Summary of Significant Accounting Policies	12 Months Ended
Dec. 31, 2016
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 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. On March 16, 2016, the Board of Directors approved the issuance of the Company’s new Class C non-voting common stock, referred to as the Class C stock. The Class C stock was issued through a stock dividend on a one-for-one basis to all existing holders of the Company's Class A and Class B common stock. The shares of Class C stock were distributed on April 7, 2016, to stockholders of record of Class A and Class B common stock as of March 28, 2016. Stockholders' equity and all references to share and per share amounts in the accompanying consolidated financial statements have been retroactively adjusted to reflect this one-for-one stock dividend. On June 3, 2016, the Board of Directors approved the payment of a $59.0 million dividend to the holders of the Company's Class C stock in connection with shareholder litigation related to the creation of the Class C stock. The Company's Board of Directors approved the payment of this dividend in the form of additional shares of Class C stock, with cash in lieu of any fractional shares. This dividend was distributed on June 29, 2016, in the form of 1,470,256 shares of Class C stock and $2.9 million in cash. 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, 2016, 2015 and 2014 was interest income of $257.7 thousand, $164.0 thousand and $192.0 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 16% and 19% of accounts receivable as of December 31, 2016 and December 31, 2015, respectively. The Company's largest customer accounted for 10%, 12% and 14% of net revenues for the years ended December 31, 2016, 2015 and 2014, 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, 2016 and 2015, the allowance for doubtful accounts was $11.3 million and $5.9 million, respectively. 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 its inventory at standard cost which approximates landed cost, 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 $1.8 million and $1.0 million as of December 31, 2016 and 2015, 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. The Company calculates 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 the Company expects the reporting unit to generate in the future. The Company's significant estimates in the discounted cash flows model include: the Company's 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, 2016, no impairment of goodwill was identified and the fair value of each reporting unit substantially exceeded its carrying value. The Connected Fitness valuation is dependent upon revenue growth assumptions. If the performance of this reporting unit does not meet expectations it could have a material impact on the fair value of the reporting unit. 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, 2016, accrued expenses primarily included $60.8 million and $24.7 million of accrued compensation and benefits and marketing expenses, respectively. At December 31, 2015, accrued expenses primarily included $63.8 million and $17.8 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 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 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 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, 2016 and 2015, there were $146.2 million and $94.5 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 $477.5 million, $417.8 million and $333.0 million for the years ended December 31, 2016, 2015 and 2014, respectively. At December 31, 2016 and 2015, prepaid advertising costs were $32.0 million and $37.5 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 $89.9 million, $63.7 million and $55.3 million for the years ended December 31, 2016, 2015 and 2014, 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, 2016 and 2015, the carrying value of the Company’s investment was $11.7 million and $12.0 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, 2016 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 10 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 and Class C Common Stock upon exercise of stock options, grant of restricted stock or share unit conversion. Refer to Note 11 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. As of December 31, 2016, the fair value of the Company's Senior Notes is $568.1 million. The fair value of the Company's other 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 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 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 Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update ("ASU") 2014-09, which supersedes the most current revenue recognition requirements. This ASU 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. In 2016, the FASB issued ASUs 2016-08, 2016-10, 2016-11 and 2016-12, which provide supplemental adoption guidance and clarification to ASU 2014-09. These ASUs will be effective for annual and interim periods beginning after December 15, 2017 with early adoption for annual and interim periods beginning after December 15, 2016 permitted and should be applied retrospectively to each prior reporting period presented or as a cumulative effect adjustment as of the date of adoption. The Company currently anticipates adopting the guidance in this new ASU effective January 1, 2018. This ASU permits two methods of adoption: retrospectively to each prior reporting period presented (full retrospective method), or retrospectively with the cumulative effect of initially applying the guidance recognized at the date of initial application (the modified retrospective method). The Company has not yet determined its adoption method. The Company has identified a committee, agreed on a methodology for review of its revenue arrangements and initiated the review process for adoption of this ASU, and is evaluating the impact on its consolidated financial statements. In February 2016, the FASB issued ASU 2016-02, which amends the existing guidance for leases and will require recognition of operating leases with lease terms of more than twelve months and all financing leases on the balance sheet. For these leases, companies will record assets for the rights and liabilities for the obligations that are created by the leases. This ASU will require disclosures that provide qualitative and quantitative information for the lease assets and liabilities recorded in the financial statements. This ASU is effective for fiscal years beginning after December 15, 2018. The Company is currently evaluating this ASU to determine the impact of its adoption on its consolidated financial statements. The Company currently anticipates adopting the new standard effective January 1, 2019. The Company has formed a committee and initiated the review process for adoption of this ASU. While the Company is still in the process of completing its analysis on the complete impact this ASU will have on its consolidated financial statements and related disclosures, it expects the ASU to have a material impact on its consolidated balance sheet for recognition of lease-related assets and liabilities. In March 2016, the FASB issued ASU 2016-09, which effects all entities that issue share-based payment awards to their employees. The amendments in this ASU cover such areas as the recognition of excess tax benefits and deficiencies, the classification of those excess tax benefits on the statement of cash flows, an accounting policy election for forfeitures, the amount an employer can withhold to cover income taxes and still qualify for equity classification and the classification of those taxes paid on the statement of cash flows. This ASU is effective for annual and interim periods beginning after December 15, 2016. This guidance can be applied either prospectively, retrospectively or using a modified retrospective transition method. Early adoption is permitted. The Company will not early adopt this ASU. The adoption of this guidance may have a material impact on the Company's effective tax rate and income tax expense, depending in part on whether significant employee stock option exercises occur. In August 2016, the FASB issued ASU 2016-15, which eliminates the diversity in practice related to the classification of certain cash receipts and payments in the statement of cash flows, by adding or clarifying guidance on eight specific cash flow issues. This ASU is effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. The Company does not believe this ASU will have a material impact on its consolidated financial statements. In October 2016, the FASB issued ASU 2016-16, which will require an entity to recognize the income tax consequences of an intra-entity transfer of an asset, other than inventory, when the transfer occurs. This ASU is effective for annual and interim periods beginning after December 15, 2017, with early adoption permitted in the first interim period of 2017. Upon adoption, any deferred charge established upon an intra-company transfer would be recorded as a cumulative-effect adjustment to retained earnings. At December 31, 2016, the Company had a deferred charge of $26.0 million with $1.8 million and $24.2 million recorded within Prepaid expenses and Other long term assets, respectively. The Company plans to adopt this ASU during the interim period ending March 31, 2017. Recently Adopted Accounting Standards In April 2015, the FASB issued ASU 2015-03, which requires costs incurred to issue debt to be presented in the balance sheet as a direct deduction from the carrying value of the debt. This ASU is effective for annual and interim reporting periods beginning after December 15, 2015, with early adoption permitted. The Company adopted the provisions of this ASU in the first quarter of 2016, and reclassified approximately $2.9 million from "Other long term assets" to "Long term debt, net of current maturities" as of December 31, 2015.

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 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.

On March 16, 2016, the Board of Directors approved the issuance of the Company’s new Class C non-voting common stock, referred to as the Class C stock. The Class C stock was issued through a stock dividend on a one-for-one basis to all existing holders of the Company's Class A and Class B common stock. The shares of Class C stock were distributed on April 7, 2016, to stockholders of record of Class A and Class B common stock as of March 28, 2016. Stockholders' equity and all references to share and per share amounts in the accompanying consolidated financial statements have been retroactively adjusted to reflect this one-for-one stock dividend.

On June 3, 2016, the Board of Directors approved the payment of a $59.0 million dividend to the holders of the Company's Class C stock in connection with shareholder litigation related to the creation of the Class C stock. The Company's Board of Directors approved the payment of this dividend in the form of additional shares of Class C stock, with cash in lieu of any fractional shares. This dividend was distributed on June 29, 2016, in the form of 1,470,256 shares of Class C stock and $2.9 million in cash.

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, 2016, 2015 and 2014 was interest income of $257.7 thousand, $164.0 thousand and $192.0 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 16% and 19% of accounts receivable as of December 31, 2016 and December 31, 2015, respectively. The Company's largest customer accounted for 10%, 12% and 14% of net revenues for the years ended December 31, 2016, 2015 and 2014, 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, 2016 and 2015, the allowance for doubtful accounts was $11.3 million and $5.9 million, respectively.

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 its inventory at standard cost which approximates landed cost, 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 $1.8 million and $1.0 million as of December 31, 2016 and 2015, 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. The Company calculates 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 the Company expects the reporting unit to generate in the future. The Company's significant estimates in the discounted cash flows model include: the Company's 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, 2016, no impairment of goodwill was identified and the fair value of each reporting unit substantially exceeded its carrying value. The Connected Fitness valuation is dependent upon revenue growth assumptions. If the performance of this reporting unit does not meet expectations it could have a material impact on the fair value of the reporting unit.

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, 2016, accrued expenses primarily included $60.8 million and $24.7 million of accrued compensation and benefits and marketing expenses, respectively. At December 31, 2015, accrued expenses primarily included $63.8 million and $17.8 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 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 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 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, 2016 and 2015, there were $146.2 million and $94.5 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 $477.5 million, $417.8 million and $333.0 million for the years ended December 31, 2016, 2015 and 2014, respectively. At December 31, 2016 and 2015, prepaid advertising costs were $32.0 million and $37.5 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 $89.9 million, $63.7 million and $55.3 million for the years ended December 31, 2016, 2015 and 2014, 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, 2016 and 2015, the carrying value of the Company’s investment was $11.7 million and $12.0 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, 2016 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 10 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 and Class C Common Stock upon exercise of stock options, grant of restricted stock or share unit conversion. Refer to Note 11 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. As of December 31, 2016, the fair value of the Company's Senior Notes is $568.1 million. The fair value of the Company's other 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 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 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 Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update ("ASU") 2014-09, which supersedes the most current revenue recognition requirements. This ASU 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. In 2016, the FASB issued ASUs 2016-08, 2016-10, 2016-11 and 2016-12, which provide supplemental adoption guidance and clarification to ASU 2014-09. These ASUs will be effective for annual and interim periods beginning after December 15, 2017 with early adoption for annual and interim periods beginning after December 15, 2016 permitted and should be applied retrospectively to each prior reporting period presented or as a cumulative effect adjustment as of the date of adoption. The Company currently anticipates adopting the guidance in this new ASU effective January 1, 2018. This ASU permits two methods of adoption: retrospectively to each prior reporting period presented (full retrospective method), or retrospectively with the cumulative effect of initially applying the guidance recognized at the date of initial application (the modified retrospective method). The Company has not yet determined its adoption method. The Company has identified a committee, agreed on a methodology for review of its revenue arrangements and initiated the review process for adoption of this ASU, and is evaluating the impact on its consolidated financial statements.

In February 2016, the FASB issued ASU 2016-02, which amends the existing guidance for leases and will require recognition of operating leases with lease terms of more than twelve months and all financing leases on the balance sheet. For these leases, companies will record assets for the rights and liabilities for the obligations that are created by the leases. This ASU will require disclosures that provide qualitative and quantitative information for the lease assets and liabilities recorded in the financial statements. This ASU is effective for fiscal years beginning after December 15, 2018. The Company is currently evaluating this ASU to determine the impact of its adoption on its consolidated financial statements. The Company currently anticipates adopting the new standard effective January 1, 2019. The Company has formed a committee and initiated the review process for adoption of this ASU. While the Company is still in the process of completing its analysis on the complete impact this ASU will have on its consolidated financial statements and related disclosures, it expects the ASU to have a material impact on its consolidated balance sheet for recognition of lease-related assets and liabilities.

In March 2016, the FASB issued ASU 2016-09, which effects all entities that issue share-based payment awards to their employees. The amendments in this ASU cover such areas as the recognition of excess tax benefits and deficiencies, the classification of those excess tax benefits on the statement of cash flows, an accounting policy election for forfeitures, the amount an employer can withhold to cover income taxes and still qualify for equity classification and the classification of those taxes paid on the statement of cash flows. This ASU is effective for annual and interim periods beginning after December 15, 2016. This guidance can be applied either prospectively, retrospectively or using a modified retrospective transition method. Early adoption is permitted. The Company will not early adopt this ASU. The adoption of this guidance may have a material impact on the Company's effective tax rate and income tax expense, depending in part on whether significant employee stock option exercises occur.

In August 2016, the FASB issued ASU 2016-15, which eliminates the diversity in practice related to the classification of certain cash receipts and payments in the statement of cash flows, by adding or clarifying guidance on eight specific cash flow issues. This ASU is effective for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. The Company does not believe this ASU will have a material impact on its consolidated financial statements.

In October 2016, the FASB issued ASU 2016-16, which will require an entity to recognize the income tax consequences of an intra-entity transfer of an asset, other than inventory, when the transfer occurs. This ASU is effective for annual and interim periods beginning after December 15, 2017, with early adoption permitted in the first interim period of 2017. Upon adoption, any deferred charge established upon an intra-company transfer would be recorded as a cumulative-effect adjustment to retained earnings. At December 31, 2016, the Company had a deferred charge of $26.0 million with $1.8 million and $24.2 million recorded within Prepaid expenses and Other long term assets, respectively. The Company plans to adopt this ASU during the interim period ending March 31, 2017.

Recently Adopted Accounting Standards

In April 2015, the FASB issued ASU 2015-03, which requires costs incurred to issue debt to be presented in the balance sheet as a direct deduction from the carrying value of the debt. This ASU is effective for annual and interim reporting periods beginning after December 15, 2015, with early adoption permitted. The Company adopted the provisions of this ASU in the first quarter of 2016, and reclassified approximately $2.9 million from "Other long term assets" to "Long term debt, net of current maturities" as of December 31, 2015.