million. However, the Company does not currently believe that the exposure to its receivables as of December 31, 2015 is materially impacted by the developments related to The Sports Authority. If the financial condition of this customer continues to deteriorate, this could result in the Company recording additional reserves against the Company's receivables balance. Inventories Inventories consist primarily of finished goods. Costs of finished goods inventories include all costs incurred to bring inventory to its current condition, including inbound freight, duties and other costs. The Company values it using the first-in, first-out method of cost determination. Market value is estimated based upon assumptions made about future demand and retail market conditions. If the Company determines that the estimated market value of its inventory is less than the carrying value of such inventory, it records a charge to cost of goods sold to reflect the lower of cost or market. If actual market conditions are less favorable than those projected by the Company, further adjustments may be required that would increase the cost of goods sold in the period in which such a determination was made. Income Taxes Income taxes are accounted for under the asset and liability method. Deferred income tax assets and liabilities are established for temporary differences between the financial reporting basis and the tax basis of the Company’s assets and liabilities at tax rates expected to be in effect when such assets or liabilities are realized or settled. Deferred income tax assets are reduced by valuation allowances when necessary. Assessing whether deferred tax assets are realizable requires significant judgment. The Company considers all available positive and negative evidence, including historical operating performance and expectations of future operating performance. The ultimate realization of deferred tax assets is often dependent upon future taxable income and therefore can be uncertain. To the extent the Company believes it is more likely than not that all or some portion of the asset will not be realized, valuation allowances are established against the Company’s deferred tax assets, which increase income tax expense in the period when such a determination is made. Income taxes include the largest amount of tax benefit for an uncertain tax position that is more likely than not to be sustained upon audit based on the technical merits of the tax position. Settlements with tax authorities, the expiration of statutes of limitations for particular tax positions, or obtaining new information on particular tax positions may cause a change to the effective tax rate. The Company recognizes accrued interest and penalties related to unrecognized tax benefits in the provision for income taxes on the consolidated statements of income. Property and Equipment Property and equipment are stated at cost, including the cost of internal labor for software customized for internal use, less accumulated depreciation and amortization. Property and equipment is depreciated using the straight-line method over the estimated useful lives of the assets: 3 to 10 years for furniture, office equipment, software and plant equipment and 10 to 35 years for site improvements, buildings and building equipment. Leasehold and tenant improvements are amortized over the shorter of the lease term or the estimated useful lives of the assets. The cost of in-store apparel and footwear fixtures and displays are capitalized, included in furniture, fixtures and displays, and depreciated over 3 years. The Company periodically reviews assets’ estimated useful lives based upon actual experience and expected future utilization. A change in useful life is treated as a change in accounting estimate and is applied prospectively. The Company capitalizes the cost of interest for long term property and equipment projects based on the Company’s weighted average borrowing rates in place while the projects are in progress. Capitalized interest was $1.0 million and $0.4 million as of December 31, 2015 and 2014, respectively. Upon retirement or disposition of property and equipment, the cost and accumulated depreciation are removed from the accounts and any resulting gain or loss is reflected in selling, general and administrative expenses for that period. Major additions and betterments are capitalized to the asset accounts while maintenance and repairs, which do not improve or extend the lives of assets, are expensed as incurred. Goodwill, Intangible Assets and Long-Lived Assets Goodwill and intangible assets are recorded at their estimated fair values at the date of acquisition and are allocated to the reporting units that are expected to receive the related benefits. Goodwill and indefinite lived intangible assets are not amortized and are required to be tested for impairment at least annually or sooner whenever events or changes in circumstances indicate that the assets may be impaired. In conducting an annual impairment test, the Company first reviews qualitative factors to determine whether it is more likely than not that the fair value of the reporting unit is less than its carrying amount. If factors indicate that is the case, or if goodwill is allocated to a reporting unit for the first time, the Company performs the two-step goodwill impairment test. The first step, identifying a potential impairment, compares the fair value of the reporting unit with its carrying amount. We calculate fair value using the discounted cash flows model, which indicates the fair value of the reporting unit based on the present value of the cash flows that we expect the reporting unit to generate in the future. Our significant estimates in the discounted cash flows model include: our weighted average cost of capital, long-term rate of growth and profitability of the reporting unit’s business, and working capital effects. If the carrying amount exceeds its fair value, the second step will be performed. The second step, measuring the impairment loss, compares the implied fair value of the goodwill with the carrying amount of the goodwill. Any excess of the goodwill carrying amount over the applied fair value is recognized as an impairment loss, and the carrying value of goodwill is written down to fair value.The Company performs its annual impairment tests in the fourth quarter of each fiscal year. As of December 31, 2015, no impairment of goodwill was identified, and no reporting unit was at risk of failing step one of the impairment test. The Company continually evaluates whether events and circumstances have occurred that indicate the remaining estimated useful life of long-lived assets may warrant revision or that the remaining balance may not be recoverable. These factors may include a significant deterioration of operating results, changes in business plans, or changes in anticipated cash flows. When factors indicate that an asset should be evaluated for possible impairment, the Company reviews long-lived assets to assess recoverability from future operations using undiscounted cash flows. If future undiscounted cash flows are less than the carrying value, an impairment is recognized in earnings to the extent that the carrying value exceeds fair value. Accrued Expenses At December 31, 2015, accrued expenses primarily included $63.8 million and $17.8 million of accrued compensation and benefits and marketing expenses, respectively. At December 31, 2014, accrued expenses primarily included $61.4 million and $14.0 million of accrued compensation and benefits and marketing expenses, respectively. Foreign Currency Translation and Transactions The functional currency for each of the Company’s wholly owned foreign subsidiaries is generally the applicable local currency. The translation of foreign currencies into U.S. dollars is performed for assets and liabilities using current foreign currency exchange rates in effect at the balance sheet date and for revenue and expense accounts using average foreign currency exchange rates during the period. Capital accounts are translated at historical foreign currency exchange rates. Translation gains and losses are included in stockholders’ equity as a component of accumulated other comprehensive income. Adjustments that arise from foreign currency exchange rate changes on transactions, primarily driven by intercompany transactions, denominated in a currency other than the functional currency are included in other expense, net on the consolidated statements of income. Derivatives and Hedging Activities The Company uses derivative financial instruments in the form of foreign currency forward and interest rate swap contracts to minimize the risk associated with foreign currency exchange rate and interest rate fluctuations. The Company accounts for derivative financial instruments pursuant to applicable accounting guidance. This guidance establishes accounting and reporting standards for derivative financial instruments and requires all derivatives to be recognized as either assets or liabilities on the balance sheet and to be measured at fair value. Unrealized derivative gain positions are recorded as other current assets or other long term assets, and unrealized derivative loss positions are recorded as accrued expenses or other long term liabilities, depending on the derivative financial instrument’s maturity date. Currently, the majority of the Company’s foreign currency forward contracts are not designated as cash flow hedges, and accordingly, changes in their fair value are included in other expense, net on the consolidated statements of income. During 2014, the Company began entering into foreign currency forward contracts designated as cash flow hedges, and consequently, changes in fair value, excluding any ineffective portion, are recorded in other comprehensive income until net income is affected by the variability in cash flows of the hedged transaction. The effective portion is generally released to net income after the maturity of the related derivative and is classified in the same manner as the underlying exposure. Additionally, the Company has designated its interest rate swap contract as a cash flow hedge and accordingly, the effective portion of changes in fair value are recorded in other comprehensive income and reclassified into interest expense over the life of the underlying debt obligation. The ineffective portion, if any, is recognized in current period earnings. The Company does not enter into derivative financial instruments for speculative or trading purposes. Revenue Recognition The Company recognizes revenue pursuant to applicable accounting standards. Net revenues consist of both net sales and license and other revenues. Net sales are recognized upon transfer of ownership, including passage of title to the customer and transfer of risk of loss related to those goods. Transfer of title and risk of loss is based upon shipment under free on board shipping point for most goods or upon receipt by the customer depending on the country of the sale and the agreement with the customer. In some instances, transfer of title and risk of loss takes place at the point of sale, for example, at the Company’s brand and factory house stores. The Company may also ship product directly from its supplier to the customer and recognize revenue when the product is delivered to and accepted by the customer. License and other revenues are primarily recognized based upon shipment of licensed products sold by the Company’s licensees. Sales taxes imposed on the Company’s revenues from product sales are presented on a net basis on the consolidated statements of income and therefore do not impact net revenues or costs of goods sold. The Company records reductions to revenue for estimated customer returns, allowances, markdowns and discounts. The Company bases its estimates on historical rates of customer returns and allowances as well as the specific identification of outstanding returns, markdowns and allowances that have not yet been received by the Company. The actual amount of customer returns and allowances, which is inherently uncertain, may differ from the Company’s estimates. If the Company determines that actual or expected returns or allowances are significantly higher or lower than the reserves it established, it would record a reduction or increase, as appropriate, to net sales in the period in which it makes such a determination. Provisions for customer specific discounts are based on contractual obligations with certain major customers. Reserves for returns, allowances, markdowns and discounts are recorded as an offset to accounts receivable as settlements are made through offsets to outstanding customer invoices. As of December 31, 2015 and 2014, there were $94.5 million and $68.9 million, respectively, in reserves for customer returns, allowances, markdowns and discounts. Advertising Costs Advertising costs are charged to selling, general and administrative expenses. Advertising production costs are expensed the first time an advertisement related to such production costs is run. Media (television, print and radio) placement costs are expensed in the month during which the advertisement appears, and costs related to event sponsorships are expensed when the event occurs. In addition, advertising costs include sponsorship expenses. Accounting for sponsorship payments is based upon specific contract provisions and the payments are generally expensed uniformly over the term of the contract after recording expense related to specific performance incentives once they are deemed probable. Advertising expense, including amortization of in-store marketing fixtures and displays, was $417.8 million, $333.0 million and $246.5 million for the years ended December 31, 2015, 2014 and 2013, respectively. At December 31, 2015 and 2014, prepaid advertising costs were $37.5 million and $31.1 million, respectively. Shipping and Handling Costs The Company charges certain customers shipping and handling fees. These fees are recorded in net revenues. The Company includes the majority of outbound handling costs as a component of selling, general and administrative expenses. Outbound handling costs include costs associated with preparing goods to ship to customers and certain costs to operate the Company’s distribution facilities. These costs, included within selling, general and administrative expenses, were $63.7 million, $55.3 million and $46.1 million for the years ended December 31, 2015, 2014 and 2013, respectively. The Company includes outbound freight costs associated with shipping goods to customers as a component of cost of goods sold. Minority Investment The Company holds a minority investment in Dome Corporation (“Dome”), the Company’s Japanese licensee. The Company invested ¥1,140.0 million, or $15.5 million, in exchange for 19.5% common stock ownership in Dome. As of December 31, 2015 and 2014, the carrying value of the Company’s investment was $12.0 million and $13.4 million, respectively, and was included in other long term assets on the consolidated balance sheets. The investment is subject to foreign currency translation rate fluctuations as it is held by the Company’s European subsidiary. The Company accounts for its investment in Dome under the cost method given that it does not have the ability to exercise significant influence. Additionally, the Company concluded that no event or change in circumstances occurred during the year ended December 31, 2015 that may have a significant adverse effect on the fair value of the investment. Earnings per Share Basic earnings per common share is computed by dividing net income available to common stockholders for the period by the weighted average number of common shares outstanding during the period. Any stock-based compensation awards that are determined to be participating securities, which are stock-based compensation awards that entitle the holders to receive dividends prior to vesting, are included in the calculation of basic earnings per share using the two class method. Diluted earnings per common share is computed by dividing net income available to common stockholders for the period by the diluted weighted average common shares outstanding during the period. Diluted earnings per share reflects the potential dilution from common shares issuable through stock options, warrants, restricted stock units and other equity awards. Refer to Note 11 for further discussion of earnings per share. Stock-Based Compensation The Company accounts for stock-based compensation in accordance with accounting guidance that requires all stock-based compensation awards granted to employees and directors to be measured at fair value and recognized as an expense in the financial statements. In addition, this guidance requires that excess tax benefits related to stock-based compensation awards be reflected as financing cash flows. The Company uses the Black-Scholes option-pricing model to estimate the fair market value of stock-based compensation awards. The Company uses the “simplified method” to estimate the expected life of options, as permitted by accounting guidance. The “simplified method” calculates the expected life of a stock option equal to the time from grant to the midpoint between the vesting date and contractual term, taking into account all vesting tranches. The risk free interest rate is based on the yield for the U.S. Treasury bill with a maturity equal to the expected life of the stock option. Expected volatility is based on the Company's historical average. Compensation expense is recognized net of forfeitures on a straight-line basis over the total vesting period, which is the implied requisite service period. Compensation expense for performance-based awards is recorded over the implied requisite service period when achievement of the performance target is deemed probable. The forfeiture rate is estimated at the date of grant based on historical rates. The Company issues new shares of Class A Common Stock upon exercise of stock options, grant of restricted stock or share unit conversion. Refer to Note 12 for further details on stock-based compensation. Management Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates. Fair Value of Financial Instruments The carrying amounts shown for the Company’s cash and cash equivalents, accounts receivable and accounts payable approximate fair value because of the short term maturity of those instruments. The fair value of the long term debt approximates its carrying value based on the variable nature of interest rates and current market rates available to the Company. The fair value of foreign currency forward contracts is based on the net difference between the U.S. dollars to be received or paid at the contracts’ settlement date and the U.S. dollar value of the foreign currency to be sold or purchased at the current forward exchange rate. The fair value of the interest rate swap contract is based on the net difference between the fixed interest to be paid and variable interest to be received over the term of the contract based on current market rates. Recently Issued Accounting Standards In May 2014, the FASB issued an Accounting Standards Update which supersedes the most current requirements. The new revenue recognition standard requires entities to recognize revenue in a way that depicts the transfer of goods or services to customers in an amount that reflects the consideration which the entity expects to be entitled to in exchange for those goods or services. This guidance was previously effective for annual and interim reporting periods beginning after December 15, 2016, with early adoption not permitted. In August 2015, the FASB issued a one-year deferral of the effective date of the new revenue recognition standard. The new standard will now be effective for annual and interim periods beginning after December 15, 2017 with early adoption as of the original effective date permitted. The Company is currently evaluating this standard to determine the impact of its adoption on the consolidated financial statements. In July 2015, the FASB issued an Accounting Standard Update which simplifies the measurement of inventory by requiring certain inventory to be measured at the lower of cost or net realizable value. This guidance is effective for fiscal years beginning after December 15, 2016 and for interim periods therein. The Company does not expect the adoption of this standard to have a significant impact on the consolidated financial statements. In September 2015, the FASB issued an Accounting Standards Update which requires the acquiring company in a business combination to recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. The amendments in this Update require that the acquiring company record, in the same period’s financial statements, the effect on earnings of changes in depreciation, amortization, or other income effects, if any, as a result of a change to the provisional amounts, calculated as if the accounting had been completed at the acquisition date. This guidance is effective for fiscal years beginning after December 15, 2015 and for interim periods therein. The Company does not expect the adoption of this standard to have a significant impact on the consolidated financial statements. Recently Adopted Accounting Standards In January 2015, the FASB issued an Accounting Standards Update which eliminates from GAAP the concept of extraordinary items and the need to separately classify, present, and disclose extraordinary events and transactions. This guidance is effective for annual and interim reporting periods beginning after December 15, 2015, with early adoption permitted provided that the guidance is applied from the beginning of the fiscal year of adoption. The adoption of this pronouncement did not have a material impact on the consolidated financial statements. In November 2015, the FASB issued an Accounting Standards Update which requires deferred tax liabilities and assets to be classified as non-current in a classified statement of financial position. The guidance is effective for financial statements issued for annual periods beginning after December 15, 2017, and interim periods within annual periods beginning after December 15, 2018. Earlier adoption is permitted for all entities as of the beginning of an interim or annual reporting period. This amendment may be applied either prospectively or retrospectively to all periods presented. The Company adopted the provisions of this guidance prospectively in the fourth quarter of 2015, and did not retrospectively adjust the prior periods. Had the Company adopted this guidance retrospectively, $33.5 million would have been reclassified from deferred income taxes-current to deferred income taxes-long term for the year ended December 31, 2014. The adoption of this guidance will simplify the presentation of deferred income taxes and reduce complexity without decreasing the usefulness of information provided to users of financial statements. The adoption of this pronouncement did not have a significant impact on the Company's financial position, results of operations and cash flows.

Acquisitions

12 Months Ended

Dec. 31, 2015

Acquisitions [Abstract]

Business Combination Disclosure [Text Block]

Acquisitions

Endomondo

On January 5, 2015, the Company acquired 100% of the outstanding equity of Endomondo, a Denmark-based digital connected fitness company, to expand the Under Armour Connected Fitness community. The purchase price was $85.0 million, adjusted for working capital.

The Company recognized $0.6 million and $0.8 million in acquisition related costs that were expensed during the three months ended March 31, 2015 and December 31, 2014, respectively. These costs are included in the consolidated statements of income in the line item entitled “Selling, general and administrative expenses.” Pro forma results are not presented, as the acquisition was not considered material to the consolidated Company.

MyFitnessPal

On March 17, 2015, the Company acquired 100% of the outstanding equity of MFP, a digital nutrition and connected fitness company, to expand the Under Armour Connected Fitness community. The final adjusted transaction value totaled $474.0 million. The total consideration of $463.9 million was adjusted to reflect the accelerated vesting of certain share awards of MFP, which are not conditioned upon continued employment, and transaction costs borne by the selling shareholders. The acquisition was funded with $400.0 million of increased term loan borrowings and a draw on the revolving credit facility, with the remaining amount funded by cash on hand.

The Company recognized $5.7 million of acquisition related costs that were expensed during the three months ended March 31, 2015. These costs are included in the consolidated statement of income in the line item entitled “Selling, general and administrative expenses.”

The following represents the pro forma consolidated income statement as if MFP had been included in the consolidated results of the Company for the year ended December 31, 2015 and December 31, 2014:



	Year ended December 31,
(In thousands)	2015		2014
Net revenues	$	3,967,008	$	3,098,341
Net income	231,277		189,659

These amounts have been calculated after applying the Company’s accounting policies and adjusting the results of MFP to reflect the acquisition as if it closed on January 1, 2014. Pro forma net income for the year ended December 31, 2014 includes $5.7 million in transaction expenses which were included in the consolidated statement of income for the year ended December 31, 2015, but excluded from the calculation of pro forma net income for December 31, 2015.

These acquisitions have been accounted for as business combinations under the acquisition method and, accordingly, the total purchase price is allocated to the tangible and intangible assets acquired and the liabilities assumed based on their respective fair values on the acquisition dates, with the remaining unallocated purchase price recorded as goodwill. These purchase price allocations are final. The following table summarizes the allocation of estimated fair values of the net assets acquired, including the related estimated useful lives, where applicable:



	MyFitnessPal				Endomondo
	(in thousands)			Useful life (in years)	(in thousands)			Useful life (in years)
	(in thousands)			Useful life (in years)	(in thousands)			Useful life (in years)
Finite-lived intangible assets:
User base	$	38,300		10	$	10,600		10
Nutrition database	4,500			10	—			N/A
Technology	3,200			5	5,000			5
Trade name	2,300			5	400			5
Other assets acquired	16,190				3,738
Liabilities assumed	(3,291		)		(2,784		)
Net assets acquired	61,199				16,954
Goodwill	402,728				70,290
Total fair value of consideration	$	463,927			$	87,244

The Company estimated the acquisition date fair values of intangible assets based on income-based discounted cash flow models using estimates and assumptions regarding future operations. The Company is amortizing the intangible assets on a straight-line basis over their estimated useful lives. These costs are included in the consolidated statements of income in the line item entitled “Selling, general and administrative expenses.”

The goodwill recorded as a result of the acquisitions primarily reflects unidentified intangible assets acquired, including operational synergies across the Company, assembled workforces, the value of integrating acquired technologies and engaging and growing the connected fitness community. None of the goodwill is expected to be deductible for tax purposes. The following table summarizes the Company's allocation of goodwill to its operating segments:



	MyFitnessPal		Endomondo
	(in thousands)		(in thousands)
Goodwill:
North America	$	183,817	$	14,253
EMEA	81,300		29,452
Asia-Pacific	70,266		11,446
Latin America	55,275		988
Connected Fitness	12,070		14,151
Total goodwill	$	402,728	70,290

- Definition

The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).

+ References

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+ Details

Property And Equipment, Net

12 Months Ended

Dec. 31, 2015

Property, Plant and Equipment [Abstract]

Property and Equipment, Net

4. Property and Equipment, Net

Property and equipment consisted of the following:



	December 31,
(In thousands)	2015			2014
Leasehold and tenant improvements	$	214,834		$	128,088
Furniture, fixtures and displays	132,736			80,035
Buildings	47,137			46,419
Software	99,309			67,506
Office equipment	50,399			51,531
Plant equipment	118,138			70,317
Land	17,628			17,628
Construction in progress	147,581			57,677
Other	4,002			3,175
Subtotal property and equipment	831,764			522,376
Accumulated depreciation	(293,233		)	(216,812		)
Property and equipment, net	$	538,531		$	305,564

Construction in progress primarily includes costs incurred for software systems, leasehold improvements and in-store fixtures and displays not yet placed in use.

Depreciation expense related to property and equipment was $87.1 million, $63.6 million and $48.3 million for the years ended December 31, 2015, 2014 and 2013, respectively.

Goodwill and Intangible Assets, Net

12 Months Ended

Dec. 31, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets Disclosure

. Goodwill and Intangible Assets, Net

The following table summarizes changes in the carrying amount of the Company’s goodwill by reportable segment as of the periods indicated:



(In thousands)	North America			Connected Fitness			International			Total
Balance as of December 31, 2014	$	119,799		$	2,445		$	1,012		$	123,256
Goodwill acquired	198,417			26,217			248,724			473,358
Effect of currency translation adjustment	(1,363		)	(1,302		)	(8,768		)	(11,433		)
Balance as of December 31, 2015	$	316,853		$	27,360		$	240,968		$	585,181

The following table summarizes the Company’s intangible assets as of the periods indicated:



		December 31, 2015							December 31, 2014
(In thousands)	Useful Lives from Date of Acquisitions (in years)	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Intangible assets subject to amortization:
User base	10	$	47,922	$	(3,965	)	$	43,957	$	—	$	—		$	—
Technology	5-7	19,739		(5,041		)	14,698		12,000		(1,907		)	10,093
Customer relationships	2-3	10,738		(8,354		)	2,384		11,927		(4,692		)	7,235
Trade name	4-5	7,663		(3,036		)	4,627		5,000		(1,353		)	3,647
Nutrition database	10	4,500		(356		)	4,144		—		—			—
Lease-related intangible assets	1-15	3,896		(2,919		)	977		3,896		(2,762		)	1,134
Other	5-10	1,385		(444		)	941		2,196		(893		)	1,303
Total		$	95,843	$	(24,115	)	$	71,728	$	35,019	$	(11,607	)	$	23,412
Indefinite-lived intangible assets							3,958							2,818
Intangible assets, net							$	75,686						$	26,230

Amortization expense, which is included in selling, general and administrative expenses, was $13.9 million, $8.5 million and $2.1 million for the years ended December 31, 2015, 2014 and 2013, respectively. The following is the estimated amortization expense for the Company’s intangible assets as of December 31, 2015:



(In thousands)
2016	$	13,023
2017	10,530
2018	9,367
2019	9,260
2020	7,256
2021 and thereafter	22,292
Amortization expense of intangible assets	$	71,728

At December 31, 2015, 2014 and 2013, the Company determined that its goodwill and indefinite-lived intangible assets were not impaired.

- Definition

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

+ References + Details

Credit Facility and Long Term Debt

12 Months Ended

Dec. 31, 2015

Debt Disclosure [Abstract]

Credit Facility and Long Term Debt

Credit Facility and Other Long Term Debt

Credit Facility

In May 2014, the Company entered into a new unsecured $650.0 million credit agreement that provided for both revolving credit facility borrowings and term loan borrowings and had a term of five years through May 2019, with permitted extensions under certain circumstances. In March 2015, the Company amended the credit agreement to add an additional $150.0 million of term loan borrowings, resulting in aggregate term loan borrowings of $350.0 million, and increase revolving credit facility commitments to $800.0 million. As of December 31, 2015, the Company had $275.0 million of revolving borrowings outstanding under the revolving credit facility, and $525.0 million of remaining availability.

In January 2016, the Company further amended the credit agreement to increase revolving credit facility commitments from $800.0 million to $1.25 billion. This amendment also extended the term of the revolving credit facility and the remaining outstanding term loans under the credit agreement from May 2019 to January 2021. Simultaneously with entering into this, the Company borrowed $138.8 million under the revolving credit facility to repay in full the balance of the $150.0 million term loan borrowing originally borrowed in March 2015. After giving effect to this amendment and the related repayment, as well as additional borrowings under the revolving credit facility in February 2016, the Company had $565.0 million of revolving borrowings outstanding and $685.0 million of remaining availability under the revolving credit facility. At the request of the Company and the lenders' consent, revolving and/or term loan borrowings may be increased by up to $300.0 million in aggregate, subject to certain conditions as set forth in the credit agreement. Incremental borrowings are uncommitted and the availability thereof will depend on market conditions at the time the Company seeks to incur such borrowings.

Borrowings under the revolving credit facility may be made in U.S. Dollars, Euros, Pounds Sterling, Japanese Yen and

Canadian Dollars. These borrowings have maturities of less than one year but are classified as non-current as the Company has the intent and ability to refinance these obligations on a long-term basis. Up to $50.0 million of the facility may be used for the issuance of letters of credit and up to $50.0 million of the facility may be used for the issuance of swingline loans. There were $1.0 million of letters of credit and no swingline loans outstanding as of December 31, 2015.

The credit agreement contains negative covenants that, subject to significant exceptions, limit the ability of the Company and its subsidiaries to, among other things, incur additional indebtedness, make restricted payments, pledge their assets as security, make investments, loans, advances, guarantees and acquisitions, undergo fundamental changes and enter into transactions with affiliates. The Company is also required to maintain a ratio of consolidated EBITDA, as defined in the credit agreement, to consolidated interest expense of not less than 3.50 to 1.00 and is not permitted to allow the ratio of consolidated total indebtedness to consolidated EBITDA to be greater than 3.25 to 1.00 ("consolidated leverage ratio"). As of December 31, 2015, the Company was in compliance with these ratios. In addition, the credit agreement contains events of default that are customary for a facility of this nature, and includes a cross default provision whereby an event of default under other material indebtedness, as defined in the credit agreement, will be considered an event of default under the credit agreement.

Borrowings under the credit agreement bear interest at a rate per annum equal to, at the Company’s option, either (a) an alternate base rate, or (b) a rate based on the rates applicable for deposits in the interbank market for U.S. Dollars or the applicable currency in which the loans are made (“adjusted LIBOR”), plus in each case an applicable margin. The applicable margin for loans will be adjusted by reference to a grid (the “Pricing Grid”) based on the consolidated leverage ratio and ranges between 1.00% to 1.25% for adjusted LIBOR loans and 0.00% to 0.25% for alternate base rate loans. The weighted average interest rates under the outstanding term loans ranged from 1.29% to 1.32% and was 1.16% during the years ended December 31, 2015 and 2014, respectively. The weighted average interest rate under the revolving credit facility was 1.33% during the year ended December 31, 2015. The Company pays a commitment fee on the average daily unused amount of the revolving credit facility and certain fees with respect to letters of credit. As of December 31, 2015, the commitment fee was 15.0 basis points. The Company incurred and capitalized $2.9 million in deferred financing costs in connection with the credit facility.

Other Long Term Debt

The Company has long term debt agreements with various lenders to finance the acquisition or lease of qualifying capital investments. Loans under these agreements are collateralized by a first lien on the related assets acquired. At December 31, 2014 and 2013, the outstanding principal balance under these agreements was $2.0 million and $4.9 million, respectively. As of December 31, 2015 there was no outstanding principal balance under these agreements. Currently, advances under these agreements bear interest rates which are fixed at the time of each advance. The weighted average interest rates on outstanding borrowings were 3.3%, 3.1% and 3.3% for the years ended December 31, 2015, 2014 and 2013, respectively.

In December 2012, the Company entered into a $50.0 million recourse loan collateralized by the land, buildings and tenant improvements comprising the Company's corporate headquarters. The loan has a seven year term and maturity date of December 2019. The loan bears interest at one month LIBOR plus a margin of 1.50%, and allows for prepayment without penalty. The loan includes covenants and events of default substantially consistent with the new credit agreement discussed above. The loan also requires prior approval of the lender for certain matters related to the property, including transfers of any interest in the property. As of December 31, 2015, 2014 and 2013, the outstanding balance on the loan was $44.0 million, $46.0 million and $48.0 million, respectively. The weighted average interest rate on the loan was 1.7% for the years ended December 31, 2015, 2014 and 2013.

The following are the scheduled maturities of long term debt as of December 31, 2015:



(In thousands)
2016	$	42,000
2017	42,000
2018	42,000
2019	543,000
2020	—
2021 and thereafter	—
Total scheduled maturities of long term debt	669,000
Less current maturities of long term debt	42,000
Long term debt obligations	$	627,000

Interest expense, net was $14.6 million, $5.3 million and $2.9 million for the years ended December 31, 2015, 2014 and 2013, respectively. Interest expense includes the amortization of deferred financing costs and interest expense under the credit and long term debt facilities.

The Company monitors the financial health and stability of its lenders under the credit and other long term debt facilities, however during any period of significant instability in the credit markets lenders could be negatively impacted in their ability to perform under these facilities.

Commitments And Contingencies

12 Months Ended

Dec. 31, 2015

Commitments and Contingencies Disclosure [Abstract]

Commitments And Contingencies

Commitments and Contingencies

Obligations Under Operating Leases

The Company leases warehouse space, office facilities, space for its brand and factory house stores and certain equipment under non-cancelable operating leases. The leases expire at various dates through 2031, excluding extensions at the Company’s option, and include provisions for rental adjustments. The table below includes executed lease agreements for brand and factory house stores that the Company did not yet occupy as of December 31, 2015 and does not include contingent rent the Company may incur at its stores based on future sales above a specified minimum or payments made for maintenance, insurance and real estate taxes. The following is a schedule of future minimum lease payments for non-cancelable real property operating leases as of December 31, 2015 as well as significant operating lease agreements entered into during the period after December 31, 2015 through the date of this report:



(In thousands)
2016	$	84,620
2017	84,566
2018	81,912
2019	77,332
2020	73,808
2021 and thereafter	314,836
Total future minimum lease payments	$	717,074

Included in selling, general and administrative expense was rent expense of $83.0 million, $59.0 million and $41.8 million for the years ended December 31, 2015, 2014 and 2013, respectively, under non-cancelable operating lease agreements. Included in these amounts was contingent rent expense of $11.0 million, $11.0 million and $7.8 million for the years ended December 31, 2015, 2014 and 2013, respectively.

Sports Marketing and Other Commitments

Within the normal course of business, the Company enters into contractual commitments in order to promote the Company’s brand and products. These commitments include sponsorship agreements with teams and athletes on the collegiate and professional levels, official supplier agreements, athletic event sponsorships and other marketing commitments. The following is a schedule of the Company’s future minimum payments under its sponsorship and other marketing agreements as of December 31, 2015, as well as significant sponsorship and other marketing agreements entered into during the period after December 31, 2015 through the date of this report:



(In thousands)
2016	$	126,488
2017	138,607
2018	137,591
2019	98,486
2020	67,997
2021 and thereafter	289,374
Total future minimum sponsorship and other payments	$	858,543

The amounts listed above are the minimum compensation obligations and guaranteed royalty fees required to be paid under the Company’s sponsorship and other marketing agreements. The amounts listed above do not include additional performance incentives and product supply obligations provided under certain agreements. It is not possible to determine how much the Company will spend on product supply obligations on an annual basis as contracts generally do not stipulate specific cash amounts to be spent on products. The amount of product provided to the sponsorships depends on many factors including general playing conditions, the number of sporting events in which they participate and the Company’s decisions regarding product and marketing initiatives. In addition, the costs to design, develop, source and purchase the products furnished to the endorsers are incurred over a period of time and are not necessarily tracked separately from similar costs incurred for products sold to customers.

Other

In connection with various contracts and agreements, the Company has agreed to indemnify counterparties against certain third party claims relating to the infringement of intellectual property rights and other items. Generally, such indemnification obligations do not apply in situations in which the counterparties are grossly negligent, engage in willful misconduct, or act in bad faith. Based on the Company’s historical experience and the estimated probability of future loss, the Company has determined that the fair value of such indemnifications is not material to its consolidated financial position or results of operations.

From time to time, the Company is involved in litigation and other proceedings, including matters related to commercial and intellectual property disputes, as well as trade, regulatory and other claims related to its business. The Company believes that all current proceedings are routine in nature and incidental to the conduct of its business, and that the ultimate resolution of any such proceedings will not have a material adverse effect on its consolidated financial position, results of operations or cash flows.

Following the Company’s announcement of the creation of a new class of common stock, referred to as the Class C common stock, par value $0.0003 1/3 per share, four purported class action lawsuits were brought against the Company and the members of the Company’s Board of Directors on behalf of the stockholders of the Company, the first of which was filed on June 18, 2015. These lawsuits were filed in the Circuit Court for Baltimore City, Maryland (the "Court"), and were consolidated into one action, In re: Under Armour Shareholder Litigation, Case No. 24-C-15-003240. The lawsuits generally alleged that the individual defendants breached their fiduciary duties in connection with approving the creation of the Class C common stock, as well as in connection with recommending for approval by stockholders certain governance related changes to the Company’s charter.

On October 7, 2015, the Company announced that it had reached an agreement on settlement terms with the lead plaintiff. The Court has preliminarily approved the settlement terms, and is expected to determine whether to grant final approval of the settlement at hearing on February 29, 2016. Under the terms of the settlement, following the initial distribution of the Class C common stock, the Company has agreed to issue additional consideration to the holders of Class C common stock in the form of a dividend with a value of $59 million, which will be payable in the form of the Company’s Class A common stock, Class C common stock, cash or a combination thereof, to be determined at the sole discretion of the Company’s Board of Directors. This dividend must be authorized by the Board of Directors within approximately 60 days following the initial distribution of the Class C common stock. Additionally, the settlement agreement includes certain non-monetary remedies, including an amendment to the Confidentiality, Non-Competition and Non-Solicitation Agreement between the Company and Kevin A. Plank, the Company’s Chairman and Chief Executive Officer, and an agreement that the Company’s Board of Directors will undertake certain considerations when using more than a specified amount of shares of Class C common stock as consideration in certain acquisition transactions.

Stockholders' Equity	12 Months Ended
Stockholders' Equity	Dec. 31, 2015
Stockholders' Equity Note [Abstract]
Stockholders' Equity	Stockholders’ Equity The Company’s Class A Common Stock and Class B Convertible Common Stock have an authorized number of shares at December 31, 2015 of 400.0 million shares and 34.5 million shares, respectively, and each have a par value of $0.0003 1/3 per share. Holders of Class A Common Stock and Class B Convertible Common Stock have identical rights, including liquidation preferences, except that the holders of Class A Common Stock are entitled to one vote per share and holders of Class B Convertible Common Stock are entitled to 10 votes per share on all matters submitted to a stockholder vote. Class B Convertible Common Stock may only be held by Kevin Plank, the Company’s founder and Chief Executive Officer, or a related party of Mr. Plank, as defined in the Company’s charter. As a result, Mr. Plank has a majority voting control over the Company. Upon the transfer of shares of Class B Convertible Stock to a person other than Mr. Plank or a related party of Mr. Plank, the shares automatically convert into shares of Class A Common Stock on a one-for-one basis. In addition, all of the outstanding shares of Class B Convertible Common Stock will automatically convert into shares of Class A Common Stock on a one-for-one basis upon the death or disability of Mr. Plank or on the record date for any stockholders’ meeting upon which the shares of Class A Common Stock and Class B Convertible Common Stock beneficially owned by Mr. Plank is less than 15% of the total shares of Class A Common Stock and Class B Convertible Common Stock outstanding. Holders of the Company’s common stock are entitled to receive dividends when and if authorized and declared out of assets legally available for the payment of dividends. In June 2015, the Company's Board of Directors (the “Board”) approved Articles Supplementary to the Company's charter which designated 400,000,000 shares of common stock as a new class of common stock, referred to as the Class C common stock, par value $0.0003 1/3 per share. The Articles Supplementary became effective on June 15, 2015. The Company has not yet issued any shares of Class C common stock, but the Company has announced the intention of its Board to consider distributing shares of the Class C common stock as a dividend to the Company's holders of Class A and Class B common stock. The decision to proceed with, and timing of, this dividend will be made by the Board in its discretion and there can be no assurance that this dividend will be declared or paid. The terms of the Class C common stock are substantially identical to those of the Company's Class A common stock, except that the Class C common stock has no voting rights (except in limited circumstances), will automatically convert into Class A common stock under certain circumstances and includes provisions intended to ensure equal treatment of Class C common stock and Class B common stock in certain corporate transactions, such as mergers, consolidations, statutory share exchanges, conversions or negotiated tender offers, and including consideration incidental to these transactions.

- Definition

The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.

+ References

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Reference 15: http://www.xbrl.org/2003/role/presentationRef
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Reference 16: http://www.xbrl.org/2003/role/presentationRef
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+ Details

Fair Value Measurements

12 Months Ended

Dec. 31, 2015

Text Block [Abstract]

Fair Value Measurements

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (an exit price). The fair value accounting guidance outlines a valuation framework, creates a fair value hierarchy in order to increase the consistency and comparability of fair value measurements and the related disclosures, and prioritizes the inputs used in measuring fair value as follows:



Level 1:	Observable inputs such as quoted prices in active markets;

Level 2:	Inputs, other than quoted prices in active markets, that are observable either directly or indirectly; and

Level 3:	Unobservable inputs for which there is little or no market data, which require the reporting entity to develop its own assumptions.

Financial assets and (liabilities) measured at fair value are set forth in the table below:



	December 31, 2015							December 31, 2014
(In thousands)	Level 1		Level 2			Level 3		Level 1		Level 2			Level 3
Derivative foreign currency contracts (see Note 14)	$	—	$	3,811		$	—	$	—	$	806		$	—
Interest rate swap contracts (see Note 14)	—		(1,486		)	—		—		(607		)	—
TOLI policies held by the Rabbi Trust (see Note 13)	—		4,456			—		—		4,734			—
Deferred Compensation Plan obligations (see Note 13)	—		(5,072		)	—		—		(4,525		)	—
Available-for-sale securities	6,534		—			—		—		—			—

Fair values of the financial assets and liabilities listed above are determined using inputs that use as their basis readily observable market data that are actively quoted and are validated through external sources, including third-party pricing services and brokers. The foreign currency forward contracts represent gains and losses on derivative contracts, which is the net difference between the U.S. dollar value to be received or paid at the contracts’ settlement date and the U.S. dollar value of the foreign currency to be sold or purchased at the current forward exchange rate. The interest rate swap contract represents gains and losses on the derivative contract, which is the net difference between the fixed interest to be paid and variable interest to be received over the term of the contract based on current market rates. The fair value of the trust owned life insurance (“TOLI”) policies held by the Rabbi Trust is based on the cash-surrender value of the life insurance policies, which are invested primarily in mutual funds and a separately managed fixed income fund. These investments are initially made in the same funds and purchased in substantially the same amounts as the selected investments of participants in the Under Armour, Inc. Deferred Compensation Plan (the “Deferred Compensation Plan”), which represent the underlying liabilities to participants in the Deferred Compensation Plan. Liabilities under the Deferred Compensation Plan are recorded at amounts due to participants, based on the fair value of participants’ selected investments.

The carrying value of the Company's long term debt approximated its fair value as of December 31, 2015 and 2014. The fair value of the Company's long term debt was estimated based upon quoted prices for similar instruments (Level 2 input).

Provision For Income Taxes

12 Months Ended

Dec. 31, 2015

Taxes Payable [Abstract]

Provision For Income Taxes

Provision for Income Taxes

Income before income taxes is as follows:



	Year Ended December 31,
(In thousands)	2015		2014		2013
Income before income taxes:
United States	$	272,739	$	269,503	$	196,558
Foreign	113,946		72,707		64,435
Total	$	386,685	$	342,210	$	260,993

The components of the provision for income taxes consisted of the following:



	Year Ended December 31,
(In thousands)	2015			2014			2013
Current
Federal	$	102,317		$	110,439		$	85,542
State	27,500			24,419			19,130
Other foreign countries	28,336			16,489			13,295
	158,153			151,347			117,967
Deferred
Federal	707			(15,368		)	(14,722		)
State	(5,703		)	(4,073		)	(5,541		)
Other foreign countries	955			2,262			959
	(4,041		)	(17,179		)	(19,304		)
Provision for income taxes	$	154,112		$	134,168		$	98,663

A reconciliation from the U.S. statutory federal income tax rate to the effective income tax rate is as follows:



	Year Ended December 31,
	2015		2014		2013
U.S. federal statutory income tax rate	35.0	%	35.0	%	35.0	%
State taxes, net of federal tax impact	3.2		3.8		2.4
Unrecognized tax benefits	3.4		1.9		2.5
Nondeductible expenses	2.2		1.0		1.1
Foreign rate differential	(5.5	)	(4.5	)	(4.8	)
Foreign valuation allowance	2.7		2.5		1.5
Other	(1.1	)	(0.5	)	0.1
Effective income tax rate	39.9	%	39.2	%	37.8	%

The increase in the 2015 full year effective income tax rate, as compared to 2014, is primarily due to increased non-deductible costs incurred in connection with the Company's Connected Fitness acquisitions in 2015.

Deferred tax assets and liabilities consisted of the following:



	December 31,
(In thousands)	2015			2014
Deferred tax asset
Stock-based compensation	$	40,406		$	35,161
Allowance for doubtful accounts and other reserves	33,821			24,774
Accrued expenses	19,999			11,398
Foreign net operating loss carryforward	19,600			16,302
Deferred rent	13,991			11,005
Inventory obsolescence reserves	11,956			8,198
Tax basis inventory adjustment	10,019			5,845
U. S. net operating loss carryforward	9,217			4,733
Foreign tax credits	6,151			5,131
State tax credits, net of federal tax impact	4,966			4,245
Deferred compensation	2,080			1,858
Other	6,346			4,592
Total deferred tax assets	178,552			133,242
Less: valuation allowance	(24,043		)	(15,550		)
Total net deferred tax assets	154,509			117,692
Deferred tax liability
Property, plant and equipment	(31,069		)	(17,638		)
Intangible assets	(22,820		)	(7,010		)
Prepaid expenses	(8,766		)	(6,424		)
Other	(627		)	(612		)
Total deferred tax liabilities	(63,282		)	(31,684		)
Total deferred tax assets, net	$	91,227		$	86,008

In connection with the Company's acquisition of MyFitnessPal (see Note 3), the Company acquired $21.1 million in deferred tax assets associated with approximately $89.1 million in federal and state net operating loss (“NOLs”) carryforwards and $1.4 million in tax credit carryforwards. The acquisition resulted in a “change of ownership” within the meaning of Section 382 of the Internal Revenue Code, and, as a result, such NOLs are subject to an annual limitation.

As of December 31, 2015, the Company had $9.9 million in deferred tax assets associated with approximately $60.4 million in federal and state net operating losses and $1.4 million in tax credit carryforwards from the acquisition of MyFitnessPal remaining, which will expire beginning 2033 through 2035. Based upon the historical taxable income and projections of future taxable income over periods in which these NOLs will be deductible, the Company believes that it is more likely than not that the Company will be able to fully utilize these NOLs before the carry-forward periods expire beginning 2033 through 2035, and therefore a valuation allowance is not required.

As of December 31, 2015, the Company had $19.6 million in deferred tax assets associated with approximately $75.3 million in foreign net operating loss carryforwards, which will expire beginning 2017 through 2021. As of December 31, 2015, the Company believes certain deferred tax assets associated with foreign net operating loss carryforwards will expire unused based on the Company's projections. Therefore, a valuation allowance of $6.8 million was recorded against the Company's net deferred tax assets in 2015.

As of December 31, 2015, the Company had $6.2 million in deferred tax assets associated with foreign tax credits. As of December 31, 2015 the Company believes that a portion of the foreign taxes paid would not be creditable against its future income taxes. Therefore, a full valuation allowance was recorded against the Company's net deferred tax assets.

As of December 31, 2015, approximately $48.5 million of cash and cash equivalents was held by the Company's non-U.S. subsidiaries whose cumulative undistributed earnings total $298.5 million. Withholding and U.S. taxes have not been provided on the undistributed earnings as the earnings are being permanently reinvested in its non-U.S. subsidiaries. Determining the tax liability that would arise if these earnings were repatriated is not practical.

The Company utilizes the “with and without” method for intraperiod allocation of income tax provisions. Certain tax benefits associated with the Company’s stock-based compensation arrangements are recorded directly to stockholders’ equity including benefit from excess tax deductions.

As of December 31, 2015 and 2014, the total liability for unrecognized tax benefits, including related interest and penalties, was approximately $46.9 million and $31.3 million, respectively. The following table represents a reconciliation of the Company's total unrecognized tax benefits balances, excluding interest and penalties, for the years ended December 31, 2015, 2014 and 2013:



	Year Ended December 31,
(In thousands)	2015			2014			2013
Beginning of year	$	28,353		$	21,712		$	15,297
Increases as a result of tax positions taken in a prior period	203			250			—
Decreases as a result of tax positions taken in a prior period	—			—			—
Increases as a result of tax positions taken during the current period	14,382			8,947			7,526
Decreases as a result of tax positions taken during the current period	—			—			—
Decreases as a result of settlements during the current period	—			—			—
Reductions as a result of a lapse of statute of limitations during the current period	(327		)	(2,556		)	(1,111		)
End of year	$	42,611		$	28,353		$	21,712

As of December 31, 2015, $38.4 million of unrecognized tax benefits, excluding interest and penalties, would impact the Company's effective tax rate if recognized.

As of December 31, 2015, 2014 and 2013, the liability for unrecognized tax benefits included $4.3 million, $3.0 million and $2.4 million, respectively, for the accrual of interest and penalties. For each of the years ended December 31, 2015, 2014 and 2013, the Company recorded $1.7 million, $1.2 million and $1.0 million, respectively, for the accrual of interest and penalties in its consolidated statements of income. The Company recognizes accrued interest and penalties related to unrecognized tax benefits in the provision for income taxes on the consolidated statements of income.

The Company files income tax returns in the U.S. federal jurisdiction and various state and foreign jurisdictions. The Company is currently under audit by the Internal Revenue Service for the 2011, 2012, and 2013 tax years. The majority of the Company's returns for years before 2012 are no longer subject to U.S. federal, state and local or foreign income tax examinations by tax authorities.

The total amount of unrecognized tax benefits relating to the Company's tax positions is subject to change based on future events including, but not limited to, the settlements of ongoing tax audits and assessments and the expiration of applicable statutes of limitations. Although the outcomes and timing of such events are highly uncertain, the Company does not anticipate that the balance of gross unrecognized tax benefits, excluding interest and penalties, will change significantly during the next twelve months. However, changes in the occurrence, expected outcomes, and timing of such events could cause the Company's current estimates to change materially in the future.

Earnings per Share

12 Months Ended

Dec. 31, 2015

Text Block [Abstract]

Earnings per Share

The calculation of earnings per share for common stock shown below excludes the income attributable to outstanding restricted stock awards from the numerator and excludes the impact of these awards from the denominator. The following is a reconciliation of basic earnings per share to diluted earnings per share:



	Year Ended December 31,
(In thousands, except per share amounts)	2015		2014		2013
Numerator
Net income	$	232,573	$	208,042	$	162,330
Denominator
Weighted average common shares outstanding	215,498		213,227		210,696
Effect of dilutive securities	5,370		6,153		5,262
Weighted average common shares and dilutive securities outstanding	220,868		219,380		215,958
Earnings per share—basic	$	1.08	$	0.98	$	0.77
Earnings per share—diluted	$	1.05	$	0.95	$	0.75

Effects of potentially dilutive securities are presented only in periods in which they are dilutive. Stock options, restricted stock units and warrants representing 770.0 thousand, 22.6 thousand and 116.9 thousand shares of common stock were outstanding for the years ended December 31, 2015, 2014 and 2013, respectively, but were excluded from the computation of diluted earnings per share because their effect would be anti-dilutive.

Stock-Based Compensation

12 Months Ended

Dec. 31, 2015

Share-based Compensation, Allocation and Classification in Financial Statements [Abstract]

Stock-Based Compensation

Stock Compensation Plans

The Under Armour, Inc. Second Amended and Restated 2005 Omnibus Long-Term Incentive Plan (the “2005 Plan”) provides for the issuance of stock options, restricted stock, restricted stock units and other equity awards to officers, directors, key employees and other persons. Stock options and restricted stock and restricted stock unit awards under the 2005 Plan generally vest ratably over a two to four year period. The contractual term for stock options is generally ten years from the date of grant. The Company generally receives a tax deduction for any ordinary income recognized by a participant in respect to an award under the 2005 Plan. The 2005 Plan terminates in 2025. As of December 31, 2015, 18.1 million shares are available for future grants of awards under the 2005 Plan.

Total stock-based compensation expense for the years ended December 31, 2015, 2014 and 2013 was $60.4 million, $50.8 million and $43.2 million, respectively. As of December 31, 2015, the Company had $46.3 million of unrecognized compensation expense expected to be recognized over a weighted average period of 1.1 years. This unrecognized compensation expense does not include any expense related to performance-based restricted stock units and stock options for which the performance targets have not been deemed probable as of December 31, 2015. Refer to “Stock Options” and “Restricted Stock and Restricted Stock Units” below for further information on these awards.

Employee Stock Purchase Plan

The Company’s Employee Stock Purchase Plan (the “ESPP”) allows for the purchase of Class A Common Stock by all eligible employees at a 15% discount from fair market value subject to certain limits as defined in the ESPP. As of December 31, 2015, 2.7 million shares are available for future purchases under the ESPP. During the years ended December 31, 2015, 2014 and 2013, 103.3 thousand, 87.6 thousand and 108.4 thousand shares were purchased under the ESPP, respectively.

Non-Employee Director Compensation Plan and Deferred Stock Unit Plan

The Company’s Non-Employee Director Compensation Plan (the “Director Compensation Plan”) provides for cash compensation and equity awards to non-employee directors of the Company under the 2005 Plan. Non-employee directors have the option to defer the value of their annual cash retainers as deferred stock units in accordance with the Under Armour, Inc. Non-Employee Deferred Stock Unit Plan (the “DSU Plan”). Each new non-employee director receives an award of restricted stock units upon the initial election to the Board of Directors, with the units covering stock valued at $100.0 thousand on the grant date and vesting in three equal annual installments. In addition, each non-employee director receives, following each annual stockholders’ meeting, a grant under the 2005 Plan of restricted stock units covering stock valued at $125.0 thousand on the grant date. Each award vests 100% on the date of the next annual stockholders’ meeting following the grant date.

The receipt of the shares otherwise deliverable upon vesting of the restricted stock units automatically defers into deferred stock units under the DSU Plan. Under the DSU Plan each deferred stock unit represents the Company’s obligation to issue one share of the Company’s Class A Common Stock with the shares delivered six months following the termination of the director’s service.

Stock Options

The weighted average fair value of a stock option granted for the years ended December 31, 2015 and December 31, 2013 was $54.59 and $12.91, respectively. There were no stock options granted during the year ended December 31, 2014. The fair value of each stock option granted is estimated on the date of grant using the Black-Scholes option-pricing model with the following weighted average assumptions:



	Year Ended December 31,
	2015		2014		2013
Risk-free interest rate	1.8	%	—	%	1.2	%
Average expected life in years	6.00		0		6.25
Expected volatility	44.3	%	—	%	55.4	%
Expected dividend yield	—	%	—	%	—	%

A summary of the Company’s stock options as of December 31, 2015, 2014 and 2013, and changes during the years then ended is presented below:



(In thousands, except per share amounts)	Year Ended December 31,
(In thousands, except per share amounts)	2015				2014				2013
	Number of Stock Options		Weighted Average Exercise Price		Number of Stock Options		Weighted Average Exercise Price		Number of Stock Options		Weighted Average Exercise Price
Outstanding, beginning of year	2,811		$	8.28	4,272		$	8.11	6,298		$	7.66
Granted, at fair market value	579		40.30		—		—		20		24.35
Exercised	(360	)	7.92		(1,454	)	7.74		(1,822	)	6.68
Expired	—		—		—		—		—		—
Forfeited	(26	)	4.53		(7	)	16.46		(224	)	8.41
Outstanding, end of year	3,004		$	14.52	2,811		$	8.28	4,272		$	8.11
Options exercisable, end of year	2,446		$	8.26	2,707		$	7.87	2,346		$	7.80

Included in the table above are 0.3 million performance-based stock options awarded to certain executives and key employees under the 2005 Plan during the year ended December 31, 2015. These performance-based stock options have a weighted average fair value of $72.90 and have vesting that is tied to the achievement of certain combined annual operating income targets.

During the year ended December 31, 2015, the Company deemed the achievement of certain operating income targets probable for the performance-based stock options granted in 2015, and recorded $2.4 million for these awards, including a cumulative adjustment of $0.9 million during the three months ended September 30, 2015. The Company will assess the probability of the achievement of the operating income targets at the end of each reporting period. If it becomes probable that any remaining performance targets related to these performance-based stock options will be achieved, a cumulative adjustment will be recorded as if ratable stock-based compensation expense had been recorded since the grant date. Additional stock based compensation of up to $0.6 million would have been recorded through December 31, 2015 for all performance-based stock options had the full achievement of these operating income targets been deemed probable.

The intrinsic value of stock options exercised during the years ended December 31, 2015, 2014 and 2013 was $27.5 million, $73.0 million and $44.1 million, respectively.

The following table summarizes information about stock options outstanding and exercisable as of December 31, 2015:

(In thousands, except per share amounts)



Options Outstanding						Options Exercisable
Number of Underlying Shares	Weighted Average Exercise Price Per Share		Weighted Average Remaining Contractual Life (Years)	Total Intrinsic Value		Number of Underlying Shares	Weighted Average Exercise Price Per Share		Weighted Average Remaining Contractual Life (Years)	Total Intrinsic Value
3,004	$	14.52	4.91	$	198,535	2,446	$	8.26	4.05	$	176,973

Restricted Stock and Restricted Stock Units

A summary of the Company’s restricted stock and restricted stock units as of December 31, 2015, 2014 and 2013, and changes during the years then ended is presented below:



	Year Ended December 31,
(In thousands, except per share amounts)	2015				2014				2013
	Number of Restricted Shares		Weighted Average Fair Value		Number of Restricted Shares		Weighted Average Fair Value		Number of Restricted Shares		Weighted Average Fair Value
Outstanding, beginning of year	4,510		$	30.42	5,244		$	22.19	4,514		$	19.51
Granted	1,015		76.72		1,061		54.17		1,682		26.35
Forfeited	(326	)	48.57		(958	)	20.98		(410	)	17.37
Vested	(1,819	)	23.22		(837	)	19.49		(542	)	16.76
Outstanding, end of year	3,380		$	46.45	4,510		$	30.42	5,244		$	22.19

Included in the table above are 0.8 million, 1.0 million and 1.4 million performance-based restricted stock units awarded to certain executives and key employees under the 2005 Plan during the years ended December 31, 2015, 2014 and 2013, respectively. These performance-based restricted stock units have a weighted average fair value of $46.91 and have vesting that is tied to the achievement of certain combined annual operating income targets.

During the year ended December 31, 2015, the Company deemed the achievement of certain operating income targets probable for the awards granted in 2015 and 2014, and recorded $30.8 million for a portion of these awards, including a cumulative adjustment of $9.1 million during the three months ended September 30, 2015. During the year ended December 31, 2014, the Company deemed the achievement of certain operating targets probable for the awards granted in 2014, 2013 and 2012, and recorded $38.4 million for a portion of these awards, including cumulative adjustments of $6.6 million during the three months ended March 31, 2014 and $3.8 million during the three months ended December 31, 2014. During the year ended December 31, 2013, the Company deemed the achievement of certain operating income targets probable for the awards granted in 2013, 2012 and 2011, and recorded $30.8 million for a portion of these awards, including a cumulative adjustment of $9.0 million during the three months ended March 31, 2013 and $11.3 million during the three months ended December 31, 2013. The Company will assess the probability of the achievement of the operating income targets at the end of each reporting period. If it becomes probable that any remaining performance targets related to these performance-based restricted stock units will be achieved, a cumulative adjustment will be recorded as if ratable stock-based compensation expense had been recorded since the grant date. Additional stock based compensation of up to $3.0 million would have been recorded through December 31, 2015 for all performance-based restricted stock units had the full achievement of these operating income targets been deemed probable.

Warrants

In 2006, the Company issued fully vested and non-forfeitable warrants to purchase 1.9 million shares of the Company’s Class A Common Stock to NFL Properties as partial consideration for footwear promotional rights which were recorded as an intangible asset. With the assistance of an independent third party valuation firm, the Company assessed the fair value of the warrants using various fair value models. Using these measures, the Company concluded that the fair value of the warrants was $3.6 million. The warrants have a term of 12 years from the date of issuance and an exercise price of $9.25 per share, which is the adjusted closing price of the Company’s Class A Common Stock on the date of issuance. As of December 31, 2015, all outstanding warrants were exercisable, and no warrants were exercised.

Other Employee Benefits	12 Months Ended
Other Employee Benefits	Dec. 31, 2015
Compensation Related Costs [Abstract]
Other Employee Benefits	Other Employee Benefits The Company offers a 401(k) Deferred Compensation Plan for the benefit of eligible employees. Employee contributions are voluntary and subject to Internal Revenue Service limitations. The Company matches a portion of the participant’s contribution and recorded expense of $7.0 million, $4.9 million and $2.7 million for the years ended December 31, 2015, 2014 and 2013, respectively. Shares of the Company’s Class A Common Stock are not an investment option in this plan. In addition, the Company offers the Under Armour, Inc. Deferred Compensation Plan which allows a select group of management or highly compensated employees, as approved by the Compensation Committee, to make an annual base salary and/or bonus deferral for each year. As of December 31, 2015 and 2014, the Deferred Compensation Plan obligations were $5.1 million and $4.5 million, respectively, and were included in other long term liabilities on the consolidated balance sheets. The Company established the Rabbi Trust to fund obligations to participants in the Deferred Compensation Plan. As of December 31, 2015 and 2014, the assets held in the Rabbi Trust were TOLI policies with cash-surrender values of $4.5 million and $4.7 million, respectively. These assets are consolidated and are included in other long term assets on the consolidated balance sheet. Refer to Note 9 for a discussion of the fair value measurements of the assets held in the Rabbi Trust and the Deferred Compensation Plan obligations.

- Definition

The entire disclosure for compensation costs, including compensated absences accruals, compensated absences liability, deferred compensation arrangements and income statement compensation items. Deferred compensation arrangements may include a description of an arrangement with an individual employee, which is generally an employment contract between the entity and a selected officer or key employee containing a promise by the employer to pay certain amounts at designated future dates, usually including a period after retirement, upon compliance with stipulated requirements. This type of arrangement is distinguished from broader based employee benefit plans as it is usually tailored to the employee. Disclosure also typically includes the amount of related compensation expense recognized during the reporting period, the number of shares (units) issued during the period under such arrangements, and the carrying amount as of the balance sheet date of the related liability.

+ References + Details

Risk Management and Derivatives

12 Months Ended

Dec. 31, 2015

Text Block [Abstract]

Foreign Currency Risk Management and Derivatives

Risk Management and Derivatives

Foreign Currency Risk Management

The Company is exposed to gains and losses resulting from fluctuations in foreign currency exchange rates relating to transactions generated by its international subsidiaries in currencies other than their local currencies. These gains and losses are primarily driven by intercompany transactions and inventory purchases denominated in currencies other than the functional currency of the purchasing entity. From time to time, the Company may elect to enter into foreign currency contracts to reduce the risk associated with foreign currency exchange rate fluctuations on intercompany transactions and projected inventory purchases for its international subsidiaries.

As of December 31, 2015, the aggregate notional value of the Company's outstanding foreign currency contracts was $468.1 million, which was comprised of Canadian Dollar/U.S. Dollar, Euro/U.S. Dollar, Yen/Euro, Mexican Peso/Euro and Pound Sterling/Euro currency pairs with contract maturities ranging from one to eleven months. A portion of the Company's foreign currency forward contracts are not designated as cash flow hedges, and accordingly, changes in their fair value are recorded in earnings. During 2014, the Company began entering into foreign currency contracts designated as cash flow hedges. For foreign currency contracts designated as cash flow hedges, changes in fair value, excluding any ineffective portion, are recorded in other comprehensive income until net income is affected by the variability in cash flows of the hedged transaction. The effective portion is generally released to net income after the maturity of the related derivative and is classified in the same manner as the underlying exposure. During the years ended December 31, 2015 and 2014, the Company reclassified $3.5 million and $0.4 million from other comprehensive income to cost of goods sold related to foreign currency contracts designated as cash flow hedges, respectively. The fair values of the Company’s foreign currency contracts were assets of $3.8 million and $0.8 million as of December 31, 2015 and 2014, respectively, and were included in prepaid expenses and other current assets on the consolidated balance sheet. Refer to Note 9 for a discussion of the fair value measurements. Included in other expense, net were the following amounts related to changes in foreign currency exchange rates and derivative foreign currency forward contracts:



(In thousands)	Year Ended December 31,
(In thousands)	2015			2014			2013
Unrealized foreign currency exchange rate gains (losses)	$	(33,359	)	$	(11,739	)	$	(1,905	)
Realized foreign currency exchange rate gains (losses)	7,643			2,247			477
Unrealized derivative gains (losses)	388			1			13
Realized derivative gains (losses)	16,404			3,081			243

Interest Rate Risk Management

In order to maintain liquidity and fund business operations, the Company enters into long term debt arrangements with various lenders which bear a range of fixed and variable rates of interest. The nature and amount of the Company's long-term debt can be expected to vary as a result of future business requirements, market conditions and other factors. The Company may elect to enter into interest rate swap contracts to reduce the impact associated with interest rate fluctuations. The Company utilizes interest rate swap contracts to convert a portion of variable rate debt to fixed rate debt. The contracts pay fixed and receive variable rates of interest. The interest rate swap contracts are accounted for as cash flow hedges and accordingly, the effective portion of the changes in their fair value are recorded in other comprehensive income and reclassified into interest expense over the life of the underlying debt obligation. Refer to Note 6 for a discussion of long term debt.

As of December 31, 2015, the notional value of our outstanding interest rate swap contracts was $170.7 million. During the years ended December 31, 2015 and 2014, the Company recorded a $2.7 million and $1.7 million increase in interest expense, respectively, representing the effective portion of the contracts reclassified from accumulated other comprehensive income. The fair value of the interest rate swap contracts was a liability of $1.5 million and $0.6 million as of December 31, 2015 and December 31, 2014, respectively, and were included in other long term liabilities on the consolidated balance sheet.

The Company enters into derivative contracts with major financial institutions with investment grade credit ratings and is exposed to credit losses in the event of non-performance by these financial institutions. This credit risk is generally limited to the unrealized gains in the foreign currency forward contracts. However, the Company monitors the credit quality of these financial institutions and considers the risk of counterparty default to be minimal.

- Definition

The entire disclosure for derivative instruments and hedging activities including, but not limited to, risk management strategies, non-hedging derivative instruments, assets, liabilities, revenue and expenses, and methodologies and assumptions used in determining the amounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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+ Details

Related Party Transactions	12 Months Ended
Related Party Transactions	Dec. 31, 2015
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions The Company has an operating lease agreement with an entity controlled by the Company’s CEO to lease an aircraft for business purposes. The Company paid $2.0 million, $1.8 million and $1.0 million in lease payments to the entity for its use of the aircraft during the years ended December 31, 2015, 2014 and 2013, respectively. No amounts were payable to this related party as of December 31, 2015 and 2014. The Company determined the lease payments were at fair market lease rates. During 2014, the Company entered into a lease agreement with an entity controlled by the Company’s CEO to lease corporate office space. The lease has a 10 year term beginning in 2016 and lease payments are expected to begin at $1.1 million annually with an annual escalation of 2.0% thereafter. The Company determined the lease payments were at fair market lease rates. This lease was accounted for as a build-to-suit lease. In January 2016, the Company entered into an additional lease agreement with an entity controlled by the Company’s CEO to lease office space for an innovation lab and light-manufacturing facility. The lease has a 5 year term beginning in 2016 and lease payments are expected to begin at $515 thousand annually with an annual escalation of 2.5% thereafter. The Company determined the lease payments were at fair market lease rates.

- Definition

The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.

+ References + Details

Segment Data and Related Information

12 Months Ended

Dec. 31, 2015

Segment Data and Related Information

The Company’s operating segments are based on how the Chief Operating Decision Maker (“CODM”) makes decisions about allocating resources and assessing performance. As such, the CODM receives discrete financial information for the Company's principal business by geographic region based on the Company’s strategy to become a global brand. These geographic regions include North America; Latin America; Europe, the Middle East and Africa (“EMEA”); and Asia-Pacific. Each geographic segment operates exclusively in one industry: the development, marketing and distribution of branded performance apparel, footwear and accessories. Beginning in the first quarter of 2015, the CODM began receiving discrete financial information for the Company's Connected Fitness business. Following the completion of the Company's acquisition of Endomondo and MFP in 2015, the Company has determined its Connected Fitness business is significant and will no longer be

combined into international for disclosure purposes.

The net revenues and operating income (loss) associated with the Company's segments are summarized in the following tables. Net revenues represent sales to external customers for each segment. Intercompany balances were eliminated for separate disclosure. The majority of corporate service costs within North America have not been allocated to international or Connected Fitness; however, certain costs and revenues included within North America in the prior period have been allocated to Connected Fitness in the current period. Prior period segment data has been recast by an immaterial amount within the tables below to conform to current period presentation.



(In thousands)	Year Ended December 31,
(In thousands)	2015		2014		2013
Net revenues
North America	$	3,455,737	$	2,796,374	$	2,193,739
International	454,161		268,771		137,244
Connected Fitness	53,415		19,225		1,068
Total net revenues	$	3,963,313	$	3,084,370	$	2,332,051



(In thousands)	Year Ended December 31,
(In thousands)	2015			2014			2013
Operating income (loss)
North America	$	460,961		$	379,814		$	271,338
International	8,887			(5,190		)	(5,706		)
Connected Fitness	(61,301		)	(20,669		)	(534		)
Total operating income	408,547			353,955			265,098
Interest expense, net	(14,628		)	(5,335		)	(2,933		)
Other expense, net	(7,234		)	(6,410		)	(1,172		)
Income before income taxes	$	386,685		$	342,210		$	260,993

Net revenues by product category are as follows:



(In thousands)	Year Ended December 31,
(In thousands)	2015		2014		2013
Apparel	$	2,801,062	$	2,291,520	$	1,762,150
Footwear	677,744		430,987		298,825
Accessories	346,885		275,409		216,098
Total net sales	3,825,691		2,997,916		2,277,073
Licensing revenues	84,207		67,229		53,910
Connected Fitness	53,415		19,225		1,068
Total net revenues	$	3,963,313	$	3,084,370	$	2,332,051

As of December 31, 2015 and 2014, the majority of the Company’s long-lived assets were located in the United States. Net revenues in the United States were $3,268.8 million, $2,651.1 million and $2,082.5 million for the years ended December 31, 2015, 2014 and 2013, respectively.

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

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+ Details

Unaudited Quarterly Financial Data

12 Months Ended

Dec. 31, 2015

Quarterly Financial Data [Abstract]

Unaudited Quarterly Financial Data



(In thousands)	Quarter Ended (unaudited)								Year Ended December 31,
(In thousands)	March 31,		June 30,		September 30,		December 31,		Year Ended December 31,
2015
Net revenues	$	804,941	$	783,577	$	1,204,109	$	1,170,686	$	3,963,313
Gross profit	377,664		379,053		587,160		561,670		1,905,547
Income from operations	27,667		31,901		171,397		177,582		408,547
Net income	11,728		14,766		100,477		105,602		232,573
Earnings per share-basic	$	0.05	$	0.07	$	0.47	$	0.49	$	1.08
Earnings per share-diluted	$	0.05	$	0.07	$	0.45	$	0.48	$	1.05
2014
Net revenues	$	641,607	$	609,654	$	937,908	$	895,201	$	3,084,370
Gross profit	300,690		299,952		465,300		446,264		1,512,206
Income from operations	26,856		34,694		146,106		146,299		353,955
Net income	13,538		17,690		89,105		87,709		208,042
Earnings per share-basic	$	0.06	$	0.08	$	0.42	$	0.41	$	0.98
Earnings per share-diluted	$	0.06	$	0.08	$	0.41	$	0.40	$	0.95

Valuation And Qualifying Accounts

12 Months Ended

Dec. 31, 2015

Valuation and Qualifying Accounts [Abstract]

Valuation And Qualifying Accounts

Schedule II

Valuation and Qualifying Accounts

(In thousands)



Description	Balance at Beginning of Year		Charged to Costs and Expenses		Write-Offs Net of Recoveries			Balance at End of Year
Allowance for doubtful accounts
For the year ended December 31, 2015	$	3,693	$	2,951	$	(714	)	$	5,930
For the year ended December 31, 2014	2,938		1,028		(273		)	3,693
For the year ended December 31, 2013	3,286		210		(558		)	2,938
Sales returns and allowances
For the year ended December 31, 2015	$	52,973	$	145,828	$	(126,186	)	$	72,615
For the year ended December 31, 2014	34,102		156,791		(137,920		)	52,973
For the year ended December 31, 2013	32,919		135,739		(134,556		)	34,102
Deferred tax asset valuation allowance
For the year ended December 31, 2015	$	15,550	$	8,493	$	—		$	24,043
For the year ended December 31, 2014	8,091		7,581		(122		)	15,550
For the year ended December 31, 2013	3,996		4,095		—			8,091

Summary of Significant Accounting Policies (Policies)	12 Months Ended
Summary of Significant Accounting Policies (Policies)	Dec. 31, 2015
Text Block [Abstract]
Basis of Presentation and Significant Accounting Policies	Basis of Presentation The accompanying consolidated financial statements include the accounts of Under Armour, Inc. and its wholly owned subsidiaries (the “Company”). All intercompany balances and transactions have been eliminated. The accompanying consolidated financial statements were prepared in accordance with accounting principles generally accepted in the United States of America. On March 17, 2014, the Board of Directors declared a two-for-one stock split of the Company's Class A and Class B common stock, which was effected in the form of a 100% common stock dividend distributed on April 14, 2014. Stockholders' equity and all references to share and per share amounts in the accompanying consolidated financial statements have been retroactively adjusted to reflect the two-for-one stock split for all periods presented. On January 5, 2015, the Company acquired 100% of the outstanding equity of Endomondo ApS (“Endomondo”), a Denmark-based digital connected fitness company. On March 17, 2015, the Company acquired 100% of the outstanding equity of MyFitnessPal, Inc. (“MFP”), a digital nutrition and connected fitness company. Both companies were acquired to expand the Under Armour Connected Fitness community. The purchase price allocation for each acquisition is reflected in the consolidated balance sheet as of December 31, 2015. The Company identified a prior period error in the classification of available-for-sale securities (“AFS”) for the first and second quarters of 2015. The Company concluded that the error was not material to any of its previously issued financial statements. The Company included purchases and sales of AFS for the first six months of 2015 of $41.5 million and $19.4 million, respectively, in its cash flows from investing activities for the six months ended June 30, 2015. Additionally, the Company intends to revise the affected periods when they are presented on a comparable basis to reflect the correct accounting. The revision will result in a reclassification from "Cash and cash equivalents" to "Prepaid expenses and other current assets" on the 2015 first and second quarter balance sheets of $7.1 million and $22.1 million, respectively. Correspondingly, the revision will result in the presentation of purchases and sales of AFS for the three months ended March 31, 2015 of $10.4 million and $3.3 million,respectively, in addition to the six months 2015 cash flow activities described above.
Earnings Per Share, Policy	Earnings per Share Basic earnings per common share is computed by dividing net income available to common stockholders for the period by the weighted average number of common shares outstanding during the period. Any stock-based compensation awards that are determined to be participating securities, which are stock-based compensation awards that entitle the holders to receive dividends prior to vesting, are included in the calculation of basic earnings per share using the two class method. Diluted earnings per common share is computed by dividing net income available to common stockholders for the period by the diluted weighted average common shares outstanding during the period. Diluted earnings per share reflects the potential dilution from common shares issuable through stock options, warrants, restricted stock units and other equity awards. Refer to Note 11 for further discussion of earnings per share.
Cost Based Investment	Minority Investment The Company holds a minority investment in Dome Corporation (“Dome”), the Company’s Japanese licensee. The Company invested ¥1,140.0 million, or $15.5 million, in exchange for 19.5% common stock ownership in Dome. As of December 31, 2015 and 2014, the carrying value of the Company’s investment was $12.0 million and $13.4 million, respectively, and was included in other long term assets on the consolidated balance sheets. The investment is subject to foreign currency translation rate fluctuations as it is held by the Company’s European subsidiary. The Company accounts for its investment in Dome under the cost method given that it does not have the ability to exercise significant influence. Additionally, the Company concluded that no event or change in circumstances occurred during the year ended December 31, 2015 that may have a significant adverse effect on the fair value of the investment.
Advertising Costs, Policy	Advertising Costs Advertising costs are charged to selling, general and administrative expenses. Advertising production costs are expensed the first time an advertisement related to such production costs is run. Media (television, print and radio) placement costs are expensed in the month during which the advertisement appears, and costs related to event sponsorships are expensed when the event occurs. In addition, advertising costs include sponsorship expenses. Accounting for sponsorship payments is based upon specific contract provisions and the payments are generally expensed uniformly over the term of the contract after recording expense related to specific performance incentives once they are deemed probable. Advertising expense, including amortization of in-store marketing fixtures and displays, was $417.8 million, $333.0 million and $246.5 million for the years ended December 31, 2015, 2014 and 2013, respectively. At December 31, 2015 and 2014, prepaid advertising costs were $37.5 million and $31.1 million, respectively.
Foreign Currency Transactions and Translations Policy	Foreign Currency Translation and Transactions The functional currency for each of the Company’s wholly owned foreign subsidiaries is generally the applicable local currency. The translation of foreign currencies into U.S. dollars is performed for assets and liabilities using current foreign currency exchange rates in effect at the balance sheet date and for revenue and expense accounts using average foreign currency exchange rates during the period. Capital accounts are translated at historical foreign currency exchange rates. Translation gains and losses are included in stockholders’ equity as a component of accumulated other comprehensive income. Adjustments that arise from foreign currency exchange rate changes on transactions, primarily driven by intercompany transactions, denominated in a currency other than the functional currency are included in other expense, net on the consolidated statements of income.
Impairment or Disposal of Long-Lived Assets, Including Intangible Assets, Policy	Goodwill, Intangible Assets and Long-Lived Assets Goodwill and intangible assets are recorded at their estimated fair values at the date of acquisition and are allocated to the reporting units that are expected to receive the related benefits. Goodwill and indefinite lived intangible assets are not amortized and are required to be tested for impairment at least annually or sooner whenever events or changes in circumstances indicate that the assets may be impaired. In conducting an annual impairment test, the Company first reviews qualitative factors to determine whether it is more likely than not that the fair value of the reporting unit is less than its carrying amount. If factors indicate that is the case, or if goodwill is allocated to a reporting unit for the first time, the Company performs the two-step goodwill impairment test. The first step, identifying a potential impairment, compares the fair value of the reporting unit with its carrying amount. We calculate fair value using the discounted cash flows model, which indicates the fair value of the reporting unit based on the present value of the cash flows that we expect the reporting unit to generate in the future. Our significant estimates in the discounted cash flows model include: our weighted average cost of capital, long-term rate of growth and profitability of the reporting unit’s business, and working capital effects. If the carrying amount exceeds its fair value, the second step will be performed. The second step, measuring the impairment loss, compares the implied fair value of the goodwill with the carrying amount of the goodwill. Any excess of the goodwill carrying amount over the applied fair value is recognized as an impairment loss, and the carrying value of goodwill is written down to fair value.The Company performs its annual impairment tests in the fourth quarter of each fiscal year. As of December 31, 2015, no impairment of goodwill was identified, and no reporting unit was at risk of failing step one of the impairment test. The Company continually evaluates whether events and circumstances have occurred that indicate the remaining estimated useful life of long-lived assets may warrant revision or that the remaining balance may not be recoverable. These factors may include a significant deterioration of operating results, changes in business plans, or changes in anticipated cash flows. When factors indicate that an asset should be evaluated for possible impairment, the Company reviews long-lived assets to assess recoverability from future operations using undiscounted cash flows. If future undiscounted cash flows are less than the carrying value, an impairment is recognized in earnings to the extent that the carrying value exceeds fair value.
Inventory, Policy	Inventories Inventories consist primarily of finished goods. Costs of finished goods inventories include all costs incurred to bring inventory to its current condition, including inbound freight, duties and other costs. The Company values it using the first-in, first-out method of cost determination. Market value is estimated based upon assumptions made about future demand and retail market conditions. If the Company determines that the estimated market value of its inventory is less than the carrying value of such inventory, it records a charge to cost of goods sold to reflect the lower of cost or market. If actual market conditions are less favorable than those projected by the Company, further adjustments may be required that would increase the cost of goods sold in the period in which such a determination was made.
Concentration of Credit Risk	Concentration of Credit Risk Financial instruments that subject the Company to significant concentration of credit risk consist primarily of accounts receivable. The majority of the Company’s accounts receivable is due from large sporting goods retailers. Credit is extended based on an evaluation of the customer’s financial condition and collateral is not required. The Company's largest customer in North America accounted for 18.7% and 23.4% of accounts receivable as of December 31, 2015 and December 31, 2014, respectively. The Company's largest customer accounted for 11.5%, 14.4% and 16.6% of net revenues for the years ended December 31, 2015, 2014 and 2013, respectively.
Allowance For Doubtful Accounts	Allowance for Doubtful Accounts The Company makes ongoing estimates relating to the collectability of accounts receivable and maintains an allowance for estimated losses resulting from the inability of its customers to make required payments. In determining the amount of the reserve, the Company considers historical levels of credit losses and significant economic developments within the retail environment that could impact the ability of its customers to pay outstanding balances and makes judgments about the creditworthiness of significant customers based on ongoing credit evaluations. Because the Company cannot predict future changes in the financial stability of its customers, actual future losses from uncollectible accounts may differ from estimates. If the financial condition of customers were to deteriorate, resulting in their inability to make payments, a larger reserve might be required. In the event the Company determines a smaller or larger reserve is appropriate, it would record a benefit or charge to selling, general and administrative expense in the period in which such a determination was made. As of December 31, 2015 and 2014, the allowance for doubtful accounts was $5.9 million and $3.7 million, respectively.
Shipping and Handling Costs	Shipping and Handling Costs The Company charges certain customers shipping and handling fees. These fees are recorded in net revenues. The Company includes the majority of outbound handling costs as a component of selling, general and administrative expenses. Outbound handling costs include costs associated with preparing goods to ship to customers and certain costs to operate the Company’s distribution facilities. These costs, included within selling, general and administrative expenses, were $63.7 million, $55.3 million and $46.1 million for the years ended December 31, 2015, 2014 and 2013, respectively. The Company includes outbound freight costs associated with shipping goods to customers as a component of cost of goods sold.
Management Estimates	Management Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates.
Cash and Cash Equivalents, Policy	Cash and Cash Equivalents The Company considers all highly liquid investments with an original maturity of three months or less at date of inception to be cash and cash equivalents. Included in interest expense, net for the years ended December 31, 2015, 2014 and 2013 was interest income of $164.0 thousand, $192.0 thousand and $23.7 thousand, respectively, related to cash and cash equivalents.
Income Tax, Policy	Income Taxes Income taxes are accounted for under the asset and liability method. Deferred income tax assets and liabilities are established for temporary differences between the financial reporting basis and the tax basis of the Company’s assets and liabilities at tax rates expected to be in effect when such assets or liabilities are realized or settled. Deferred income tax assets are reduced by valuation allowances when necessary. Assessing whether deferred tax assets are realizable requires significant judgment. The Company considers all available positive and negative evidence, including historical operating performance and expectations of future operating performance. The ultimate realization of deferred tax assets is often dependent upon future taxable income and therefore can be uncertain. To the extent the Company believes it is more likely than not that all or some portion of the asset will not be realized, valuation allowances are established against the Company’s deferred tax assets, which increase income tax expense in the period when such a determination is made. Income taxes include the largest amount of tax benefit for an uncertain tax position that is more likely than not to be sustained upon audit based on the technical merits of the tax position. Settlements with tax authorities, the expiration of statutes of limitations for particular tax positions, or obtaining new information on particular tax positions may cause a change to the effective tax rate. The Company recognizes accrued interest and penalties related to unrecognized tax benefits in the provision for income taxes on the consolidated statements of income.
Property, Plant and Equipment, Policy	Property and Equipment Property and equipment are stated at cost, including the cost of internal labor for software customized for internal use, less accumulated depreciation and amortization. Property and equipment is depreciated using the straight-line method over the estimated useful lives of the assets: 3 to 10 years for furniture, office equipment, software and plant equipment and 10 to 35 years for site improvements, buildings and building equipment. Leasehold and tenant improvements are amortized over the shorter of the lease term or the estimated useful lives of the assets. The cost of in-store apparel and footwear fixtures and displays are capitalized, included in furniture, fixtures and displays, and depreciated over 3 years. The Company periodically reviews assets’ estimated useful lives based upon actual experience and expected future utilization. A change in useful life is treated as a change in accounting estimate and is applied prospectively. The Company capitalizes the cost of interest for long term property and equipment projects based on the Company’s weighted average borrowing rates in place while the projects are in progress. Capitalized interest was $1.0 million and $0.4 million as of December 31, 2015 and 2014, respectively. Upon retirement or disposition of property and equipment, the cost and accumulated depreciation are removed from the accounts and any resulting gain or loss is reflected in selling, general and administrative expenses for that period. Major additions and betterments are capitalized to the asset accounts while maintenance and repairs, which do not improve or extend the lives of assets, are expensed as incurred.
Accrued Expenses	Accrued Expenses At December 31, 2015, accrued expenses primarily included $63.8 million and $17.8 million of accrued compensation and benefits and marketing expenses, respectively. At December 31, 2014, accrued expenses primarily included $61.4 million and $14.0 million of accrued compensation and benefits and marketing expenses, respectively.
Derivatives, Policy	Derivatives and Hedging Activities The Company uses derivative financial instruments in the form of foreign currency forward and interest rate swap contracts to minimize the risk associated with foreign currency exchange rate and interest rate fluctuations. The Company accounts for derivative financial instruments pursuant to applicable accounting guidance. This guidance establishes accounting and reporting standards for derivative financial instruments and requires all derivatives to be recognized as either assets or liabilities on the balance sheet and to be measured at fair value. Unrealized derivative gain positions are recorded as other current assets or other long term assets, and unrealized derivative loss positions are recorded as accrued expenses or other long term liabilities, depending on the derivative financial instrument’s maturity date. Currently, the majority of the Company’s foreign currency forward contracts are not designated as cash flow hedges, and accordingly, changes in their fair value are included in other expense, net on the consolidated statements of income. During 2014, the Company began entering into foreign currency forward contracts designated as cash flow hedges, and consequently, changes in fair value, excluding any ineffective portion, are recorded in other comprehensive income until net income is affected by the variability in cash flows of the hedged transaction. The effective portion is generally released to net income after the maturity of the related derivative and is classified in the same manner as the underlying exposure. Additionally, the Company has designated its interest rate swap contract as a cash flow hedge and accordingly, the effective portion of changes in fair value are recorded in other comprehensive income and reclassified into interest expense over the life of the underlying debt obligation. The ineffective portion, if any, is recognized in current period earnings. The Company does not enter into derivative financial instruments for speculative or trading purposes.
Revenue Recognition, Policy	Revenue Recognition The Company recognizes revenue pursuant to applicable accounting standards. Net revenues consist of both net sales and license and other revenues. Net sales are recognized upon transfer of ownership, including passage of title to the customer and transfer of risk of loss related to those goods. Transfer of title and risk of loss is based upon shipment under free on board shipping point for most goods or upon receipt by the customer depending on the country of the sale and the agreement with the customer. In some instances, transfer of title and risk of loss takes place at the point of sale, for example, at the Company’s brand and factory house stores. The Company may also ship product directly from its supplier to the customer and recognize revenue when the product is delivered to and accepted by the customer. License and other revenues are primarily recognized based upon shipment of licensed products sold by the Company’s licensees. Sales taxes imposed on the Company’s revenues from product sales are presented on a net basis on the consolidated statements of income and therefore do not impact net revenues or costs of goods sold. The Company records reductions to revenue for estimated customer returns, allowances, markdowns and discounts. The Company bases its estimates on historical rates of customer returns and allowances as well as the specific identification of outstanding returns, markdowns and allowances that have not yet been received by the Company. The actual amount of customer returns and allowances, which is inherently uncertain, may differ from the Company’s estimates. If the Company determines that actual or expected returns or allowances are significantly higher or lower than the reserves it established, it would record a reduction or increase, as appropriate, to net sales in the period in which it makes such a determination. Provisions for customer specific discounts are based on contractual obligations with certain major customers. Reserves for returns, allowances, markdowns and discounts are recorded as an offset to accounts receivable as settlements are made through offsets to outstanding customer invoices. As of December 31, 2015 and 2014, there were $94.5 million and $68.9 million, respectively, in reserves for customer returns, allowances, markdowns and discounts.
Share-based Compensation, Option and Incentive Plans Policy	Stock-Based Compensation The Company accounts for stock-based compensation in accordance with accounting guidance that requires all stock-based compensation awards granted to employees and directors to be measured at fair value and recognized as an expense in the financial statements. In addition, this guidance requires that excess tax benefits related to stock-based compensation awards be reflected as financing cash flows. The Company uses the Black-Scholes option-pricing model to estimate the fair market value of stock-based compensation awards. The Company uses the “simplified method” to estimate the expected life of options, as permitted by accounting guidance. The “simplified method” calculates the expected life of a stock option equal to the time from grant to the midpoint between the vesting date and contractual term, taking into account all vesting tranches. The risk free interest rate is based on the yield for the U.S. Treasury bill with a maturity equal to the expected life of the stock option. Expected volatility is based on the Company's historical average. Compensation expense is recognized net of forfeitures on a straight-line basis over the total vesting period, which is the implied requisite service period. Compensation expense for performance-based awards is recorded over the implied requisite service period when achievement of the performance target is deemed probable. The forfeiture rate is estimated at the date of grant based on historical rates. The Company issues new shares of Class A Common Stock upon exercise of stock options, grant of restricted stock or share unit conversion. Refer to Note 12 for further details on stock-based compensation.
Fair Value of Financial Instruments, Policy	Fair Value of Financial Instruments The carrying amounts shown for the Company’s cash and cash equivalents, accounts receivable and accounts payable approximate fair value because of the short term maturity of those instruments. The fair value of the long term debt approximates its carrying value based on the variable nature of interest rates and current market rates available to the Company. The fair value of foreign currency forward contracts is based on the net difference between the U.S. dollars to be received or paid at the contracts’ settlement date and the U.S. dollar value of the foreign currency to be sold or purchased at the current forward exchange rate. The fair value of the interest rate swap contract is based on the net difference between the fixed interest to be paid and variable interest to be received over the term of the contract based on current market rates.
New Accounting Pronouncements, Policy	Recently Issued Accounting Standards In May 2014, the FASB issued an Accounting Standards Update which supersedes the most current requirements. The new revenue recognition standard requires entities to recognize revenue in a way that depicts the transfer of goods or services to customers in an amount that reflects the consideration which the entity expects to be entitled to in exchange for those goods or services. This guidance was previously effective for annual and interim reporting periods beginning after December 15, 2016, with early adoption not permitted. In August 2015, the FASB issued a one-year deferral of the effective date of the new revenue recognition standard. The new standard will now be effective for annual and interim periods beginning after December 15, 2017 with early adoption as of the original effective date permitted. The Company is currently evaluating this standard to determine the impact of its adoption on the consolidated financial statements. In July 2015, the FASB issued an Accounting Standard Update which simplifies the measurement of inventory by requiring certain inventory to be measured at the lower of cost or net realizable value. This guidance is effective for fiscal years beginning after December 15, 2016 and for interim periods therein. The Company does not expect the adoption of this standard to have a significant impact on the consolidated financial statements. In September 2015, the FASB issued an Accounting Standards Update which requires the acquiring company in a business combination to recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. The amendments in this Update require that the acquiring company record, in the same period’s financial statements, the effect on earnings of changes in depreciation, amortization, or other income effects, if any, as a result of a change to the provisional amounts, calculated as if the accounting had been completed at the acquisition date. This guidance is effective for fiscal years beginning after December 15, 2015 and for interim periods therein. The Company does not expect the adoption of this standard to have a significant impact on the consolidated financial statements. Recently Adopted Accounting Standards In January 2015, the FASB issued an Accounting Standards Update which eliminates from GAAP the concept of extraordinary items and the need to separately classify, present, and disclose extraordinary events and transactions. This guidance is effective for annual and interim reporting periods beginning after December 15, 2015, with early adoption permitted provided that the guidance is applied from the beginning of the fiscal year of adoption. The adoption of this pronouncement did not have a material impact on the consolidated financial statements. In November 2015, the FASB issued an Accounting Standards Update which requires deferred tax liabilities and assets to be classified as non-current in a classified statement of financial position. The guidance is effective for financial statements issued for annual periods beginning after December 15, 2017, and interim periods within annual periods beginning after December 15, 2018. Earlier adoption is permitted for all entities as of the beginning of an interim or annual reporting period. This amendment may be applied either prospectively or retrospectively to all periods presented. The Company adopted the provisions of this guidance prospectively in the fourth quarter of 2015, and did not retrospectively adjust the prior periods. Had the Company adopted this guidance retrospectively, $33.5 million would have been reclassified from deferred income taxes-current to deferred income taxes-long term for the year ended December 31, 2014. The adoption of this guidance will simplify the presentation of deferred income taxes and reduce complexity without decreasing the usefulness of information provided to users of financial statements. The adoption of this pronouncement did not have a significant impact on the Company's financial position, results of operations and cash flows.

Acquisitions Schedule of Recognized Identified Assets Acquired and Liabilities Assumed (Tables)

12 Months Ended

Dec. 31, 2015

Business Acquisition [Line Items]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]

The following table summarizes the allocation of estimated fair values of the net assets acquired, including the related estimated useful lives, where applicable:



	MyFitnessPal				Endomondo
	(in thousands)			Useful life (in years)	(in thousands)			Useful life (in years)
	(in thousands)			Useful life (in years)	(in thousands)			Useful life (in years)
Finite-lived intangible assets:
User base	$	38,300		10	$	10,600		10
Nutrition database	4,500			10	—			N/A
Technology	3,200			5	5,000			5
Trade name	2,300			5	400			5
Other assets acquired	16,190				3,738
Liabilities assumed	(3,291		)		(2,784		)
Net assets acquired	61,199				16,954
Goodwill	402,728				70,290
Total fair value of consideration	$	463,927			$	87,244

Property And Equipment, Net (Tables)

12 Months Ended

Dec. 31, 2015

Property, Plant and Equipment [Abstract]

Components of Property and Equipment

Property and equipment consisted of the following:



	December 31,
(In thousands)	2015			2014
Leasehold and tenant improvements	$	214,834		$	128,088
Furniture, fixtures and displays	132,736			80,035
Buildings	47,137			46,419
Software	99,309			67,506
Office equipment	50,399			51,531
Plant equipment	118,138			70,317
Land	17,628			17,628
Construction in progress	147,581			57,677
Other	4,002			3,175
Subtotal property and equipment	831,764			522,376
Accumulated depreciation	(293,233		)	(216,812		)
Property and equipment, net	$	538,531		$	305,564

Goodwill and Intangible Assets, Net (Tables)

12 Months Ended

Dec. 31, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The following table summarizes changes in the carrying amount of the Company’s goodwill by reportable segment as of the periods indicated:



(In thousands)	North America			Connected Fitness			International			Total
Balance as of December 31, 2014	$	119,799		$	2,445		$	1,012		$	123,256
Goodwill acquired	198,417			26,217			248,724			473,358
Effect of currency translation adjustment	(1,363		)	(1,302		)	(8,768		)	(11,433		)
Balance as of December 31, 2015	$	316,853		$	27,360		$	240,968		$	585,181

Summary Of Intangible Assets

The following table summarizes the Company’s intangible assets as of the periods indicated:



		December 31, 2015							December 31, 2014
(In thousands)	Useful Lives from Date of Acquisitions (in years)	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Intangible assets subject to amortization:
User base	10	$	47,922	$	(3,965	)	$	43,957	$	—	$	—		$	—
Technology	5-7	19,739		(5,041		)	14,698		12,000		(1,907		)	10,093
Customer relationships	2-3	10,738		(8,354		)	2,384		11,927		(4,692		)	7,235
Trade name	4-5	7,663		(3,036		)	4,627		5,000		(1,353		)	3,647
Nutrition database	10	4,500		(356		)	4,144		—		—			—
Lease-related intangible assets	1-15	3,896		(2,919		)	977		3,896		(2,762		)	1,134
Other	5-10	1,385		(444		)	941		2,196		(893		)	1,303
Total		$	95,843	$	(24,115	)	$	71,728	$	35,019	$	(11,607	)	$	23,412
Indefinite-lived intangible assets							3,958							2,818
Intangible assets, net							$	75,686						$	26,230

Commitments And Contingencies (Tables)

12 Months Ended

Dec. 31, 2015

Commitments and Contingencies Disclosure [Abstract]

Future Minimum Lease Payments For Non-Cancelable Real Property Operating Leases

The following is a schedule of future minimum lease payments for non-cancelable real property operating leases as of December 31, 2015 as well as significant operating lease agreements entered into during the period after December 31, 2015 through the date of this report:



(In thousands)
2016	$	84,620
2017	84,566
2018	81,912
2019	77,332
2020	73,808
2021 and thereafter	314,836
Total future minimum lease payments	$	717,074

Future Minimum Payments Under Sponsorship And Other Marketing Agreements

The following is a schedule of the Company’s future minimum payments under its sponsorship and other marketing agreements as of December 31, 2015, as well as significant sponsorship and other marketing agreements entered into during the period after December 31, 2015 through the date of this report:



(In thousands)
2016	$	126,488
2017	138,607
2018	137,591
2019	98,486
2020	67,997
2021 and thereafter	289,374
Total future minimum sponsorship and other payments	$	858,543

Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2015

Text Block [Abstract]

Financial Assets and (Liabilities) Measured at Fair Value

Financial assets and (liabilities) measured at fair value are set forth in the table below:



	December 31, 2015							December 31, 2014
(In thousands)	Level 1		Level 2			Level 3		Level 1		Level 2			Level 3
Derivative foreign currency contracts (see Note 14)	$	—	$	3,811		$	—	$	—	$	806		$	—
Interest rate swap contracts (see Note 14)	—		(1,486		)	—		—		(607		)	—
TOLI policies held by the Rabbi Trust (see Note 13)	—		4,456			—		—		4,734			—
Deferred Compensation Plan obligations (see Note 13)	—		(5,072		)	—		—		(4,525		)	—
Available-for-sale securities	6,534		—			—		—		—			—

Provision For Income Taxes Schedule of Components of Income Tax Expense (Benefit) (Tables)

12 Months Ended

Dec. 31, 2015

Schedule of Income before Income Tax [Abstract]

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]



	Year Ended December 31,
(In thousands)	2015		2014		2013
Income before income taxes:
United States	$	272,739	$	269,503	$	196,558
Foreign	113,946		72,707		64,435
Total	$	386,685	$	342,210	$	260,993

The components of the provision for income taxes consisted of the following:



	Year Ended December 31,
(In thousands)	2015			2014			2013
Current
Federal	$	102,317		$	110,439		$	85,542
State	27,500			24,419			19,130
Other foreign countries	28,336			16,489			13,295
	158,153			151,347			117,967
Deferred
Federal	707			(15,368		)	(14,722		)
State	(5,703		)	(4,073		)	(5,541		)
Other foreign countries	955			2,262			959
	(4,041		)	(17,179		)	(19,304		)
Provision for income taxes	$	154,112		$	134,168		$	98,663

Provision For Income Taxes Schedule of Effective Income Tax Rate Reconciliation (Tables)

12 Months Ended

Dec. 31, 2015

Schedule of Income before Income Tax [Abstract]

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

A reconciliation from the U.S. statutory federal income tax rate to the effective income tax rate is as follows:



	Year Ended December 31,
	2015		2014		2013
U.S. federal statutory income tax rate	35.0	%	35.0	%	35.0	%
State taxes, net of federal tax impact	3.2		3.8		2.4
Unrecognized tax benefits	3.4		1.9		2.5
Nondeductible expenses	2.2		1.0		1.1
Foreign rate differential	(5.5	)	(4.5	)	(4.8	)
Foreign valuation allowance	2.7		2.5		1.5
Other	(1.1	)	(0.5	)	0.1
Effective income tax rate	39.9	%	39.2	%	37.8	%

Provision For Income Taxes Schedule of Deferred Tax Assets and Liabilities (Tables)

12 Months Ended

Dec. 31, 2015

Schedule of Income before Income Tax [Abstract]

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

Deferred tax assets and liabilities consisted of the following:



	December 31,
(In thousands)	2015			2014
Deferred tax asset
Stock-based compensation	$	40,406		$	35,161
Allowance for doubtful accounts and other reserves	33,821			24,774
Accrued expenses	19,999			11,398
Foreign net operating loss carryforward	19,600			16,302
Deferred rent	13,991			11,005
Inventory obsolescence reserves	11,956			8,198
Tax basis inventory adjustment	10,019			5,845
U. S. net operating loss carryforward	9,217			4,733
Foreign tax credits	6,151			5,131
State tax credits, net of federal tax impact	4,966			4,245
Deferred compensation	2,080			1,858
Other	6,346			4,592
Total deferred tax assets	178,552			133,242
Less: valuation allowance	(24,043		)	(15,550		)
Total net deferred tax assets	154,509			117,692
Deferred tax liability
Property, plant and equipment	(31,069		)	(17,638		)
Intangible assets	(22,820		)	(7,010		)
Prepaid expenses	(8,766		)	(6,424		)
Other	(627		)	(612		)
Total deferred tax liabilities	(63,282		)	(31,684		)
Total deferred tax assets, net	$	91,227		$	86,008

Provision For Income Taxes Summary of income Tax Contingencies (Tables)

12 Months Ended

Dec. 31, 2015

Schedule of Income before Income Tax [Abstract]

Summary of Income Tax Contingencies [Table Text Block]

The following table represents a reconciliation of the Company's total unrecognized tax benefits balances, excluding interest and penalties, for the years ended December 31, 2015, 2014 and 2013:



	Year Ended December 31,
(In thousands)	2015			2014			2013
Beginning of year	$	28,353		$	21,712		$	15,297
Increases as a result of tax positions taken in a prior period	203			250			—
Decreases as a result of tax positions taken in a prior period	—			—			—
Increases as a result of tax positions taken during the current period	14,382			8,947			7,526
Decreases as a result of tax positions taken during the current period	—			—			—
Decreases as a result of settlements during the current period	—			—			—
Reductions as a result of a lapse of statute of limitations during the current period	(327		)	(2,556		)	(1,111		)
End of year	$	42,611		$	28,353		$	21,712

Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2015

Share-based Compensation, Allocation and Classification in Financial Statements [Abstract]

Schedule of Share-based Payment Award, Valuation Assumptions

The fair value of each stock option granted is estimated on the date of grant using the Black-Scholes option-pricing model with the following weighted average assumptions:



	Year Ended December 31,
	2015		2014		2013
Risk-free interest rate	1.8	%	—	%	1.2	%
Average expected life in years	6.00		0		6.25
Expected volatility	44.3	%	—	%	55.4	%
Expected dividend yield	—	%	—	%	—	%

Summary Of Stock Options Activity

A summary of the Company’s stock options as of December 31, 2015, 2014 and 2013, and changes during the years then ended is presented below:



(In thousands, except per share amounts)	Year Ended December 31,
(In thousands, except per share amounts)	2015				2014				2013
	Number of Stock Options		Weighted Average Exercise Price		Number of Stock Options		Weighted Average Exercise Price		Number of Stock Options		Weighted Average Exercise Price
Outstanding, beginning of year	2,811		$	8.28	4,272		$	8.11	6,298		$	7.66
Granted, at fair market value	579		40.30		—		—		20		24.35
Exercised	(360	)	7.92		(1,454	)	7.74		(1,822	)	6.68
Expired	—		—		—		—		—		—
Forfeited	(26	)	4.53		(7	)	16.46		(224	)	8.41
Outstanding, end of year	3,004		$	14.52	2,811		$	8.28	4,272		$	8.11
Options exercisable, end of year	2,446		$	8.26	2,707		$	7.87	2,346		$	7.80

Stock Options Outstanding And Exercisable

The following table summarizes information about stock options outstanding and exercisable as of December 31, 2015:

(In thousands, except per share amounts)



Options Outstanding						Options Exercisable
Number of Underlying Shares	Weighted Average Exercise Price Per Share		Weighted Average Remaining Contractual Life (Years)	Total Intrinsic Value		Number of Underlying Shares	Weighted Average Exercise Price Per Share		Weighted Average Remaining Contractual Life (Years)	Total Intrinsic Value
3,004	$	14.52	4.91	$	198,535	2,446	$	8.26	4.05	$	176,973

Summary Of Restricted Stock And Restricted Stock Units

A summary of the Company’s restricted stock and restricted stock units as of December 31, 2015, 2014 and 2013, and changes during the years then ended is presented below:



	Year Ended December 31,
(In thousands, except per share amounts)	2015				2014				2013
	Number of Restricted Shares		Weighted Average Fair Value		Number of Restricted Shares		Weighted Average Fair Value		Number of Restricted Shares		Weighted Average Fair Value
Outstanding, beginning of year	4,510		$	30.42	5,244		$	22.19	4,514		$	19.51
Granted	1,015		76.72		1,061		54.17		1,682		26.35
Forfeited	(326	)	48.57		(958	)	20.98		(410	)	17.37
Vested	(1,819	)	23.22		(837	)	19.49		(542	)	16.76
Outstanding, end of year	3,380		$	46.45	4,510		$	30.42	5,244		$	22.19

Risk Management and Derivatives (Tables)

12 Months Ended

Dec. 31, 2015

Text Block [Abstract]

Changes in Foreign Currency Exchange Rates and Derivative Foreign Currency Forward Contracts

Included in other expense, net were the following amounts related to changes in foreign currency exchange rates and derivative foreign currency forward contracts:



(In thousands)	Year Ended December 31,
(In thousands)	2015			2014			2013
Unrealized foreign currency exchange rate gains (losses)	$	(33,359	)	$	(11,739	)	$	(1,905	)
Realized foreign currency exchange rate gains (losses)	7,643			2,247			477
Unrealized derivative gains (losses)	388			1			13
Realized derivative gains (losses)	16,404			3,081			243

- Definition

The entire disclosure for foreign currency transactions and translation. This may include description of foreign currency transactions, foreign currency gains and losses, explanation of change in cumulative translation adjustment, description of effect of subsequent foreign currency exchange rate change, cumulative translation adjustment movement, foreign currency translation adjustment by component movement, translation adjustment for net investment hedge movement, adjustment for long-term intercompany transactions, schedule of long-term intercompany balances and any other foreign currency transactions and translation related items.

+ References + Details

Segment Data and Related Information (Tables)

12 Months Ended

Dec. 31, 2015

Text Block [Abstract]

Reconciliation of Revenue from Segments to Consolidated



(In thousands)	Year Ended December 31,
(In thousands)	2015		2014		2013
Net revenues
North America	$	3,455,737	$	2,796,374	$	2,193,739
International	454,161		268,771		137,244
Connected Fitness	53,415		19,225		1,068
Total net revenues	$	3,963,313	$	3,084,370	$	2,332,051

Reconciliation of Operating Profit (Loss) from Segments to Consolidated



(In thousands)	Year Ended December 31,
(In thousands)	2015			2014			2013
Operating income (loss)
North America	$	460,961		$	379,814		$	271,338
International	8,887			(5,190		)	(5,706		)
Connected Fitness	(61,301		)	(20,669		)	(534		)
Total operating income	408,547			353,955			265,098
Interest expense, net	(14,628		)	(5,335		)	(2,933		)
Other expense, net	(7,234		)	(6,410		)	(1,172		)
Income before income taxes	$	386,685		$	342,210		$	260,993

Net Revenues by Product Category

Net revenues by product category are as follows:



(In thousands)	Year Ended December 31,
(In thousands)	2015		2014		2013
Apparel	$	2,801,062	$	2,291,520	$	1,762,150
Footwear	677,744		430,987		298,825
Accessories	346,885		275,409		216,098
Total net sales	3,825,691		2,997,916		2,277,073
Licensing revenues	84,207		67,229		53,910
Connected Fitness	53,415		19,225		1,068
Total net revenues	$	3,963,313	$	3,084,370	$	2,332,051

Unaudited Quarterly Financial Data (Tables)

12 Months Ended

Dec. 31, 2015

Quarterly Financial Data [Abstract]

Selected Quarterly Financial Data



(In thousands)	Quarter Ended (unaudited)								Year Ended December 31,
(In thousands)	March 31,		June 30,		September 30,		December 31,		Year Ended December 31,
2015
Net revenues	$	804,941	$	783,577	$	1,204,109	$	1,170,686	$	3,963,313
Gross profit	377,664		379,053		587,160		561,670		1,905,547
Income from operations	27,667		31,901		171,397		177,582		408,547
Net income	11,728		14,766		100,477		105,602		232,573
Earnings per share-basic	$	0.05	$	0.07	$	0.47	$	0.49	$	1.08
Earnings per share-diluted	$	0.05	$	0.07	$	0.45	$	0.48	$	1.05
2014
Net revenues	$	641,607	$	609,654	$	937,908	$	895,201	$	3,084,370
Gross profit	300,690		299,952		465,300		446,264		1,512,206
Income from operations	26,856		34,694		146,106		146,299		353,955
Net income	13,538		17,690		89,105		87,709		208,042
Earnings per share-basic	$	0.06	$	0.08	$	0.42	$	0.41	$	0.98
Earnings per share-diluted	$	0.06	$	0.08	$	0.41	$	0.40	$	0.95

Summary of Significant Accounting Policies (Narrative) (Detail) ¥ in Millions		3 Months Ended	6 Months Ended	12 Months Ended
	Apr. 14, 2014 shares	Mar. 31, 2015 USD ($)	Jun. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2011	Mar. 17, 2015	Jan. 05, 2015	Jan. 31, 2011 JPY (¥)	Jan. 31, 2011 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Stock Issued During Period, Shares, Stock Splits \| shares	1.00
Interest and Dividend Income, Securities, Operating, Trading or Measured at Fair Value				$ 164,000	$ 192,000	$ 23,700
Allowance for doubtful accounts receivable				5,900,000	3,700,000
Interest Costs Capitalized				1,000,000	400,000
Accrued liabilities accrued compensation and benefits				63,800,000	61,400,000
Accrued Liabilities Accrued Marketing Expenses				17,800,000	14,000,000
Reserves For Customer Returns Allowances Markdowns And Discounts				94,500,000	68,900,000
Advertising Expense				417,800,000	333,000,000	246,500,000
Prepaid Advertising				37,500,000	31,100,000
Shipping and handling costs				63,700,000	55,300,000	46,100,000
Cost Method Investments				12,000,000	13,400,000
Payments to Acquire Available-for-sale Securities		$ 10,400,000	$ 41,500,000	103,144,000	0	0
Proceeds from Sale of Available-for-sale Securities, Equity		3,300,000	19,400,000	96,610,000	0	$ 0
Accounts receivable, net				$ 433,638,000	$ 279,835,000
Dome Corporation
Summary Of Significant Accounting Policies [Line Items]
Ownership Percentage Cost Method Investment							19.50%
Furniture Office Equipment And Software \| Minimum
Summary Of Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life				3 years
Furniture Office Equipment And Software \| Maximum
Summary Of Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life				10 years
Site Improvement Buildings And Building Equipment \| Minimum
Summary Of Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life				10 years
Site Improvement Buildings And Building Equipment \| Maximum
Summary Of Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life				35 years
Fixtures And Displays
Summary Of Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life				3 years
Japan, Yen \| Dome Corporation
Summary Of Significant Accounting Policies [Line Items]
Cost Method Investments \| ¥										¥ 1,140.0
United States of America, Dollars \| Dome Corporation
Summary Of Significant Accounting Policies [Line Items]
Cost Method Investments											$ 15,500,000
Customer A Concentration Risk [Member] \| Accounts Receivable [Member]
Summary Of Significant Accounting Policies [Line Items]
Concentration Credit Risk, Percentage				18.70%	23.40%
Customer A Concentration Risk [Member] \| Sales Revenue, Goods, Net [Member]
Summary Of Significant Accounting Policies [Line Items]
Concentration Risk, Percentage				11.50%	14.40%	16.60%
The Sports Authority [Member]
Summary Of Significant Accounting Policies [Line Items]
Accounts receivable, net				$ 32,500,000
Endomondo [Member]
Summary Of Significant Accounting Policies [Line Items]
Equity Interest in Acquiree, Percentage									100.00%
MyFitnessPal [Member]
Summary Of Significant Accounting Policies [Line Items]
Equity Interest in Acquiree, Percentage								100.00%
Cash and Cash Equivalents [Member] \| Prepaid Expenses and Other Current Assets [Member]
Summary Of Significant Accounting Policies [Line Items]
Prior Period Reclassification Adjustment		$ 7,100,000	$ 22,100,000
Deferred Income Taxes Current [Member] \| Deferred Income Taxes Long Term [Member]
Summary Of Significant Accounting Policies [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets					$ 33,500,000

Acquisitions Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
Acquisitions Narrative (Details) - USD ($) $ in Thousands	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Mar. 17, 2015	Jan. 05, 2015
Business Acquisition [Line Items]
Proceeds from revolving credit facility			$ 500,000	$ 0	$ 100,000
Goodwill, Acquired During Period			473,358
Finite-Lived Intangible Assets, Gross		$ 35,019	95,843	35,019
Goodwill		123,256	585,181	123,256
Customer Lists [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Gross		0	$ 47,922	0
Finite-Lived Intangible Asset, Useful Life			10 years
Technology-Based Intangible Assets [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Gross		12,000	$ 19,739	12,000
Trade Names [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Gross		5,000	7,663	5,000
Customer Relationships [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Gross		11,927	10,738	11,927
Nutrition Database [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Gross		0	$ 4,500	$ 0
Finite-Lived Intangible Asset, Useful Life			10 years
Minimum \| Technology-Based Intangible Assets [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life			5 years
Minimum \| Trade Names [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life			4 years
Minimum \| Customer Relationships [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life			2 years
Maximum \| Technology-Based Intangible Assets [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life			7 years
Maximum \| Trade Names [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life			5 years
Maximum \| Customer Relationships [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life			3 years
Endomondo [Member]
Business Acquisition [Line Items]
Equity Interest in Acquiree, Percentage							100.00%
Payments to Acquire Businesses							$ 85,000
Acquisitions Related Costs	$ 600	$ 800
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net							87,244
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets							3,738
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities							(2,784)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill							16,954
Goodwill							70,290
Endomondo [Member] \| Customer Lists [Member]
Business Acquisition [Line Items]
Finite-Lived Intangibles Acquired							10,600
Finite-Lived Intangible Asset, Useful Life			10 years
Endomondo [Member] \| Technology-Based Intangible Assets [Member]
Business Acquisition [Line Items]
Finite-Lived Intangibles Acquired							5,000
Finite-Lived Intangible Asset, Useful Life			5 years
Endomondo [Member] \| Trade Names [Member]
Business Acquisition [Line Items]
Finite-Lived Intangibles Acquired							400
Finite-Lived Intangible Asset, Useful Life			5 years
Endomondo [Member] \| Nutrition Database [Member]
Business Acquisition [Line Items]
Finite-Lived Intangibles Acquired							$ 0
MyFitnessPal [Member]
Business Acquisition [Line Items]
Equity Interest in Acquiree, Percentage						100.00%
Proceeds from revolving credit facility	400,000
Acquisitions Related Costs	$ 5,700
Transaction Value						$ 474,000
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net						463,927
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets						16,190
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities						(3,291)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill						61,199
Goodwill						402,728
MyFitnessPal [Member] \| Customer Lists [Member]
Business Acquisition [Line Items]
Finite-Lived Intangibles Acquired						38,300
Finite-Lived Intangible Asset, Useful Life			10 years
MyFitnessPal [Member] \| Technology-Based Intangible Assets [Member]
Business Acquisition [Line Items]
Finite-Lived Intangibles Acquired						3,200
Finite-Lived Intangible Asset, Useful Life			5 years
MyFitnessPal [Member] \| Trade Names [Member]
Business Acquisition [Line Items]
Finite-Lived Intangibles Acquired						2,300
Finite-Lived Intangible Asset, Useful Life			5 years
MyFitnessPal [Member] \| Nutrition Database [Member]
Business Acquisition [Line Items]
Finite-Lived Intangibles Acquired						$ 4,500
Finite-Lived Intangible Asset, Useful Life			10 years

Acquisitions Business Acquisition, Proforma (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Business Acquisition, Pro Forma Revenue	$ 3,967,008	$ 3,098,341
Business Acquisition, Pro Forma Net Income (Loss)	$ 231,277	$ 189,659

Acquisitions Goodwill Allocation (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Mar. 17, 2015	Jan. 05, 2015	Dec. 31, 2014
Business Combination Segment Allocation [Line Items]
Goodwill	$ 585,181			$ 123,256
North America [Member]
Business Combination Segment Allocation [Line Items]
Goodwill	316,853			119,799
Connected Fitness [Member]
Business Combination Segment Allocation [Line Items]
Goodwill	$ 27,360			$ 2,445
Endomondo [Member]
Business Combination Segment Allocation [Line Items]
Goodwill			$ 70,290
Endomondo [Member] \| North America [Member]
Business Combination Segment Allocation [Line Items]
Goodwill			14,253
Endomondo [Member] \| EMEA [Member]
Business Combination Segment Allocation [Line Items]
Goodwill			29,452
Endomondo [Member] \| Asia Pacific [Member]
Business Combination Segment Allocation [Line Items]
Goodwill			11,446
Endomondo [Member] \| Latin America [Member]
Business Combination Segment Allocation [Line Items]
Goodwill			988
Endomondo [Member] \| Connected Fitness [Member]
Business Combination Segment Allocation [Line Items]
Goodwill			$ 14,151
MyFitnessPal [Member]
Business Combination Segment Allocation [Line Items]
Goodwill		$ 402,728
MyFitnessPal [Member] \| North America [Member]
Business Combination Segment Allocation [Line Items]
Goodwill		183,817
MyFitnessPal [Member] \| EMEA [Member]
Business Combination Segment Allocation [Line Items]
Goodwill		81,300
MyFitnessPal [Member] \| Asia Pacific [Member]
Business Combination Segment Allocation [Line Items]
Goodwill		70,266
MyFitnessPal [Member] \| Latin America [Member]
Business Combination Segment Allocation [Line Items]
Goodwill		55,275
MyFitnessPal [Member] \| Connected Fitness [Member]
Business Combination Segment Allocation [Line Items]
Goodwill		$ 12,070

Property And Equipment, Net (Components Of Property And Equipment) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property and equipment	$ 831,764	$ 522,376
Accumulated depreciation	(293,233)	(216,812)
Property and equipment, net	538,531	305,564
Leasehold and tenant improvements
Property, Plant and Equipment [Line Items]
Property and equipment	214,834	128,088
Furniture, fixtures and displays
Property, Plant and Equipment [Line Items]
Property and equipment	132,736	80,035
Buildings
Property, Plant and Equipment [Line Items]
Property and equipment	47,137	46,419
Software
Property, Plant and Equipment [Line Items]
Property and equipment	99,309	67,506
Office equipment
Property, Plant and Equipment [Line Items]
Property and equipment	50,399	51,531
Plant equipment
Property, Plant and Equipment [Line Items]
Property and equipment	118,138	70,317
Land
Property, Plant and Equipment [Line Items]
Property and equipment	17,628	17,628
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment	147,581	57,677
Other
Property, Plant and Equipment [Line Items]
Property and equipment	$ 4,002	$ 3,175

Property And Equipment, Net (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 100,940	$ 72,093	$ 50,549
Property And Equipment [Member]
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 87,100	$ 63,600	$ 48,300

Goodwill and Intangible Assets, Net - Schedule of Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2015
Goodwill [Roll Forward]
Goodwill	$ 123,256
Goodwill, Acquired During Period	473,358
Goodwill	123,256	$ 585,181
Goodwill, Translation Adjustments	(11,433)
North America [Member]
Goodwill [Roll Forward]
Goodwill	119,799
Goodwill, Acquired During Period	198,417
Goodwill	119,799	316,853
Goodwill, Translation Adjustments	(1,363)
Connected Fitness [Member]
Goodwill [Roll Forward]
Goodwill	2,445
Goodwill, Acquired During Period	26,217
Goodwill	2,445	27,360
Goodwill, Translation Adjustments	(1,302)
Other Foreign Countries [Member]
Goodwill [Roll Forward]
Goodwill	1,012
Goodwill, Acquired During Period	248,724
Goodwill	1,012	$ 240,968
Goodwill, Translation Adjustments	$ (8,768)

Goodwill and Intangible Assets, Net - Summary Of Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Carrying Amount	$ 95,843	$ 35,019
Intangible assets, Accumulated Amortization	(24,115)	(11,607)
Intangible assets, Net Carrying Amount	71,728	23,412
Indefinite-lived intangible assets	3,958	2,818
Intangible assets, net	$ 75,686	26,230
Customer Lists [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	10 years
Intangible assets, Gross Carrying Amount	$ 47,922	0
Intangible assets, Accumulated Amortization	(3,965)	0
Intangible assets, Net Carrying Amount	43,957	0
Technology-Based Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Carrying Amount	19,739	12,000
Intangible assets, Accumulated Amortization	(5,041)	(1,907)
Intangible assets, Net Carrying Amount	14,698	10,093
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Carrying Amount	7,663	5,000
Intangible assets, Accumulated Amortization	(3,036)	(1,353)
Intangible assets, Net Carrying Amount	$ 4,627	3,647
Nutrition Database [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	10 years
Intangible assets, Gross Carrying Amount	$ 4,500	0
Intangible assets, Accumulated Amortization	(356)	0
Intangible assets, Net Carrying Amount	4,144	0
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Carrying Amount	10,738	11,927
Intangible assets, Accumulated Amortization	(8,354)	(4,692)
Intangible assets, Net Carrying Amount	2,384	7,235
Lease-related intangible assets
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Carrying Amount	3,896	3,896
Intangible assets, Accumulated Amortization	(2,919)	(2,762)
Intangible assets, Net Carrying Amount	977	1,134
Other
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Carrying Amount	1,385	2,196
Intangible assets, Accumulated Amortization	(444)	(893)
Intangible assets, Net Carrying Amount	$ 941	$ 1,303
Minimum \| Technology-Based Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	5 years
Minimum \| Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	4 years
Minimum \| Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	2 years
Minimum \| Lease-related intangible assets
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	1 year
Minimum \| Other
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	5 years
Maximum \| Technology-Based Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	7 years
Maximum \| Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	5 years
Maximum \| Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	3 years
Maximum \| Lease-related intangible assets
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	15 years
Maximum \| Other
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	10 years

Goodwill and Intangible Assets, Net - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Goodwill, Acquired During Period	$ 473,358
Amortization expense	13,900	$ 8,500	$ 2,100
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	13,023
Estimated Amortization of Intangible Assets, 2015	10,530
Estimated Amortization of Intangible Assets, 2016	9,367
Estimated Amortization of Intangible Assets, 2017	9,260
Estimated Amortization of Intangible Assets, 2018	$ 7,256
Minimum \| Technology-Based Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life of intangible assets	5 years
Minimum \| Lease-related intangible assets
Finite-Lived Intangible Assets [Line Items]
Estimated useful life of intangible assets	1 year
Minimum \| Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life of intangible assets	4 years
Minimum \| Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life of intangible assets	2 years
Maximum \| Technology-Based Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life of intangible assets	7 years
Maximum \| Lease-related intangible assets
Finite-Lived Intangible Assets [Line Items]
Estimated useful life of intangible assets	15 years
Maximum \| Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life of intangible assets	5 years
Maximum \| Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life of intangible assets	3 years

Goodwill and Intangible Assets, Net Finite-Lived Intangible Assets, Estimated Future Amortization Expense (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangibles Assets, Estimated Future Amortization Expense [Line Items]
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	$ 13,023
Finite-Lived Intangible Assets, Amortization Expense, Year Two	10,530
Finite-Lived Intangible Assets, Amortization Expense, Year Three	9,367
Finite-Lived Intangible Assets, Amortization Expense, Year Four	9,260
Finite-Lived Intangible Assets, Amortization Expense, Year Five	7,256
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	22,292
Finite-Lived Intangible Assets, Net	$ 71,728	$ 23,412

Credit Facility and Long Term Debt - Additional Information (Detail) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		12 Months Ended
	Dec. 31, 2012	Mar. 31, 2016	Jun. 30, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Feb. 19, 2016	Jan. 22, 2016	Mar. 31, 2015
Debt Disclosure [Line Items]
Letters of Credit Outstanding, Amount				$ 1,000
Commitment fee as percentage of the committed line amount less outstanding borrowings and letters of credit				1500.00%
Long term debt agreements principal outstanding					$ 2,000	$ 4,900
Weighted Average Interest Rate				3.30%	3.10%	3.30%
Long-term Line of Credit, Noncurrent				$ 275,000	$ 0					$ 350,000
Line of Credit Facility, Remaining Borrowing Capacity				525,000
Line of Credit Facility, Unused Borrowing Capacity				300,000
Repayments of Long-term Debt				3,952	4,972	$ 5,471
Interest expense				14,600	5,300	2,900
Proceeds from revolving credit facility				500,000	0	100,000
Payments on revolving credit facility				225,000	$ 100,000	$ 0
Deferred Finance Costs, Net				$ 2,900
LIBOR Rate [Member]
Debt Disclosure [Line Items]
Interest rate margin, minimum				1.00%
Interest rate margin, maximum				1.25%
Prime Rate [Member]
Debt Disclosure [Line Items]
Interest rate margin, minimum				0.00%
Interest rate margin, maximum				0.25%
Revolving Credit Facility [Member]
Debt Disclosure [Line Items]
Weighted Average Interest Rate				1.33%
Long-term Line of Credit, Noncurrent								$ 565,000
Term Loan Facility [Member]
Debt Disclosure [Line Items]
Weighted Average Interest Rate					1.16%
Repayments of Debt		$ 150,000
Term Loan Facility [Member] \| Minimum
Debt Disclosure [Line Items]
Weighted Average Interest Rate				1.29%
Term Loan Facility [Member] \| Maximum
Debt Disclosure [Line Items]
Weighted Average Interest Rate				1.32%
Swingline Loan [Member]
Debt Disclosure [Line Items]
Credit facility maximum borrowing capacity				$ 50,000
Letter of Credit [Member]
Debt Disclosure [Line Items]
Credit facility maximum borrowing capacity				$ 50,000
Secured Debt [Member]
Debt Disclosure [Line Items]
Debt Facility Term Period	7 years
Weighted Average Interest Rate				1.70%	1.70%	1.70%
Debt Instrument, Maturity Date	Dec. 01, 2019
Secured Debt	$ 50,000			$ 44,000	$ 46,000	$ 48,000	$ 50,000
Secured Debt [Member] \| LIBOR Rate [Member]
Debt Disclosure [Line Items]
Debt Instrument, Basis Spread on Variable Rate							1.50%
Interest Expense [Member]
Debt Disclosure [Line Items]
Line of Credit Facility, Covenant Terms				1.00
EBITDA [Member]
Debt Disclosure [Line Items]
Line of Credit Facility, Covenant Terms				3.50
Debt [Member]
Debt Disclosure [Line Items]
Line of Credit Facility, Covenant Terms				3.25
EBITDA [Member]
Debt Disclosure [Line Items]
Line of Credit Facility, Covenant Terms				1.00
Interest Rate Swap [Member]
Debt Disclosure [Line Items]
Derivative, Gain (Loss) on Derivative, Net				$ 2,700	$ 1,700
May 2014 Credit Agreement [Member] \| Revolving Credit Facility [Member]
Debt Disclosure [Line Items]
Credit facility maximum borrowing capacity			$ 650,000
Debt Instrument, Term			5 years
Debt Instrument, Maturity Date			May 01, 2019
March 2015 Credit Agreement [Member] \| Revolving Credit Facility [Member]
Debt Disclosure [Line Items]
Credit facility maximum borrowing capacity										800,000
Line of Credit Facility, Additional Borrowing										$ 150,000
January 2016 Credit Agreement [Member] \| Revolving Credit Facility [Member]
Debt Disclosure [Line Items]
Credit facility maximum borrowing capacity									$ 1,250,000
Debt Instrument, Maturity Date		Jan. 01, 2021
Line of Credit Facility, Additional Borrowing									138,800
Line of Credit Facility, Remaining Borrowing Capacity									$ 685,000

Credit Facility and Long Term Debt - Scheduled Maturities Of Long Term Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Debt Disclosure [Abstract]
2014	$ 42,000
2015	42,000
2016	42,000
2017	543,000
2018	0
2021 and thereafter	0
Total scheduled maturities of long term debt	669,000
Current maturities of long term debt	42,000	$ 28,951
Long term debt obligations	$ 627,000

Commitments And Contingencies (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Loss Contingencies [Line Items]
Dividends, Stock	$ 59.0
Lease Expiration Date	2031
Rent expense included in selling, general and administrative expense	$ 83.0	$ 59.0	$ 41.8
Contingent rent expense	$ 11.0	$ 11.0	$ 7.8
Common Class C [Member]
Loss Contingencies [Line Items]
Par value per share	$ 0.0003	$ 0

- Definition

The increases or decreases in lease payments that result from changes occurring after the inception of the lease in the factors (other than the passage of time) on which lease payments are based, except that any escalation of minimum lease payments relating to increases in construction or acquisition cost of the leased property or for increases in some measure of cost or value during the construction or preconstruction period, are excluded from contingent rentals. Contingent rentals also may include amounts for which the triggering events have not yet occurred or the specified targets for which have not yet been achieved (such as sales based percentage rent), but which events are considered probable of occurring or which specified targets are considered probable of being achieved.

+ References + Details

Commitments And Contingencies (Future Minimum Lease Payments For Non-Cancelable Real Property Operating Leases) (Details) $ in Thousands	Dec. 31, 2015 USD ($)
Operating Leased Assets
2014	$ 84,620
2015	84,566
2016	81,912
2017	77,332
2018	73,808
2021 and thereafter	314,836
Total future minimum lease payments	$ 717,074

Commitments And Contingencies (Future Minimum Payments Under Sponsorship And Other Marketing Agreements) (Details) $ in Thousands	Dec. 31, 2015 USD ($)
Schedule of Future Minimum Payments on Sponsorship and Other Marketing Agreements [Line Items]
Future Minimum Payments Under Sponsorship And Other Marketing Agreements Due 2014	$ 126,488
Future Minimum Payments Under Sponsorship And Other Marketing Agreements Due 2015	138,607
Future Minimum Payments Under Sponsorship And Other Marketing Agreements Due 2016	137,591
Future Minimum Payments Under Sponsorship And Other Marketing Agreements Due 2017	98,486
Future Minimum Payments Under Sponsorship And Other Marketing Agreements Due 2018	67,997
Future Minimum Payments Under Sponsorship And Other Marketing Agreements Due 2019 and Thereafter	289,374
Total future minimum sponsorship and other payments	$ 858,543

Stockholders' Equity (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) vote $ / shares shares	Dec. 31, 2014 USD ($) $ / shares shares	Dec. 31, 2013 shares
Class A Common Stock
Class of Stock [Line Items]
Shares authorized	400,000,000	400,000,000
Common Stock, Value, Issued \| $	$ 61	$ 59
Par value per share \| $ / shares	$ 0.0003	$ 0.0003
Number of votes per share \| vote	1
Number of shares of Class A Common Shares issued per share upon conversion	2,150,000	3,400,000	2,600,000
Class B Convertible Common Stock
Class of Stock [Line Items]
Shares authorized	34,450,000	36,600,000
Common Stock, Value, Issued \| $	$ 11	$ 12
Par value per share \| $ / shares	$ 0.0003	$ 0.0003
Number of votes per share \| vote	10
Number of shares of Class A Common Shares issued per share upon conversion	2,150,000	3,400,000	2,600,000
Class A Common Stock And Class B Convertible Common Stock
Class of Stock [Line Items]
Class B Convertible Common Stock converted to Class A Common Stock, ratio	one-for-one
Common Class C [Member]
Class of Stock [Line Items]
Shares authorized	400,000,000	0
Common Stock, Value, Issued \| $	$ 0	$ 0
Par value per share \| $ / shares	$ 0.0003	$ 0
Minimum \| Class A Common Stock And Class B Convertible Common Stock
Class of Stock [Line Items]
Beneficial ownership percentage of CEO	15.00%

Fair Value Measurements (Financial Assets And (Liabilities) Measured At Fair Value) (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign Currency Contract, Asset, Fair Value Disclosure	$ 0	$ 0
TOLI policies held by the Rabbi Trust	0	0
Deferred Compensation Plan obligations	0	0
Available-for-sale Securities, Current	(6,534)	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign Currency Contract, Asset, Fair Value Disclosure	3,811	806
TOLI policies held by the Rabbi Trust	4,456	4,734
Deferred Compensation Plan obligations	(5,072)	(4,525)
Available-for-sale Securities, Current	0	0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign Currency Contract, Asset, Fair Value Disclosure	0	0
TOLI policies held by the Rabbi Trust	0	0
Deferred Compensation Plan obligations	0	0
Available-for-sale Securities, Current	0	0
Interest Rate Swap [Member] \| Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest Rate Derivatives, at Fair Value, Net	0	0
Interest Rate Swap [Member] \| Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest Rate Derivatives, at Fair Value, Net	(1,486)	(607)
Interest Rate Swap [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest Rate Derivatives, at Fair Value, Net	$ 0	$ 0

Provision For Income Taxes - Income (Loss) Before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Taxes Payable [Abstract]
United States	$ 272,739	$ 269,503	$ 196,558
Foreign	113,946	72,707	64,435
Income before income taxes	$ 386,685	$ 342,210	$ 260,993

Provision For Income Taxes - Components Of The Provision For Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Taxes Payable [Abstract]
Federal, Current	$ 102,317	$ 110,439	$ 85,542
State, Current	27,500	24,419	19,130
Other foreign countries, Current	28,336	16,489	13,295
Provision for income taxes, Current	158,153	151,347	117,967
Federal, Deferred	707	(15,368)	(14,722)
State, Deferred	(5,703)	(4,073)	(5,541)
Other foreign countries, Deferred	955	2,262	959
Provision for income taxes, Deferred	(4,041)	(17,179)	(19,304)
Provision for income taxes	$ 154,112	$ 134,168	$ 98,663

Provision For Income Taxes - Reconciliation From The U.S. Statutory Federal Income Tax Rate To Effective Income Tax Rate (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Taxes Payable [Abstract]
U.S. federal statutory income tax rate	35.00%	35.00%	35.00%
State taxes, net of federal tax impact	3.20%	3.80%	2.40%
Unrecognized tax benefits	3.40%	1.90%	2.50%
Nondeductible expenses	2.20%	1.00%	1.10%
Foreign rate differential	(5.50%)	(4.50%)	(4.80%)
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent	2.70%	2.50%	1.50%
Other	(1.10%)	(0.50%)	0.10%
Effective income tax rate	39.90%	39.20%	37.80%

Provision For Income Taxes - Deferred Tax Assets And Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred tax asset
Stock-based compensation	$ 40,406	$ 35,161
Allowance for doubtful accounts and other reserves	33,821	24,774
Foreign net operating loss carryforward	19,600	16,302
U. S. net operating loss carryforward	9,217	4,733
Deferred rent	13,991	11,005
Inventory obsolescence reserves	11,956	8,198
Tax basis inventory adjustment	10,019	5,845
State tax credits, net of federal tax impact	4,966	4,245
Foreign tax credits	6,151	5,131
Accrued expenses	19,999	11,398
Deferred compensation	2,080	1,858
Other	6,346	4,592
Total deferred tax assets	178,552	133,242
Less: valuation allowance	(24,043)	(15,550)
Total net deferred tax assets	154,509	117,692
Deferred tax liability
Property, plant and equipment	(31,069)	(17,638)
Intangible assets	(22,820)	(7,010)
Prepaid expenses	(8,766)	(6,424)
Other	(627)	(612)
Total deferred tax liabilities	(63,282)	(31,684)
Total deferred tax assets, net	$ 91,227	$ 86,008

Provision For Income Taxes - Unrecognized Tax Benefits Balances (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning of year	$ 28,353	$ 21,712	$ 15,297
Increases as a result of tax positions taken in a prior period	203	250	0
Decreases as a result of tax positions taken in a prior period	0	0	0
Increases as a result of tax positions taken during the current period	14,382	8,947	7,526
Decreases as a result of tax positions taken during the current period	0	0	0
Decreases as a result of settlements during the current period	0	0	0
Reductions as a result of a lapse of statute of limitations during the current period	(327)	(2,556)	(1,111)
End of year	$ 42,611	$ 28,353	$ 21,712

Provision For Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Mar. 17, 2015
Income Tax Contingency [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards, Domestic	$ 9,217	$ 4,733
State tax credits, net of federal tax impact	4,966	4,245
Foreign net operating loss carryforward	19,600	16,302
Valuation allowance recorded during period	6,800
Deferred tax assets associated with foreign tax credits	6,151	5,131
Cash and Cash Equivalents Held by Foreign Subsidiaries	48,500
Undistributed Earnings, Basic	298,500
Unrecognized Tax Benefits Including Interest And Penalties	46,900	31,300
Unrecognized tax benefits excluding interest and penalties that would impact the effective tax rate if recognized	38,400
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	4,300	3,000	$ 2,400
Accrual of interest and penalties	$ 1,700	$ 1,200	$ 1,000
Minimum
Income Tax Contingency [Line Items]
Deferred Tax Assets, Net Operating Loss Carryforwards, Domestic Expiration	2033
Deferred Tax Assets, Net Operating Loss Carryforwards, Foreign Expiration	2017
Maximum
Income Tax Contingency [Line Items]
Deferred Tax Assets, Net Operating Loss Carryforwards, Domestic Expiration	2035
Deferred Tax Assets, Net Operating Loss Carryforwards, Foreign Expiration	2021
Net [Member]
Income Tax Contingency [Line Items]
Foreign net operating loss carryforward	$ 0
Net [Member] \| MyFitnessPal [Member]
Income Tax Contingency [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards, Domestic	0			$ 21,100
State tax credits, net of federal tax impact	1,400			1,400
Gross [Member]
Income Tax Contingency [Line Items]
Foreign net operating loss carryforward	75,300
Gross [Member] \| MyFitnessPal [Member]
Income Tax Contingency [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards, Domestic	$ 0			$ 89,100

Earnings Per Share (Narrative) (Detail) - shares	12 Months Ended
Earnings Per Share (Narrative) (Detail) - shares	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares excluded from the computation of diluted earnings per share	770,000	22,600	116,900

Earnings Per Share (Schedule Of Reconciliation Of Basic Earnings Per Share To Diluted Earnings Per Share) (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Disclosure Earnings Per Share Schedule Of Reconciliation Of Basic Earnings Per Share To Diluted Earnings Per Share [Abstract]
Net income	$ 105,602	$ 100,477	$ 14,766	$ 11,728	$ 87,709	$ 89,105	$ 17,690	$ 13,538	$ 232,573	$ 208,042	$ 162,330
Effect of dilutive securities									5,370	6,153	5,262
Weighted average common shares and dilutive securities outstanding									220,868	219,380	215,958
Earnings per share - basic	$ 0.49	$ 0.47	$ 0.07	$ 0.05	$ 0.41	$ 0.42	$ 0.08	$ 0.06	$ 1.08	$ 0.98	$ 0.77
Earnings per share - diluted	$ 0.48	$ 0.45	$ 0.07	$ 0.05	$ 0.40	$ 0.41	$ 0.08	$ 0.06	$ 1.05	$ 0.95	$ 0.75
Weighted Average Number of Shares Outstanding, Basic									215,498	213,227	210,696

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

+ References + Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References + Details

Stock-Based Compensation - Schedule of Share-based Payment Award, Valuation Assumptions (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate	1.80%	0.00%	1.20%
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term	5 years 11 months 29 days	0 years	6 years 3 months
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate	44.30%	0.00%	55.40%
Expected dividend yield	0.00%	0.00%	0.00%

Stock-Based Compensation - Summary Of Stock Options Activity (Details) - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, beginning of year, Number of Stock Options	2,811	4,272	6,298
Granted, at fair market value, Number of Stock Options	579	0	20
Exercised, Number of Stock Options	(360)	(1,454)	(1,822)
Expired, Number of Stock Options	0	0	0
Forfeited, Number of Stock Options	(26)	(7)	(224)
Outstanding, end of year, Number of Stock Options	3,004	2,811	4,272
Options exercisable, end of year, Number of Stock Options	2,446	2,707	2,346
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding, beginning of year, Weighted Average Exercise Price	$ 8.28	$ 8.11	$ 7.66
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price	40.30	0.00	24.35
Exercised, Weighted Average Exercise Price	7.92	7.74	6.68
Expired, Weighted Average Exercise Price	0.00	0.00	0.00
Forfeited, Weighted Average Exercise Price	4.53	16.46	8.41
Outstanding, end of year, Weighted Average Exercise Price	14.52	8.28	8.11
Options exercisable, end of year, Weighted Average Exercise Price	8.26	$ 7.87	7.80
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 54.59		$ 12.91
Certain Executives and Key Employees [Member] \| Two Thousand Five Plan [Member] \| Performance Based Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period	300
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price	$ 72.90

Stock-Based Compensation - Stock Options Outstanding And Exercisable (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price		$ 40.30	$ 0.00	$ 24.35
Options Outstanding, Number of Underlying Shares		3,004	2,811	4,272	6,298
Options Outstanding, Weighted Average Exercise Price Per Share		$ 14.52	$ 8.28	$ 8.11	$ 7.66
Options Outstanding, Weighted Average Remaining Contractual Life (Years)		4 years 10 months 29 days
Options Outstanding, Total Intrinsic Value		$ 198,535
Options Exercisable, Number of Underlying Shares		2,446	2,707	2,346
Options Exercisable, Weighted Average Exercise Price Per Share		$ 8.26	$ 7.87	$ 7.80
Options Exercisable, Weighted Average Remaining Contractual Life (Years)		4 years 20 days
Options Exercisable, Total Intrinsic Value		$ 176,973
Certain Executives and Key Employees [Member] \| Two Thousand Five Plan [Member] \| Performance Based Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price		$ 72.90
Allocated Share-based Compensation Expense		$ 2,400
Allocated Share-based Compensation Expense, Cumulative Adjustment	$ 900
Additional Stock Based Compensation That Would Have Been Recorded If Operating Income Targets Had Been Deemed Probable		$ 600

Stock-Based Compensation - Summary Of Restricted Stock And Restricted Stock Units (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended					12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Restricted Stock And Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding, beginning of year, Number of Restricted Shares			5,244		4,514	4,510	5,244	4,514
Performance-based restricted stock units awarded						1,015	1,061	1,682
Forfeited, Number of Restricted Shares						(326)	(958)	(410)
Vested, Number of Restricted Shares						(1,819)	(837)	(542)
Outstanding, end of year, Number of Restricted Shares		4,510		5,244		3,380	4,510	5,244
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Outstanding, beginning of year, Weighted Average Value			$ 22.19		$ 19.51	$ 30.42	$ 22.19	$ 19.51
Granted, Weighted Average Fair Value (per share)						76.72	54.17	26.35
Forfeited, Weighted Average Value						48.57	20.98	17.37
Vested, Weighted Average Value						23.22	19.49	16.76
Outstanding, end of year, Weighted Average Value		$ 30.42		$ 22.19		$ 46.45	$ 30.42	$ 22.19
Certain Executives and Key Employees [Member] \| Two Thousand Five Plan [Member] \| Performance Based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense, Cumulative Adjustment	$ 9.1	$ 3.8	$ 6.6	$ 11.3	$ 9.0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Performance-based restricted stock units awarded						800	1,000	1,400
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Granted, Weighted Average Fair Value (per share)						$ 46.91

Stock-Based Compensation - Narrative (Details) - USD ($)	3 Months Ended					12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2006	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation						$ 60,376,000	$ 50,812,000	$ 43,184,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized						$ 46,300,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition						1 year 23 days
Granted, at fair market value, Number of Stock Options						579,000	0	20,000
Options Outstanding, Weighted Average Exercise Price Per Share		$ 8.28		$ 8.11		$ 14.52	$ 8.28	$ 8.11		$ 7.66
Two Thousand Five Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant						18,100,000
Non Employee Directors Fair Value Of Stock Awards						$ 125,000
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant						2,700,000
Employee Stock Purchase Program Discount Rate From Fair Market Value						15.00%
Stock Issued During Period, Shares, Employee Stock Purchase Plans						103,300	87,600	108,400
Director Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non Employee Directors Fair Value Of Stock Awards						$ 100,000
Non Employee Directors Stock Awards Percentage Of Each Award Vested Following Grant Date						100.00%
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value						$ 54.59		$ 12.91
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value						$ 27,500,000	$ 73,000,000	$ 44,100,000
Warrant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights									1,900,000
fair Value Of Warrants Issued									$ 3,600,000
Term Of Warrants Issued									12 years
Class of Warrant or Right, Exercise Price of Warrants or Rights									$ 9.25
Certain Executives and Key Employees [Member] \| Performance Based Restricted Stock Units [Member] \| Two Thousand Five Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense						$ 30,800,000	$ 38,400,000	$ 30,800,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period						800,000	1,000,000	1,400,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value						$ 46.91
Allocated Share-based Compensation Expense, Cumulative Adjustment	$ 9,100,000	$ 3,800,000	$ 6,600,000	$ 11,300,000	$ 9,000,000
Additional Stock Based Compensation That Would Have Been Recorded If Operating Income Targets Had Been Deemed Probable						$ 3,000,000

Other Employee Benefits (Details) - USD ($) $ in Millions	12 Months Ended
Other Employee Benefits (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Compensation Related Costs [Abstract]
401(k) contribution matching expense	$ 7.0	$ 4.9	$ 2.7
Deferred compensation plan obligations included in other long term liabilities	5.1	4.5
Cash-surrender value of trust owned life insurance policies	$ 4.5	$ 4.7

Risk Management And Derivatives (Narrative) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Derivative [Line Items]
Maturity of foreign currency forward contract	11 months
Foreign Currency Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	$ 3,500	$ 400
Notional Amount of Interest Rate Derivatives	$ 468,100
Minimum Remaining Maturity of Foreign Currency Derivatives	1 month
Secured Debt [Member]
Derivative [Line Items]
Secured Debt	$ 44,000	46,000	$ 48,000	$ 50,000
Interest Rate Swap [Member]
Derivative [Line Items]
Notional Amount of Interest Rate Derivatives	170,700
Derivative, Gain (Loss) on Derivative, Net	2,700	1,700
Interest Rate Derivative Liabilities, at Fair Value	1,500	600
Fair Value, Inputs, Level 2 [Member]
Derivative [Line Items]
Foreign Currency Contract, Asset, Fair Value Disclosure	$ 3,811	$ 806

Risk Management And Derivatives (Changes In Foreign Currency Exchange Rates And Derivative Foreign Currency Forward Contracts) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Foreign Currency Exchange Gain Loss [Line Items]
Unrealized foreign currency exchange rate gains (losses)	$ (33,359)	$ (11,739)	$ (1,905)
Realized foreign currency exchange rate gains (losses)	7,643	2,247
Unrealized derivative gains (losses)	388	1
Realized derivative gains (losses)	$ (16,404)	$ (3,081)
Foreign Currency Exchange Rates [Member]
Foreign Currency Exchange Gain Loss [Line Items]
Unrealized foreign currency exchange rate gains (losses)			(1,905)
Realized foreign currency exchange rate gains (losses)			477
Foreign Currency Forward Contracts [Member]
Foreign Currency Exchange Gain Loss [Line Items]
Unrealized derivative gains (losses)			13
Realized derivative gains (losses)			$ (243)

Related Party Transactions (Details) - USD ($)	12 Months Ended
Related Party Transactions (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Related Party - Operating Lease Agreement [Member]
Related Party Transaction [Line Items]
Fees paid		$ 2,000,000	$ 1,800,000	$ 1,000,000
Amount payable to related party		$ 0	$ 0
Related Party Operating Lease Agreement, Office Space [Member]
Related Party Transaction [Line Items]
Fees paid	$ 1,100,000
Lease Term Remaining	10 years
Annual Rent Escalation, Percent	2.00%
Related Party Operating Lease Agreement, Manufacturing Facility [Member]
Related Party Transaction [Line Items]
Fees paid	$ 515,000
Lease Term Remaining	5 years
Annual Rent Escalation, Percent	2.50%

Segment Data And Related Information (Geographic Distribution Of The Company's Net Revenues And Operating Income) (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Total net revenues	$ 1,170,686	$ 1,204,109	$ 783,577	$ 804,941	$ 895,201	$ 937,908	$ 609,654	$ 641,607	$ 3,963,313	$ 3,084,370	$ 2,332,051
Total operating income	$ 177,582	$ 171,397	$ 31,901	$ 27,667	$ 146,299	$ 146,106	$ 34,694	$ 26,856	408,547	353,955	265,098
Interest expense, net									(14,628)	(5,335)	(2,933)
Other expense, net									(7,234)	(6,410)	(1,172)
Income before income taxes									386,685	342,210	260,993
Connected Fitness [Member]
Segment Reporting Information [Line Items]
Total net revenues									53,415	19,225	1,068
Total operating income									(61,301)	(20,669)	(534)
North America [Member]
Segment Reporting Information [Line Items]
Total net revenues									3,455,737	2,796,374	2,193,739
Total operating income									460,961	379,814	271,338
Other Foreign Countries [Member]
Segment Reporting Information [Line Items]
Total net revenues									454,161	268,771	137,244
Total operating income									$ 8,887	$ (5,190)	$ (5,706)

Segment Data And Related Information (Net Revenues By Product Category) (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Total net sales									$ 3,825,691	$ 2,997,916	$ 2,277,073
License revenues									84,207	67,229	53,910
Total net revenues	$ 1,170,686	$ 1,204,109	$ 783,577	$ 804,941	$ 895,201	$ 937,908	$ 609,654	$ 641,607	3,963,313	3,084,370	2,332,051
Apparel [Member]
Segment Reporting Information [Line Items]
Total net sales									2,801,062	2,291,520	1,762,150
Footwear [Member]
Segment Reporting Information [Line Items]
Total net sales									677,744	430,987	298,825
Accessories [Member]
Segment Reporting Information [Line Items]
Total net sales									346,885	275,409	216,098
Connected Fitness [Member]
Segment Reporting Information [Line Items]
Total net sales											1,068
Total net revenues									53,415	19,225	$ 1,068
Connected Fitness [Member] \| Connected Fitness [Member]
Segment Reporting Information [Line Items]
Total net sales									$ 53,415	$ 19,225

Unaudited Quarterly Financial Data (Selected Quarterly Financial Data) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Quarterly Financial Data [Abstract]
Net revenues	$ 1,170,686	$ 1,204,109	$ 783,577	$ 804,941	$ 895,201	$ 937,908	$ 609,654	$ 641,607	$ 3,963,313	$ 3,084,370	$ 2,332,051
Gross profit	561,670	587,160	379,053	377,664	446,264	465,300	299,952	300,690	1,905,547	1,512,206	1,136,670
Income from operations	177,582	171,397	31,901	27,667	146,299	146,106	34,694	26,856	408,547	353,955	265,098
Net income	$ 105,602	$ 100,477	$ 14,766	$ 11,728	$ 87,709	$ 89,105	$ 17,690	$ 13,538	$ 232,573	$ 208,042	$ 162,330
Earnings per share - basic	$ 0.49	$ 0.47	$ 0.07	$ 0.05	$ 0.41	$ 0.42	$ 0.08	$ 0.06	$ 1.08	$ 0.98	$ 0.77
Earnings per share - diluted	$ 0.48	$ 0.45	$ 0.07	$ 0.05	$ 0.40	$ 0.41	$ 0.08	$ 0.06	$ 1.05	$ 0.95	$ 0.75

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

+ References + Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References + Details

Valuation And Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Allowance For Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	$ 3,693	$ 2,938	$ 3,286
Charged to Costs and Expenses	2,951	1,028	210
Write-Offs Net of Recoveries	(714)	(273)	(558)
Balance at End of Year	5,930	3,693	2,938
Sales Returns And Allowances [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	52,973	34,102	32,919
Charged to Costs and Expenses	145,828	156,791	135,739
Write-Offs Net of Recoveries	(126,186)	(137,920)	(134,556)
Balance at End of Year	72,615	52,973	34,102
Deferred Tax Asset Valuation Allowance [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	15,550	8,091	3,996
Charged to Costs and Expenses	8,493	7,581	4,095
Write-Offs Net of Recoveries	0	(122)	0
Balance at End of Year	$ 24,043	$ 15,550	$ 8,091

Description of the Business	12 Months Ended
Description of the Business	Dec. 31, 2015
Text Block [Abstract]
Description of the Business	Description of the Business Under Armour, Inc. is a developer, marketer and distributor of branded performance apparel, footwear and accessories. These products are sold worldwide and worn by athletes at all levels, from youth to professional on playing fields around the globe, as well as by consumers with active lifestyles. The Under Armour Connected Fitness^TMplatform powers the world's largest digital health and fitness community. The Company uses this platform to engage its consumers and increase awareness and sales of its products.

Segment Data And Related Information (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
UNITED STATES
Segment Reporting, Revenue Reconciling Item [Line Items]
Total net revenues in the United States	$ 3,268.8	$ 2,651.1	$ 2,082.5