Notes Payable and Long Term Debt	6 Months Ended
Sep. 30, 2016
Debt Disclosure [Abstract]
Notes Payable and Long Term Debt	Notes Payable and Long Term Debt Domestic Line of Credit. In August 2015, the Company entered into an amendment to the Second Amended and Restated Credit Agreement with JPMorgan Chase Bank, National Association (as amended, Second Amended and Restated Credit Agreement) to add certain foreign subsidiaries as borrowers. At September 30, 2016, the Company had $255,000 of outstanding borrowings under the Second Amended and Restated Credit Agreement and outstanding letters of credit of approximately $600. As a result, the available borrowings under the Second Amended and Restated Credit Agreement were approximately $144,400 as of September 30, 2016. Amounts outstanding are included in short-term borrowings in the condensed consolidated balance sheet at September 30, 2016 and March 31, 2016. Interest is tied to the prime rate or, at the Company's election, to the adjusted London Interbank Offered Rate. At September 30, 2016, the effective and prime interest rates were 2.03% and 4.00%, respectively. In October 2016, the Company amended the Second Amended and Restated Credit Agreement to allow increased borrowing under its credit facility in China (as amended by the first amendment and second amendment described below, the Second Amended China Credit Facility). At November 9, 2016, the Company had a total outstanding balance of approximately $266,600 and available borrowings of approximately $133,400. China Line of Credit. In October 2015, the Company entered into a first amendment to its credit facility in China to provide for an increase in the uncommitted revolving line of credit to CNY 150,000, or approximately $22,500, including a sublimit of CNY 50,000, or approximately $7,500, for the Company's wholly owned subsidiary, Deckers Footwear (Shanghai) Co., LTD. During the quarter ended September 30, 2016, the Company borrowed approximately $13,500 under the Second Amended China Credit Facility, resulting in a total outstanding balance of approximately $22,500 and no available borrowings at September 30, 2016. Amounts outstanding are included in short-term borrowings in the condensed consolidated balance sheet at September 30, 2016. Interest is based on the People’s Bank of China rate, which was 4.35% at September 30, 2016. In October 2016, the Company entered into a second amendment to its credit facility with China to provide for an increase in the line of credit to an aggregate of CNY 300,000, or approximately $45,000. At November 9, 2016, the Company had a total outstanding balance of approximately $16,500 and available borrowings of approximately $28,500. Japan Line of Credit. In March 2016, Deckers Japan, G.K., a wholly owned subsidiary of the Company, 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 $54,000, for a maximum term of six months for each draw on the facility. The Japan Credit Facility renews annually, and is guaranteed by the Company. Interest is based on the Tokyo Interbank Offered Rate for three months plus 0.40%. At September 30, 2016, the effective interest rate was 0.46%. At September 30, 2016, the Company had no outstanding borrowings. At November 9, 2016, the Company had a total outstanding balance of approximately $21,000 and available borrowings of approximately $33,000.

Notes Payable and Long Term Debt

Domestic Line of Credit. In August 2015, the Company entered into an amendment to the Second Amended and Restated Credit Agreement with JPMorgan Chase Bank, National Association (as amended, Second Amended and Restated Credit Agreement) to add certain foreign subsidiaries as borrowers. At September 30, 2016, the Company had $255,000 of outstanding borrowings under the Second Amended and Restated Credit Agreement and outstanding letters of credit of approximately $600. As a result, the available borrowings under the Second Amended and Restated Credit Agreement were approximately $144,400 as of September 30, 2016. Amounts outstanding are included in short-term borrowings in the condensed consolidated balance sheet at September 30, 2016 and March 31, 2016. Interest is tied to the prime rate or, at the Company's election, to the adjusted London Interbank Offered Rate. At September 30, 2016, the effective and prime interest rates were 2.03% and 4.00%, respectively. In October 2016, the Company amended the Second Amended and Restated Credit Agreement to allow increased borrowing under its credit facility in China (as amended by the first amendment and second amendment described below, the Second Amended China Credit Facility). At November 9, 2016, the Company had a total outstanding balance of approximately $266,600 and available borrowings of approximately $133,400.

China Line of Credit. In October 2015, the Company entered into a first amendment to its credit facility in China to provide for an increase in the uncommitted revolving line of credit to CNY 150,000, or approximately $22,500, including a sublimit of CNY 50,000, or approximately $7,500, for the Company's wholly owned subsidiary, Deckers Footwear (Shanghai) Co., LTD. During the quarter ended September 30, 2016, the Company borrowed approximately $13,500 under the Second Amended China Credit Facility, resulting in a total outstanding balance of approximately $22,500 and no available borrowings at September 30, 2016. Amounts outstanding are included in short-term borrowings in the condensed consolidated balance sheet at September 30, 2016. Interest is based on the People’s Bank of China rate, which was 4.35% at September 30, 2016. In October 2016, the Company entered into a second amendment to its credit facility with China to provide for an increase in the line of credit to an aggregate of CNY 300,000, or approximately $45,000. At November 9, 2016, the Company had a total outstanding balance of approximately $16,500 and available borrowings of approximately $28,500.

Japan Line of Credit. In March 2016, Deckers Japan, G.K., a wholly owned subsidiary of the Company, 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 $54,000, for a maximum term of six months for each draw on the facility. The Japan Credit Facility renews annually, and is guaranteed by the Company. Interest is based on the Tokyo Interbank Offered Rate for three months plus 0.40%. At September 30, 2016, the effective interest rate was 0.46%. At September 30, 2016, the Company had no outstanding borrowings. At November 9, 2016, the Company had a total outstanding balance of approximately $21,000 and available borrowings of approximately $33,000.