Notes Payable and Long-Term Debt	12 Months Ended
Mar. 31, 2016
Debt Disclosure [Abstract]
Notes Payable and Long-Term Debt	Notes Payable and Long-Term Debt Domestic Line of Credit. In August 2011, the Company entered into a Credit Agreement (Credit Agreement), which was amended and restated in August 2012 (Amended and Restated Credit Agreement) and amended in its entirety in November 2014 (Second Amended and Restated Credit Agreement). The Second Amended and Restated Credit Agreement entered into with JPMorgan Chase Bank, National Association (JPMorgan) as the administrative Agent, Comerica and HSBC as co-syndication agents, and the party lenders thereto, is a five-year, $400,000 secured revolving credit facility that contains a $75,000 sublimit for the issuance of letters of credit and a $5,000 sublimit for swingline loans, and matures on November 13, 2019. Subject to customary conditions and the approval of any lender whose commitment would be increased, the Company has the option to increase the maximum principal amount available under the Second Amended and Restated Credit Agreement by up to an additional $200,000, resulting in a maximum available principal amount of $600,000. None of the lenders under the Second Amended and Restated Credit Agreement has committed at this time or is obligated to provide any such increase in the commitments. In addition to allowing borrowings in US dollars, the Second Amended and Restated Credit Agreement provides a $150,000 sublimit for borrowings in Euros, British pounds and any other currency that is subsequently approved by JPMorgan, each lender and the issuing bank. At the Company's option, revolving loans issued under the Second Amended and Restated Credit Agreement will initially bear interest at either the adjusted London Interbank Offered Rate (LIBOR) for 30 days (0.44% at March 31, 2016) plus 1.25% per annum, in the case of LIBOR borrowings, or at the alternate base rate plus 0.25% per annum, and thereafter the interest rate will fluctuate between adjusted LIBOR plus 1.25% per annum and adjusted LIBOR plus 2.00% per annum (or between the alternate base rate plus 0.25% per annum and the alternate base rate plus 1.00% per annum), based upon the Company's total adjusted leverage ratio at such time. In addition, the Company will initially be required to pay fees of 0.175% per annum on the daily amount of the revolving credit facility, and thereafter the fee rate will fluctuate between 0.175% and 0.30% per annum, based upon the Company's total adjusted leverage ratio. The Company's obligations under the Second Amended and Restated Credit Agreement are guaranteed by the Company's existing and future wholly-owned domestic subsidiaries (other than certain immaterial subsidiaries, foreign subsidiaries, foreign subsidiary holding companies and specified excluded subsidiaries) (the Guarantors), and is secured by a first-priority security interest in substantially all of the assets of the Company and the Guarantors, including all or a portion of the equity interests of certain of the Company's domestic and first-tier foreign subsidiaries. The Second Amended and Restated Credit Agreement contains financial covenants which include: the total adjusted leverage ratio must not be greater than 3.25 to 1.00; the sum of the consolidated annual earnings before interest, taxes, depreciation, and amortization (EBITDA) and annual rental expense, divided by the sum of the annual interest expense and the annual rental expense must be greater than 2.25 to 1.00 on a pro forma basis; and other customary limitations. The Second Amended and Restated Credit Agreement contains certain other covenants which include: the maximum amount paid for capital expenditures may not exceed $110,000 per year if the total adjusted leverage ratio is equal to or exceeds 2.75 to 1.00; the maximum additional unsecured debt may not exceed $200,000; the Company may not have aggregate ERISA events that are considered materially adverse; the Company may not have a change of control (as defined in the Second Amended and Restated Credit Agreement); and no restrictions on dividends, share repurchases or acquisitions may be made if the total adjusted leverage ratio does not exceed 2.75 to 1.00 on a pro forma basis. In August 2015, the Company entered into Amendment 1 to the Second Amended and Restated Credit Agreement to add certain foreign subsidiaries as borrowers. During the year ended March 31, 2016, the Company borrowed $426,000 and repaid $373,000. At March 31, 2016, the Company had outstanding borrowings of $53,000 under the Second Amended and Restated Credit Agreement, as amended and had outstanding letters of credit of approximately $700. As a result, the unused balance under the Second Amended and Restated Credit Agreement, as amended was approximately $346,300 at March 31, 2016. At March 31, 2016, the Company had a remaining balance of approximately $1,300 in deferred financing costs related to the Amended and Restated Credit Agreement of August 2012 and Second Amended and Restated Agreement of November 2014 included in prepaid expenses. This amount is being amortized over the term of the Second Amended and Restated Credit Agreement using the straight-line method. At March 31, 2016, the Company was in compliance with all financial covenants. Subsequent to March 31, 2016, the Company borrowed $76,000 and repaid $16,000 resulting in a total outstanding balance of $113,000 under the Second Amended and Restated Credit Agreement, at May 31, 2016. China Line of Credit. In August 2013, Deckers (Beijing) Trading Co., LTD, a fully owned subsidiary, entered into a credit facility in China (China Credit Facility) that provides for an uncommitted revolving line of credit of up to CNY 60,000, or approximately $10,000, in the quarters ending September 30 and December 31 and CNY 20,000, or approximately $3,300, in the quarters ending March 31 and June 30. The China Credit Facility is payable on demand and subject to annual review and renewal. The obligations under the China Credit Facility are guaranteed by the Company for 110% of the facility amount in USD. In December 2013, the China Credit Facility was revised to provide for the uncommitted revolving line of credit of up to CNY 60,000 to be extended to the entire year. In October 2014, the China Credit Facility was amended (Amended China Credit Facility) to include, among other things, an extension of the aggregate period of borrowing from 12 months to 18 months. In October 2015, the Amended China Credit Facility was amended (Second Amended China Credit Facility) to include an increase in the uncommitted revolving line of credit of up to CNY 150,000, or approximately $23,000, including a sublimit of CNY 50,000, or approximately $8,000, for the Company's fully owned subsidiary, Deckers Footwear (Shanghai) Co., LTD. During the year ended March 31, 2016, the Company borrowed approximately $23,200 and repaid $14,100 under the Second Amended China Credit Facility for total outstanding borrowings of approximately $14,000 under the Second Amended China Credit Facility at March 31, 2016. Interest is based on the People’s Bank of China rate, which was 4.35% at March 31, 2016. Subsequent to March 31, 2016, the Company repaid $4,800 resulting in a total outstanding balance of $9,200 under the Second Amended China Credit Facility at May 31, 2016. Japan Line of Credit. In March 2016, Deckers Japan, G.K., a fully owned subsidiary, entered into a credit facility in Japan (Japan Credit Facility) that provides for an uncommitted bilateral revolving line of credit of up to JPY 5,500,000, or approximately $49,000, for a maximum term of six months. The Japan Credit Facility renews annually, and it is guaranteed by the Company. Interest is based on the Tokyo Interbank Offered Rate (TIBOR) for three months plus 0.40%. At March 31, 2016, TIBOR for three months was 0.10% and the effective interest rate was 0.50%. The Japan Credit Facility has customary covenants including not having losses for two consecutive years, maintaining an interest coverage ratio of greater than one and maintaining higher assets than liabilities. At March 31, 2016, the Company had no borrowings under the Japan Credit Facility. Mortgage. In July 2014, the Company obtained a mortgage secured by its corporate headquarters property for approximately $33,900. At March 31, 2016, the outstanding balance under the mortgage was approximately $33,200, which includes approximately $600 in short-term borrowings and approximately $32,600 in mortgage payable in the consolidated balance sheet. The mortgage has a fixed interest rate of 4.928%. Payments include interest and principal in an amount that amortizes the principal balance over a 30-year period; however, the loan will mature and have a balloon payment due on July 1, 2029 of approximately $23,400. Minimum principal payments over the next 5 years are approximately $2,900. In December 2014, the mortgage financial covenants were amended to be consistent with the financial covenants of the Second Amended and Restated Credit Agreement as discussed above.

Notes Payable and Long-Term Debt

Domestic Line of Credit. In August 2011, the Company entered into a Credit Agreement (Credit Agreement), which was amended and restated in August 2012 (Amended and Restated Credit Agreement) and amended in its entirety in November 2014 (Second Amended and Restated Credit Agreement). The Second Amended and Restated Credit Agreement entered into with JPMorgan Chase Bank, National Association (JPMorgan) as the administrative Agent, Comerica and HSBC as co-syndication agents, and the party lenders thereto, is a five-year, $400,000 secured revolving credit facility that contains a $75,000 sublimit for the issuance of letters of credit and a $5,000 sublimit for swingline loans, and matures on November 13, 2019. Subject to customary conditions and the approval of any lender whose commitment would be increased, the Company has the option to increase the maximum principal amount available under the Second Amended and Restated Credit Agreement by up to an additional $200,000, resulting in a maximum available principal amount of $600,000. None of the lenders under the Second Amended and Restated Credit Agreement has committed at this time or is obligated to provide any such increase in the commitments. In addition to allowing borrowings in US dollars, the Second Amended and Restated Credit Agreement provides a $150,000 sublimit for borrowings in Euros, British pounds and any other currency that is subsequently approved by JPMorgan, each lender and the issuing bank.

At the Company's option, revolving loans issued under the Second Amended and Restated Credit Agreement will initially bear interest at either the adjusted London Interbank Offered Rate (LIBOR) for 30 days (0.44% at March 31, 2016) plus 1.25% per annum, in the case of LIBOR borrowings, or at the alternate base rate plus 0.25% per annum, and thereafter the interest rate will fluctuate between adjusted LIBOR plus 1.25% per annum and adjusted LIBOR plus 2.00% per annum (or between the alternate base rate plus 0.25% per annum and the alternate base rate plus 1.00% per annum), based upon the Company's total adjusted leverage ratio at such time. In addition, the Company will initially be required to pay fees of 0.175% per annum on the daily amount of the revolving credit facility, and thereafter the fee rate will fluctuate between 0.175% and 0.30% per annum, based upon the Company's total adjusted leverage ratio.

The Company's obligations under the Second Amended and Restated Credit Agreement are guaranteed by the Company's existing and future wholly-owned domestic subsidiaries (other than certain immaterial subsidiaries, foreign subsidiaries, foreign subsidiary holding companies and specified excluded subsidiaries) (the Guarantors), and is secured by a first-priority security interest in substantially all of the assets of the Company and the Guarantors, including all or a portion of the equity interests of certain of the Company's domestic and first-tier foreign subsidiaries.

The Second Amended and Restated Credit Agreement contains financial covenants which include: the total adjusted leverage ratio must not be greater than 3.25 to 1.00; the sum of the consolidated annual earnings before interest, taxes, depreciation, and amortization (EBITDA) and annual rental expense, divided by the sum of the annual interest expense and the annual rental expense must be greater than 2.25 to 1.00 on a pro forma basis; and other customary limitations. The Second Amended and Restated Credit Agreement contains certain other covenants which include: the maximum amount paid for capital expenditures may not exceed $110,000 per year if the total adjusted leverage ratio is equal to or exceeds 2.75 to 1.00; the maximum additional unsecured debt may not exceed $200,000; the Company may not have aggregate ERISA events that are considered materially adverse; the Company may not have a change of control (as defined in the Second Amended and Restated Credit Agreement); and no restrictions on dividends, share repurchases or acquisitions may be made if the total adjusted leverage ratio does not exceed 2.75 to 1.00 on a pro forma basis.

In August 2015, the Company entered into Amendment 1 to the Second Amended and Restated Credit Agreement to add certain foreign subsidiaries as borrowers. During the year ended March 31, 2016, the Company borrowed $426,000 and repaid $373,000. At March 31, 2016, the Company had outstanding borrowings of $53,000 under the Second Amended and Restated Credit Agreement, as amended and had outstanding letters of credit of approximately $700. As a result, the unused balance under the Second Amended and Restated Credit Agreement, as amended was approximately $346,300 at March 31, 2016. At March 31, 2016, the Company had a remaining balance of approximately $1,300 in deferred financing costs related to the Amended and Restated Credit Agreement of August 2012 and Second Amended and Restated Agreement of November 2014 included in prepaid expenses. This amount is being amortized over the term of the Second Amended and Restated Credit Agreement using the straight-line method. At March 31, 2016, the Company was in compliance with all financial covenants.

Subsequent to March 31, 2016, the Company borrowed $76,000 and repaid $16,000 resulting in a total outstanding balance of $113,000 under the Second Amended and Restated Credit Agreement, at May 31, 2016.

China Line of Credit. In August 2013, Deckers (Beijing) Trading Co., LTD, a fully owned subsidiary, entered into a credit facility in China (China Credit Facility) that provides for an uncommitted revolving line of credit of up to CNY 60,000, or approximately $10,000, in the quarters ending September 30 and December 31 and CNY 20,000, or approximately $3,300, in the quarters ending March 31 and June 30. The China Credit Facility is payable on demand and subject to annual review and renewal. The obligations under the China Credit Facility are guaranteed by the Company for 110% of the facility amount in USD. In December 2013, the China Credit Facility was revised to provide for the uncommitted revolving line of credit of up to CNY 60,000 to be extended to the entire year. In October 2014, the China Credit Facility was amended (Amended China Credit Facility) to include, among other things, an extension of the aggregate period of borrowing from 12 months to 18 months. In October 2015, the Amended China Credit Facility was amended (Second Amended China Credit Facility) to include an increase in the uncommitted revolving line of credit of up to CNY 150,000, or approximately $23,000, including a sublimit of CNY 50,000, or approximately $8,000, for the Company's fully owned subsidiary, Deckers Footwear (Shanghai) Co., LTD. During the year ended March 31, 2016, the Company borrowed approximately $23,200 and repaid $14,100 under the Second Amended China Credit Facility for total outstanding borrowings of approximately $14,000 under the Second Amended China Credit Facility at March 31, 2016. Interest is based on the People’s Bank of China rate, which was 4.35% at March 31, 2016.

Subsequent to March 31, 2016, the Company repaid $4,800 resulting in a total outstanding balance of $9,200 under the Second Amended China Credit Facility at May 31, 2016.

Japan Line of Credit. In March 2016, Deckers Japan, G.K., a fully owned subsidiary, entered into a credit facility in Japan (Japan Credit Facility) that provides for an uncommitted bilateral revolving line of credit of up to JPY 5,500,000, or approximately $49,000, for a maximum term of six months. The Japan Credit Facility renews annually, and it is guaranteed by the Company. Interest is based on the Tokyo Interbank Offered Rate (TIBOR) for three months plus 0.40%. At March 31, 2016, TIBOR for three months was 0.10% and the effective interest rate was 0.50%. The Japan Credit Facility has customary covenants including not having losses for two consecutive years, maintaining an interest coverage ratio of greater than one and maintaining higher assets than liabilities. At March 31, 2016, the Company had no borrowings under the Japan Credit Facility.

Mortgage. In July 2014, the Company obtained a mortgage secured by its corporate headquarters property for approximately $33,900. At March 31, 2016, the outstanding balance under the mortgage was approximately $33,200, which includes approximately $600 in short-term borrowings and approximately $32,600 in mortgage payable in the consolidated balance sheet. The mortgage has a fixed interest rate of 4.928%. Payments include interest and principal in an amount that amortizes the principal balance over a 30-year period; however, the loan will mature and have a balloon payment due on July 1, 2029 of approximately $23,400. Minimum principal payments over the next 5 years are approximately $2,900. In December 2014, the mortgage financial covenants were amended to be consistent with the financial covenants of the Second Amended and Restated Credit Agreement as discussed above.