Under Armour (UA) 10-Q 1 May 15 2015 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2015
Entity Information [Line Items]
Document Type	10-Q
Amendment Flag	FALSE
Document Period End Date	31-Mar-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Trading Symbol	UA
Entity Registrant Name	UNDER ARMOUR, INC.
Entity Central Index Key	1336917
Current Fiscal Year End Date	-19
Entity Filer Category	Large Accelerated Filer
Class A Common Stock [Member]
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding	179,386,971
Class B Convertible Common Stock [Member]
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding	36,150,000

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
In Thousands, unless otherwise specified
Assets
Cash and cash equivalents	$232,040	$593,175	$179,926
Accounts receivable, net	395,917	279,835	331,299
Inventories	577,947	536,714	472,244
Prepaid expenses and other current assets	162,609	87,177	100,857
Deferred income taxes	65,966	52,498	40,831
Total current assets	1,434,479	1,549,399	1,125,157
Property and equipment, net	359,489	305,564	240,721
Goodwill	595,492	123,256	123,388
Intangible assets, net	87,075	26,230	31,571
Deferred income taxes	14,104	33,570	35,538
Other long term assets	57,415	57,064	42,641
Total assets	2,548,054	2,095,083	1,599,016
Liabilities and Stockholders' Equity
Line of Credit Facility, Amount Outstanding	0	0	100,000
Accounts payable	252,051	210,432	166,920
Accrued expenses	137,482	147,681	103,844
Current maturities of long term debt	43,347	28,951	4,812
Other current liabilities	15,339	34,563	11,676
Total current liabilities	448,219	421,627	387,252
Long term debt, net of current maturities	383,500	255,250	46,846
Revolving credit facility, long term	250,000	0	0
Other long term liabilities	81,809	67,906	56,341
Total liabilities	1,163,528	744,783	490,439
Commitments and contingencies (see Note 4)
Stockholders' equity
Additional paid-in capital	554,928	508,350	443,132
Retained earnings	856,640	856,687	664,870
Accumulated other comprehensive income	-27,114	-14,808	504
Total stockholders' equity	1,384,526	1,350,300	1,108,577
Total liabilities and stockholders' equity	2,548,054	2,095,083	1,599,016
Class A Common Stock [Member]
Stockholders' equity
Common Stock	60	59	58
Class B Convertible Common Stock [Member]
Stockholders' equity
Common Stock	$12	$12	$13

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Class A Common Stock [Member]
Par value	$0.00	$0.00	$0.00
Shares authorized	400,000,000	400,000,000	400,000,000
Shares issued	179,386,971	177,295,988	173,730,570
Shares outstanding	179,386,971	177,295,988	173,730,570
Class B Convertible Common Stock [Member]
Par value	$0.00	$0.00	$0.00
Shares authorized	36,150,000	36,600,000	39,375,000
Shares issued	36,150,000	36,600,000	39,375,000
Shares outstanding	36,150,000	36,600,000	39,375,000

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Net revenues	$804,941	$641,607
Cost of goods sold	427,277	340,917
Gross profit	377,664	300,690
Selling, general and administrative expenses	349,997	273,834
Income from operations	27,667	26,856
Interest Income (Expense), Net	-2,210	-846
Other income (expense), net	-1,840	-874
Income before income taxes	23,617	25,136
Provision for income taxes	11,889	11,598
Net income	$11,728	$13,538
Net income available per common share
Basic	$0.05	$0.06
Diluted	$0.05	$0.06
Weighted average common shares outstanding
Basic	214,697	212,383
Diluted	219,616	216,912

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Net income	$11,728	$13,538
Other comprehensive income:
Foreign currency translation adjustment	-12,829	-1,577
Unrealized gain on cash flow hedge, net of tax	523	-113
Total other comprehensive income	-12,306	-1,690
Comprehensive income	($578)	$11,848

Consolidated_Statements_of_Com1

Consolidated Statements of Comprehensive Income (Parenthetical) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax	($65,000)	($78,000)

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Cash flows from operating activities
Net income	$11,728,000	$13,538,000
Adjustments to reconcile net income to net cash used in operating activities
Depreciation and amortization	21,308,000	17,320,000
Unrealized foreign currency exchange rate (gains) losses	21,416,000	655,000
Loss on disposal of property and equipment	227,000	52,000
Stock-based compensation	9,043,000	13,220,000
Deferred Income Taxes and Tax Credits	4,049,000	-6,913,000
Changes in reserves and allowances	5,792,000	2,282,000
Changes in operating assets and liabilities:
Accounts receivable	-127,439,000	-121,091,000
Inventories	-50,303,000	-3,915,000
Prepaid expenses and other assets	-39,899,000	-15,479,000
Accounts payable	40,066,000	7,141,000
Accrued expenses and other liabilities	-14,264,000	-25,841,000
Income taxes payable and receivable	-58,250,000	-28,505,000
Net cash used in operating activities	-176,526,000	-147,536,000
Cash flows from investing activities
Purchase of property and equipment	-68,619,000	-39,715,000
Payments to Acquire Businesses, Net of Cash Acquired	-539,109,000	-10,924,000
Payments to Acquire Productive Assets	-2,494,000	-261,000
Net cash used in investing activities	-610,222,000	-50,900,000
Cash flows from financing activities
Proceeds from Lines of Credit	250,000,000	0
Proceeds From Term Loan	150,000,000	0
Payments on long term debt	-7,355,000	-1,265,000
Excess tax benefits from stock-based compensation arrangements	34,613,000	24,038,000
Proceeds from exercise of stock options and other stock issuances	2,922,000	8,627,000
Payments of deferred financing costs	-946,000	0
Net cash provided by financing activities	429,234,000	31,400,000
Effect of exchange rate changes on cash and cash equivalents	-3,621,000	-527,000
Net decrease in cash and cash equivalents	-361,135,000	-167,563,000
Cash and cash equivalents
Beginning of period	593,175,000	347,489,000
End of period	232,040,000	179,926,000
Noncash or Part Noncash Acquisition, Fixed Assets Acquired	-195,000	-8,650,000
Noncash or Part Noncash Acquisition, Fixed Assets Acquired Under Build-to-Suit Leases	5,631,000	0
Noncash or Part Noncash Acquisition, Value of Assets Acquired	$0	$11,233,000

Description_of_the_Business

Description of the Business	3 Months Ended
	Mar. 31, 2015
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 Company's Connected FitnessTM platform powers the world's largest digital health and fitness community. The Company uses this platform to connect with its consumers and increase awareness and sales of its products.

Summary_of_Significant_Account

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2015
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”). Certain information in footnote disclosures normally included in annual financial statements was condensed or omitted for the interim periods presented in accordance with the rules and regulations of the Securities and Exchange Commission (the “SEC”) and accounting principles generally accepted in the United States of America for interim consolidated financial statements. In the opinion of management, all adjustments consisting of normal, recurring adjustments considered necessary for a fair statement of the financial position and results of operations were included. All intercompany balances and transactions were eliminated. The consolidated balance sheet as of December 31, 2014 is derived from the audited financial statements included in the Company’s Annual Report on Form 10-K filed with the SEC for the year ended December 31, 2014 (the “2014 Form 10-K”), which should be read in conjunction with these consolidated financial statements. The results for the three months ended March 31, 2015 are not necessarily indicative of the results to be expected for the year ending December 31, 2015 or any other portions thereof.
	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 Company’s Connected Fitness community. The initial purchase price allocation for each acquisition is reflected in the consolidated balance sheet as of March 31, 2015. These purchase price allocations are preliminary, pending the finalization of deferred tax assets and liabilities and the valuations for certain intangible assets.
	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 had a customer in North America that individually accounted for 21.5%, 23.4% and 30.9% of accounts receivable as of March 31, 2015, December 31, 2014 and March 31, 2014, respectively. The Company's largest customer accounted for 12.9% and 16.7% of net revenues as of March 31, 2015 and 2014, respectively.
	Allowance for Doubtful Accounts
	As of March 31, 2015, December 31, 2014 and March 31, 2014, the allowance for doubtful accounts was $5.4 million, $3.7 million and $3.4 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 $13.0 million and $11.3 million for the three months ended March 31, 2015 and 2014, respectively. The Company includes outbound freight costs associated with shipping goods to customers as a component of cost of goods sold.
	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.
	Recently Issued Accounting Standards
	In May 2014, the Financial Accounting Standards Board (“FASB”) issued an Accounting Standards Update which supersedes the most current revenue recognition 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 is currently effective for annual and interim reporting periods beginning after December 15, 2016, with early adoption not permitted. In April 2015, the FASB voted for a proposed one-year deferral of the effective date of the new revenue recognition standard. If approved, the new standard will become effective for annual and interim periods beginning after December 15, 2017 with early adoption as of the original effective date permitted.
	In February 2015, the FASB issued an Accounting Standard Update which amends the current consolidation guidance. This guidance is effective for annual reporting periods beginning after December 15, 2015 and interim reporting periods within fiscal years beginning after December 15, 2016, with early adoption permitted.
	In April 2015, the FASB issued an Accounting Standard Update which requires all costs incurred to issue debt to be presented in the balance sheet as a direct deduction from the carrying value of the debt. This guidance is effective for annual and interim reporting periods beginning after December 15, 2015, with early adoption permitted.
	The Company is currently evaluating these standards to determine the impact of their adoption on its 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 Company's consolidated financial statements.

Acquisitions

Acquisitions	3 Months Ended
	Mar. 31, 2015
Business Combinations [Abstract]
Acquisitions	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 Company’s Connected Fitness community for $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 statement 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 Company’s 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 cost 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 current period. 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 three months ended March 31, 2015 and March 31, 2014:
		Three Months Ended March 31,
	(In thousands)	2015			2014
	Net revenues	$	808,636		$	645,344
	Net Income	10,413			6,807
	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 three months ended March 31, 2014 reflects the impact of $5.7 million in transaction expenses included in the consolidated statement of income for the three months ended March 31, 2015, but excluded from the calculation of pro forma net income for that period.
	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 preliminary, pending the finalization of deferred tax assets and liabilities and the valuations for intangible assets. The Company expects to finalize the purchase price and goodwill allocations to reportable segments during the second quarter of 2015. The following table summarizes the allocation of estimated fair values of the net assets acquired during the three months ended March 31, 2015, including the related estimated useful lives, where applicable:
		MyFitnessPal				Endomondo
		(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		—			0
	Technology	3,200		5		5,000			5
	Trade name	2,300		5		400			5
	Other net assets acquired (net liabilities assumed)	8,896				(1,925		)
	Net assets acquired	$	57,196			$	14,075
	Goodwill	406,731				73,169
	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 will amortize the intangible assets on a straight-line basis over their estimated useful lives.
	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.

Credit_Facility_and_Long_Term_

Credit Facility and Long Term Debt	3 Months Ended
	Mar. 31, 2015
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 facility and terminated its prior $325.0 million secured revolving credit facility. The credit agreement has a term of five years through May 2019, with permitted extensions under certain circumstances. The credit agreement initially provided for a committed revolving credit facility of $400.0 million, in addition to an aggregate term loan commitment of $250.0 million, consisting of a $150.0 million initial term loan, which was drawn in full at the closing of the credit agreement, and $100.0 million delayed draw term loan, which was drawn in full in November 2014 for general corporate purposes. In March 2015, the Company amended the credit agreement, providing an additional $150.0 million of term loan borrowings, which were borrowed on the closing date of the amendment, resulting in aggregate term loan borrowings under the credit agreement of $400.0 million. This amendment also increased revolving credit facility commitments available under the credit agreement from $400.0 million to $800.0 million, of which the Company borrowed $250.0 million on the closing date of the amendment. These additional borrowings were used to fund, in part, the acquisition of MFP. At the Company's request 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, as amended. 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. 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 no significant letters of credit or swingline loans outstanding as of March 31, 2015.
	The Company used $100.0 million of the proceeds from the initial term loan to repay the $100.0 million outstanding under the Company's prior revolving credit facility. No penalties or other early termination fees were incurred in connection with the termination of the prior revolving credit facility.
	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 March 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 initial term loan, delayed draw term loan, new term loan and revolving credit facility were 1.20%, 1.20%, 1.31% and 1.31% during the three months ended March 31, 2015, respectively. $250.0 million was outstanding under the Company’s revolving credit facility as of March 31, 2015. Additionally, the Company pays a commitment fee on the average daily unused amount of the revolving credit facility, a ticking fee on the undrawn amounts under the delayed draw term loan and certain fees with respect to letters of credit. As of March 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. As these agreements are not committed facilities, each advance is subject to approval by the lenders. Additionally, these agreements include a cross default provision whereby an event of default under other debt obligations, including the Company’s credit facility, will be considered an event of default under these agreements. These agreements require a prepayment fee if the Company pays outstanding amounts ahead of the scheduled terms. At March 31, 2015, December 31, 2014 and March 31, 2014, the outstanding principal balance under these agreements was $1.3 million, $2.0 million and $4.2 million, respectively. 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 3.1% and 3.2% for the three months ended March 31, 2015 and 2014, 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 March 31, 2015, December 31, 2014 and March 31, 2014, the outstanding balance on the loan was $45.5 million, $46.0 million and $47.5 million, respectively. The weighted average interest rate on the loan was 1.7% for the three months ended March 31, 2015 and 2014.
	Interest expense, net was $2.2 million and $0.8 million for the three months ended March 31, 2015 and 2014, respectively. Interest expense includes the amortization of deferred financing costs and interest expense under the credit and other 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

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2015
Commitments and Contingencies	Commitments and Contingencies
	There were no significant changes to the contractual obligations reported in the 2014 Form 10-K other than those which occur in the normal course of business.
	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.
	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.

Fair_Value_Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2015
Fair Value Measurements	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:
			31-Mar-15							31-Dec-14							31-Mar-14
	(In thousands)		Level 1		Level 2			Level 3		Level 1		Level 2			Level 3		Level 1		Level 2			Level 3
	Derivative foreign currency contracts (see Note 8)		$	—	$	3,187		$	—	$	—	$	806		$	—	$	—	$	62		$	—
	Interest rate swap contracts (see Note 8)		—		(2,535		)	—		—		(607		)	—		—		896			—
	TOLI policies held by the Rabbi Trust		—		4,747			—		—		4,734			—		—		4,638			—
	Deferred Compensation Plan obligations		—		(4,798		)	—		—		(4,525		)	—		—		(3,995		)	—
	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 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 market exchange rate. The interest rate swap contracts represent gains and losses on the derivative contracts, 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 March 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).

StockBased_Compensation

Stock-Based Compensation	3 Months Ended
	Mar. 31, 2015
Stock-Based Compensation	Stock-Based Compensation
	During the three months ended March 31, 2015, 0.7 million performance-based restricted stock units and 0.3 million performance-based options were awarded to certain officers and key employees under the Company's Second Amended and Restated 2005 Omnibus Long-Term Incentive Plan. The awards have vesting conditions tied to the achievement of certain combined annual operating income targets for 2015 and 2016. Upon the achievement of the targets, one third of the restricted stock units will vest each in February 2017, February 2018 and February 2019. If certain lower levels of combined annual operating income for 2015 and 2016 are achieved, fewer or no restricted stock units will vest and the remaining restricted stock units will be forfeited. The Company deemed the achievement of certain operating income targets for 2015 and 2016 probable during the three months ended March 31, 2015. The Company assesses the probability of the achievement of the remaining 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 $1.3 million would have been recorded during the three months ended March 31, 2015, for these performance-based restricted stock units and options had the achievement of the remaining operating income targets been deemed probable.
	During 2014, the Company granted performance-based restricted stock units with vesting conditions tied to the achievement of certain combined annual operating income targets for 2014 and 2015. During the three months ended September 30, 2014, the Company deemed the achievement of certain operating income targets for 2014 and 2015 probable and recorded a cumulative adjustment of $3.8 million. Additional stock based compensation of up to $3.5 million would have been recorded during the three months ended March 31, 2015, for these performance-based restricted stock units had the achievement of the remaining operating income targets been deemed probable.
	During 2012 and 2013, the Company granted performance-based restricted stock units with vesting conditions tied to the achievement of certain combined annual operating income targets for 2013 and 2014. During the three months ended March 31, 2014, the Company deemed the achievement of the remaining operating income targets for 2013 and 2014 probable and recorded a cumulative adjustment of $6.6 million.
	The Company issued approximately 289.7 thousand options to purchase shares of the Company’s Class A common stock in connection with the acquisition of MFP, which are conditioned upon continuous employment. These shares have been excluded from purchase consideration and will be recognized over the requisite service period as stock-based compensation.

Risk_Management_and_Derivative

Risk Management and Derivatives	3 Months Ended
	Mar. 31, 2015
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 the Company expands its international business, it may expand the current hedging program to include additional currency pairs and instruments.
	As of March 31, 2015, the aggregate notional value of the Company's outstanding foreign currency contracts was $309.0 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 eight months. A portion of the Company's foreign currency 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 three months ended March 31, 2015, the Company reclassified $0.4 million from other comprehensive income to cost of goods sold related to foreign currency contracts designated as cash flow hedges. The fair values of the Company's foreign currency contracts were assets of $3.2 million, $0.8 million, and $0.1 million as of March 31, 2015, December 31, 2014, and March 31, 2014, respectively, and were included in prepaid expenses and other current assets on the consolidated balance sheet. Refer to Note 6 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 contracts:
		Three Months Ended March 31,
	(In thousands)	2015			2014
	Unrealized foreign currency exchange rate gains (losses)	$	(21,416	)	$	(655	)
	Realized foreign currency exchange rate gains (losses)	6,341			451
	Unrealized derivative gains (losses)	217			70
	Realized derivative gains (losses)	13,018			(740		)
	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 4 for a discussion of long term debt.
	As of March 31, 2015, the notional value of the Company's outstanding interest rate swap contracts was $183.8 million. During the three months ended March 31, 2015 and 2014, the Company recorded a $0.7 million and $0.1 million increase in interest expense, respectively, representing the effective portion of the contract reclassified from accumulated other comprehensive income. The fair value of the interest rate swap contracts was a liability of $2.5 million and $0.6 million as of March 31, 2015 and December 31, 2014, respectively, and was included in other long term liabilities on the consolidated balance sheet. The fair value of the interest rate swap contract was an asset of $0.9 million as of March 31, 2014, and was included in other long term assets 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 contracts. However, the Company monitors the credit quality of these financial institutions and considers the risk of counterparty default to be minimal.

Provision_for_Income_Taxes

Provision for Income Taxes	3 Months Ended
	Mar. 31, 2015
Provision for Income Taxes	Provision for Income Taxes
	The effective rates for income taxes were 50.3% and 46.1% for the three months ended March 31, 2015 and 2014, respectively. The annual effective tax rate is expected to be approximately 41.0%.

Earnings_per_Share

Earnings per Share	3 Months Ended
	Mar. 31, 2015
Earnings per Share	Earnings per Share
	The following represents a reconciliation from basic earnings per share to diluted earnings per share:
		Three Months Ended March 31,
	(In thousands, except per share amounts)	2015		2014
	Numerator
	Net income	$	11,728	$	13,538
	Denominator
	Weighted average common shares outstanding	214,697		212,383
	Effect of dilutive securities	4,919		4,529
	Weighted average common shares and dilutive securities outstanding	219,616		216,912
	Earnings per share - basic	$	0.05	$	0.06
	Earnings per share - diluted	$	0.05	$	0.06
	Effects of potentially dilutive securities are presented only in periods in which they are dilutive. Stock options and restricted stock units representing 411.8 thousand and 16.8 thousand shares of common stock outstanding for the three months ended March 31, 2015 and 2014, respectively, were excluded from the computation of diluted earnings per share because their effect would have been anti-dilutive.

Segment_Data_and_Related_Infor

Segment Data and Related Information	3 Months Ended
	Mar. 31, 2015
Segment Data and Related Information	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 other foreign countries for disclosure purposes. Due to the insignificance of the Latin America, EMEA and Asia-Pacific operating segments, they continue to be combined into other foreign countries 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. In addition to net revenues, operating income (loss) is a primary financial measure used by the Company to evaluate performance of each segment. Intercompany balances were eliminated for separate disclosure. The majority of corporate service costs within North America have not been allocated to other foreign countries 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.
		Three Months Ended March 31,
	(In thousands)	2015			2014
	Net revenues
	North America	$	700,512		$	582,537
	Other foreign countries	95,998			55,103
	Connected Fitness	8,431			3,967
	Total net revenues	$	804,941		$	641,607
		Three Months Ended March 31,
	(In thousands)	2015			2014
	Operating income (loss)
	North America	$	38,369		$	32,920
	Other foreign countries	4,334			(654		)
	Connected Fitness	(15,036		)	(5,410		)
	Total operating income	27,667			26,856
	Interest expense, net	(2,210		)	(846		)
	Other expense, net	(1,840		)	(874		)
	Income before income taxes	$	23,617		$	25,136
	Net revenues by product category are as follows:
		Three Months Ended March 31,
	(In thousands)	2015			2014
	Apparel	$	555,455		$	459,249
	Footwear	160,966			114,044
	Accessories	63,151			51,538
	Total net sales	779,572			624,831
	License revenues	16,938			12,809
	Connected Fitness	8,431			3,967
	Total net revenues	$	804,941		$	641,607

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2015
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 had a customer in North America that individually accounted for 21.5%, 23.4% and 30.9% of accounts receivable as of March 31, 2015, December 31, 2014 and March 31, 2014, respectively. The Company's largest customer accounted for 12.9% and 16.7% of net revenues as of March 31, 2015 and 2014, respectively.
Allowance For Doubtful Accounts	Allowance for Doubtful Accounts
	As of March 31, 2015, December 31, 2014 and March 31, 2014, the allowance for doubtful accounts was $5.4 million, $3.7 million and $3.4 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 $13.0 million and $11.3 million for the three months ended March 31, 2015 and 2014, 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.

Acquisitions_Tables

Acquisitions (Tables)	3 Months Ended
	Mar. 31, 2015
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Business Acquisition, Pro Forma Information [Table Text Block]	The following represents the pro forma consolidated income statement as if MFP had been included in the consolidated results of the Company for the three months ended March 31, 2015 and March 31, 2014:
		Three Months Ended March 31,
	(In thousands)	2015			2014
	Net revenues	$	808,636		$	645,344
	Net Income	10,413			6,807
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 during the three months ended March 31, 2015, including the related estimated useful lives, where applicable:
		MyFitnessPal				Endomondo
		(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		—			0
	Technology	3,200		5		5,000			5
	Trade name	2,300		5		400			5
	Other net assets acquired (net liabilities assumed)	8,896				(1,925		)
	Net assets acquired	$	57,196			$	14,075
	Goodwill	406,731				73,169
	Total fair value of consideration	$	463,927			$	87,244

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2015
Financial Assets And (Liabilities) Measured At Fair Value	Financial assets and (liabilities) measured at fair value are set forth in the table below:
		31-Mar-15							31-Dec-14							31-Mar-14
	(In thousands)	Level 1		Level 2			Level 3		Level 1		Level 2			Level 3		Level 1		Level 2			Level 3
	Derivative foreign currency contracts (see Note 8)	$	—	$	3,187		$	—	$	—	$	806		$	—	$	—	$	62		$	—
	Interest rate swap contracts (see Note 8)	—		(2,535		)	—		—		(607		)	—		—		896			—
	TOLI policies held by the Rabbi Trust	—		4,747			—		—		4,734			—		—		4,638			—
	Deferred Compensation Plan obligations	—		(4,798		)	—		—		(4,525		)	—		—		(3,995		)	—

Risk_Management_and_Derivative1

Risk Management and Derivatives (Tables)	3 Months Ended
	Mar. 31, 2015
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 contracts:
		Three Months Ended March 31,
	(In thousands)	2015			2014
	Unrealized foreign currency exchange rate gains (losses)	$	(21,416	)	$	(655	)
	Realized foreign currency exchange rate gains (losses)	6,341			451
	Unrealized derivative gains (losses)	217			70
	Realized derivative gains (losses)	13,018			(740		)

Earnings_per_Share_Tables

Earnings per Share (Tables)	3 Months Ended
	Mar. 31, 2015
Schedule of Reconciliation of Basic Earnings per Share to Diluted Earnings per Share	The following represents a reconciliation from basic earnings per share to diluted earnings per share:
		Three Months Ended March 31,
	(In thousands, except per share amounts)	2015		2014
	Numerator
	Net income	$	11,728	$	13,538
	Denominator
	Weighted average common shares outstanding	214,697		212,383
	Effect of dilutive securities	4,919		4,529
	Weighted average common shares and dilutive securities outstanding	219,616		216,912
	Earnings per share - basic	$	0.05	$	0.06
	Earnings per share - diluted	$	0.05	$	0.06

Segment_Data_and_Related_Infor1

Segment Data and Related Information (Tables)	3 Months Ended
	Mar. 31, 2015
Reconciliation of Revenue from Segments to Consolidated
		Three Months Ended March 31,
	(In thousands)	2015			2014
	Net revenues
	North America	$	700,512		$	582,537
	Other foreign countries	95,998			55,103
	Connected Fitness	8,431			3,967
	Total net revenues	$	804,941		$	641,607
Reconciliation of Operating Profit (Loss) from Segments to Consolidated
		Three Months Ended March 31,
	(In thousands)	2015			2014
	Operating income (loss)
	North America	$	38,369		$	32,920
	Other foreign countries	4,334			(654		)
	Connected Fitness	(15,036		)	(5,410		)
	Total operating income	27,667			26,856
	Interest expense, net	(2,210		)	(846		)
	Other expense, net	(1,840		)	(874		)
	Income before income taxes	$	23,617		$	25,136
Net Revenues by Product Category	Net revenues by product category are as follows:
		Three Months Ended March 31,
	(In thousands)	2015			2014
	Apparel	$	555,455		$	459,249
	Footwear	160,966			114,044
	Accessories	63,151			51,538
	Total net sales	779,572			624,831
	License revenues	16,938			12,809
	Connected Fitness	8,431			3,967
	Total net revenues	$	804,941		$	641,607

Recovered_Sheet1

Summary Of Significant Accounting Policies (Schedule Of Customers That Accounted For A Large Portion Of Net Revenues And Accounts Receivable) (Detail) (Customer A [Member])	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Net Revenues [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	12.90%	16.70%
Accounts Receivable [Member]
Concentration Risk [Line Items]
Concentration Credit Risk, Percentage	21.50%	30.90%	23.40%

Recovered_Sheet2

Summary Of Significant Accounting Policies (Narrative) (Detail) (USD $)	0 Months Ended	3 Months Ended
In Millions, except Share data, unless otherwise specified	Apr. 14, 2014	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Jan. 05, 2015	Mar. 17, 2015
Summary Of Significant Accounting Policies [Line Items]
Stock Issued During Period, Shares, Stock Splits	1
Allowance for doubtful accounts receivable		$5.40	$3.40	$3.70
Shipping and handling costs		$13	$11.30
Endomondo [Member]
Summary Of Significant Accounting Policies [Line Items]
Business Combination, Step Acquisition, Equity Interest in Acquiree, Percentage					100.00%
MyFitnessPal [Member]
Summary Of Significant Accounting Policies [Line Items]
Business Combination, Step Acquisition, Equity Interest in Acquiree, Percentage						100.00%

Acquisitions_Details

Acquisitions (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2014	Jan. 05, 2015	Mar. 17, 2015
Business Acquisition [Line Items]
Net revenues	$808,636,000		$645,344,000
Proceeds from Lines of Credit	250,000,000	100,000,000	0
Net Income	10,413,000		6,807,000
Endomondo [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	-1,900,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	14,100,000
Business Combination, Step Acquisition, Equity Interest in Acquiree, Percentage					100.00%
Payments to Acquire Businesses					85,000,000
Business Combination, Acquisition Related Costs	600,000			800,000
Goodwill, Acquired During Period	73,169,000
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	87,244,000
MyFitnessPal [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	8,900,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	57,200,000
Business Combination, Step Acquisition, Equity Interest in Acquiree, Percentage						100.00%
Transaction Value						474,000,000
Proceeds from Lines of Credit	400,000,000
Business Combination, Acquisition Related Costs	5,700,000
Goodwill, Acquired During Period	406,731,000
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	463,927,000
Customer Lists [Member] | Endomondo [Member]
Business Acquisition [Line Items]
User base	10,600,000
Finite-Lived Intangible Asset, Useful Life	10 years
Customer Lists [Member] | MyFitnessPal [Member]
Business Acquisition [Line Items]
User base	38,300,000
Finite-Lived Intangible Asset, Useful Life	10 years
Nutrition Database [Member] | Endomondo [Member]
Business Acquisition [Line Items]
User base	0
Finite-Lived Intangible Asset, Useful Life	0 years
Nutrition Database [Member] | MyFitnessPal [Member]
Business Acquisition [Line Items]
User base	4,500,000
Finite-Lived Intangible Asset, Useful Life	10 years
Technology-Based Intangible Assets [Member] | Endomondo [Member]
Business Acquisition [Line Items]
User base	5,000,000
Finite-Lived Intangible Asset, Useful Life	5 years
Technology-Based Intangible Assets [Member] | MyFitnessPal [Member]
Business Acquisition [Line Items]
User base	3,200,000
Finite-Lived Intangible Asset, Useful Life	5 years
Trade Names [Member] | Endomondo [Member]
Business Acquisition [Line Items]
User base	400,000
Finite-Lived Intangible Asset, Useful Life	5 years
Trade Names [Member] | MyFitnessPal [Member]
Business Acquisition [Line Items]
User base	$2,300,000
Finite-Lived Intangible Asset, Useful Life	5 years

Recovered_Sheet3

Credit Facility And Long Term Debt (Detail) (USD $)	3 Months Ended			1 Months Ended	12 Months Ended	1 Months Ended
	Mar. 31, 2015	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2012	Dec. 31, 2012	31-May-14	Dec. 31, 2014
Debt Disclosure [Line Items]
Line of Credit Facility, Initial Borrowing Capacity		$650,000,000
Proceeds from Lines of Credit	250,000,000	100,000,000	0
Payments on revolving credit facility		-100,000,000
Deferred Finance Costs, Net	2,900,000
Commitment fee as percentage of the committed line amount less outstanding borrowings and letters of credit	20.00%
Line of Credit Facility, Amount Outstanding	0		100,000,000				0
Line of Credit Facility, Unused Borrowing Capacity	300,000,000
Long term debt agreements principal outstanding	1,300,000		4,200,000				2,000,000
Repayments of Long-term Debt	7,355,000		1,265,000
Interest Income (Expense), Net	-2,210,000		-846,000
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%
Long-term Debt [Member]
Debt Disclosure [Line Items]
Weighted Average Interest Rate	3.09%		3.20%
Revolving Credit Facility [Member]
Debt Disclosure [Line Items]
Weighted Average Interest Rate	1.31%
New Term Loan [Member]
Debt Disclosure [Line Items]
Weighted Average Interest Rate	1.31%
Delayed Draw Term Loan [Member]
Debt Disclosure [Line Items]
Weighted Average Interest Rate	1.20%
Initial Term Loan [Member]
Debt Disclosure [Line Items]
Weighted Average Interest Rate	1.20%
Term Loan Facility [Member]
Debt Disclosure [Line Items]
Line of Credit Facility, Initial Borrowing Capacity	250,000,000
Line of Credit Facility, Amount Outstanding	400,000,000
Initial Term Loan [Member]
Debt Disclosure [Line Items]
Line of Credit Facility, Amount Outstanding	150,000,000
Delayed Draw Term Loan [Member]
Debt Disclosure [Line Items]
Line of Credit Facility, Amount Outstanding	100,000,000
Prior Revolving Credit Facility [Member]
Debt Disclosure [Line Items]
Credit facility maximum borrowing capacity		325,000,000
Revolving Credit Facility [Member]
Debt Disclosure [Line Items]
Credit facility maximum borrowing capacity	800,000,000
Line of Credit Facility, Initial Borrowing Capacity	400,000,000
Line of Credit Facility, Amount Outstanding	250,000,000
Letter of Credit [Member]
Debt Disclosure [Line Items]
Credit facility maximum borrowing capacity	50,000,000
Swingline Loan [Member]
Debt Disclosure [Line Items]
Credit facility maximum borrowing capacity	50,000,000
New Term Loan [Member]
Debt Disclosure [Line Items]
Line of Credit Facility, Amount Outstanding	150,000,000
Secured Debt [Member]
Debt Disclosure [Line Items]
Debt Facility Term Period				7 years
Weighted Average Interest Rate	1.70%		1.70%
Debt Instrument, Maturity Date				1-Dec-19
Secured Debt	$45,500,000		$47,500,000	$50,000,000	50,000,000		$46,000,000
Secured Debt [Member] | LIBOR Rate [Member]
Debt Disclosure [Line Items]
Debt Instrument, Basis Spread on Variable Rate					1.50%
Line of Credit [Member]
Debt Disclosure [Line Items]
Debt Facility Term Period	5 years
Debt Instrument, Maturity Date						1-May-19
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
EBITDA [Member]
Debt Disclosure [Line Items]
Line of Credit Facility, Covenant Terms	3.5
Interest Expense [Member]
Debt Disclosure [Line Items]
Line of Credit Facility, Covenant Terms	1

Fair_Value_Measurements_Financ

Fair Value Measurements (Financial Assets And (Liabilities) Measured At Fair Value) (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	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	$0
TOLI policies held by the Rabbi Trust	0	0	0
Deferred Compensation Plan obligations	0	0	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	3,187,000	62,000	806,000
TOLI policies held by the Rabbi Trust	4,747,000	4,638,000	4,734,000
Deferred Compensation Plan obligations	-4,798,000	-3,995,000	-4,525,000
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	0
TOLI policies held by the Rabbi Trust	0	0	0
Deferred Compensation Plan obligations	0	0	0
Interest Rate Swap [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Net	664,400	68,900
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	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	-2,535,000	896,000	-607,000
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	$0

Fair_Value_Measurements_Narrat

Fair Value Measurements (Narrative) (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Debt Instrument [Line Items]
Debt instrument, carrying value	$1,300,000	$2,000,000	$4,200,000
Fair Value, Inputs, Level 1 [Member]
Debt Instrument [Line Items]
Foreign Currency Contract, Asset, Fair Value Disclosure	$0	$0	$0

StockBased_Compensation_Detail

Stock-Based Compensation (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Sep. 30, 2014	Mar. 31, 2014
Performance-Based Restricted Stock Units Granted in 2015 [Domain]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	0.7
Performance-Based Options Granted in 2015 [Domain]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	0.3
Performance-Based Restricted Stock Units Granted in 2013 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Additional stock-based compensation that would have been recorded if operating income targets had been deemed probable	1.3
Performance Based Restricted Stock Units Granted In 2014 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense, Cumulative Adjustment		3.8
Additional stock-based compensation that would have been recorded if operating income targets had been deemed probable	3.5
Performance Based Restricted Stock Units Granted In 2012 & 2013 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense, Cumulative Adjustment			$6.60
Performance Based Restricted Stock Units [Member] | Stock Vesting On February Two Thousand Sixteen [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Annual Vesting Percentage	33.33%
Performance Based Restricted Stock Units [Member] | Stock Vesting In February Two Thousand Eighteen [Domain]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Annual Vesting Percentage	33.33%
Performance Based Restricted Stock Units [Member] | Stock Vesting In February Two Thousand Nineteen [Domain]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Annual Vesting Percentage	33.33%
MyFitnessPal [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, Gross	0.3

Recovered_Sheet4

Risk Management And Derivatives (Narrative) (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Derivative [Line Items]
Maturity of foreign currency forward contract	8 months
Foreign Currency Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	$400,000
Notional Amount of Interest Rate Derivatives	309,000,000
Derivative, Lower Remaining Maturity Range	1 month
Interest Rate Swap [Member]
Derivative [Line Items]
Notional Amount of Interest Rate Derivatives	183,800,000
Derivative Instruments, Gain (Loss) Recognized in Income, Net	664,400	68,900
Fair Value, Inputs, Level 2 [Member]
Derivative [Line Items]
Foreign Currency Contract, Asset, Fair Value Disclosure	3,187,000	62,000	806,000
Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Interest Rate Derivatives, at Fair Value, Net	($2,535,000)	$896,000	($607,000)

Recovered_Sheet5

Risk Management And Derivatives (Changes In Foreign Currency Exchange Rates And Derivative Foreign Currency Forward Contracts) (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Foreign Currency Exchange Gain Loss [Line Items]
Maturity of foreign currency forward contract	8 months
Unrealized foreign currency exchange rate gains (losses)	($21,416)	($655)
Realized foreign currency exchange rate gains (losses)	6,341	451
Unrealized derivative gains (losses)	217	70
Realized derivative gains (losses)	-13,018	740
Fair Value, Inputs, Level 2 [Member]
Foreign Currency Exchange Gain Loss [Line Items]
Foreign Currency Contract, Asset, Fair Value Disclosure	$3,187	$62	$806

Provision_For_Income_Taxes_Det

Provision For Income Taxes (Detail)	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2015
Provision For Income Taxes [Line Items]
Effective tax rate	50.30%	46.10%
Scenario, Forecast [Member]
Provision For Income Taxes [Line Items]
Expected Effective Income Tax Rate Continuing Operations			41.00%

Earnings_Per_Share_Schedule_Of

Earnings Per Share (Schedule Of Reconciliation Of Basic Earnings Per Share To Diluted Earnings Per Share) (Detail) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income	$11,728	$13,538
Weighted average common shares outstanding	214,697	212,383
Effect of dilutive securities	4,919	4,529
Weighted average common shares and dilutive securities outstanding	219,616	216,912
Earnings per share - basic	$0.05	$0.06
Earnings per share - diluted	$0.05	$0.06

Earnings_Per_Share_Narrative_D

Earnings Per Share (Narrative) (Detail)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares excluded from the computation of diluted earnings per share	411,800	16,800

Recovered_Sheet6

Segment Data And Related Information (Geographic Distribution Of The Company's Net Revenues And Operating Income) (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Segment Reporting Information [Line Items]
Total net revenues	$804,941	$641,607
Total operating income	27,667	26,856
Interest Income (Expense), Net	-2,210	-846
Other income (expense), net	-1,840	-874
Income before income taxes	23,617	25,136
North America [Member]
Segment Reporting Information [Line Items]
Total net revenues	700,512	582,537
Total operating income	38,369	32,920
Other Foreign Countries [Member]
Segment Reporting Information [Line Items]
Total net revenues	95,998	55,103
Total operating income	4,334	-654
Connected Fitness [Member]
Segment Reporting Information [Line Items]
Total net revenues	8,431	3,967
Total operating income	($15,036)	($5,410)

Recovered_Sheet7

Segment Data And Related Information (Net Revenues By Product Category) (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Segment Reporting Information [Line Items]
Total net sales	$779,572	$624,831
License revenues	16,938	12,809
Apparel [Member]
Segment Reporting Information [Line Items]
Total net sales	555,455	459,249
Footwear [Member]
Segment Reporting Information [Line Items]
Total net sales	160,966	114,044
Accessories [Member]
Segment Reporting Information [Line Items]
Total net sales	63,151	51,538
Connected Fitness [Member]
Segment Reporting Information [Line Items]
Total net sales	$8,431	$3,967