Revolving Credit Facilities and Mortgage Payable	3 Months Ended
Jun. 30, 2018
Debt Disclosure [Abstract]
Revolving Credit Facilities and Mortgage Payable	Revolving Credit Facilities and Mortgage Payable Domestic Credit Facility In November 2014, the Company amended its revolving credit facility agreement with JPMorgan Chase Bank, National Association, as the administrative agent, Comerica and HSBC as co-syndication agents, and the lenders party thereto (as amended, Second Amended and Restated Credit Agreement). The Second Amended and Restated Credit Agreement provides for a five-year, $400,000 secured revolving credit facility (Domestic Credit Facility) which contains a $75,000 sublimit for the issuance of letters of credit and a $5,000 sublimit for swing line loans, and which matures on November 13, 2019. At the Company's election, interest under the Domestic Credit Facility is tied to the adjusted London Interbank Offered Rate (LIBOR) or the Alternative Base Rate (ABR), and is variable based on the Company's total adjusted leverage ratio. As of June 30, 2018, the adjusted LIBOR and ABR rates were 3.34% and 5.25%, respectively. During the three months ended June 30, 2018, the Company made no borrowings or repayments under the Domestic Credit Facility. As of June 30, 2018, the Company had no outstanding balance under the Domestic Credit Facility. As a result, the available borrowings under the Domestic Credit Facility as of June 30, 2018 were $399,451, including outstanding letters of credit of $549. Any amounts outstanding are recorded in short-term borrowings in the condensed consolidated balance sheets. Subsequent to June 30, 2018 through August 3, 2018, the Company made no additional borrowings and had no outstanding balance and available borrowings of $399,451 under the Domestic Credit Facility. China Credit Facility In August 2013, Deckers (Beijing) Trading Co., LTD (DBTC), a wholly-owned subsidiary of the Company, entered into a revolving credit facility agreement in China (as amended, the China Credit Facility) that provided for an uncommitted revolving line of credit. In October 2016, the China Credit Facility was amended to include an increase in the uncommitted revolving line of credit of up to CNY 300,000, or $45,313, and to remove the sublimit of CNY 50,000, or $7,552, for the Company's wholly-owned subsidiary, Deckers Footwear (Shanghai) Co., LTD (DFSC). In March 2017, the China Credit Facility was amended to remove DFSC, leaving DBTC as the only remaining borrower, and to add an overdraft facility sublimit of CNY 100,000, or $15,104. The China Credit Facility is payable on demand and subject to annual review with a defined aggregate period of borrowing of up to 12 months. The obligations under the China Credit Facility are guaranteed by the Company for 108.5% of the facility amount in US dollars. Interest is based on 115.0% multiplied by the People’s Bank of China market rate, which was 4.35%. As of June 30, 2018, the effective interest rate was 5.00%. During the three months ended June 30, 2018, the Company made no borrowings or repayments under the China Credit Facility. As of June 30, 2018, the Company had no outstanding balance and available borrowings of $45,313 under the China Credit Facility. Subsequent to June 30, 2018 through August 3, 2018, the Company made no additional borrowings and had no outstanding balance and available borrowings of approximately $45,313 under the China Credit Facility. Japan Credit Facility In March 2016, Deckers Japan, G.K., a wholly-owned subsidiary of the Company, entered into a revolving credit facility agreement in Japan (as amended, the Japan Credit Facility) that provides for an uncommitted revolving line of credit of up to JPY 5,500,000, or $49,669, 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. The Company has renewed the Japan Credit Facility through January 31, 2019 under the terms of the original agreement. Interest is based on the Tokyo Interbank Offered Rate (TIBOR) for three months plus 0.40%. As of June 30, 2018, TIBOR for three months was 0.05% and the effective interest rate was 0.45%. During the three months ended June 30, 2018, the Company made no borrowings or repayments under the Japan Credit Facility. As of June 30, 2018, the Company had no outstanding balance under the Japan Credit Facility and available borrowings of $49,669. Subsequent to June 30, 2018 through August 3, 2018, the Company made no additional borrowings and had no outstanding balance and available borrowings of approximately $49,669 under the Japan Credit Facility. Mortgage In July 2014, the Company obtained a mortgage secured by the property on which its corporate headquarters is located for approximately $33,900. As of June 30, 2018, the outstanding principal balance under the mortgage was $31,943, which includes $585 in short-term borrowings and $31,358 in mortgage payable in the condensed consolidated balance sheets. 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 requires a balloon payment of approximately $23,700, in addition to any then-outstanding balance, on July 1, 2029. Debt Covenants As of June 30, 2018, the Company was in compliance with all debt covenants under the various revolving credit facilities and the mortgage, discussed above.

Revolving Credit Facilities and Mortgage Payable

Domestic Credit Facility

In November 2014, the Company amended its revolving credit facility agreement with JPMorgan Chase Bank, National Association, as the administrative agent, Comerica and HSBC as co-syndication agents, and the lenders party thereto (as amended, Second Amended and Restated Credit Agreement). The Second Amended and Restated Credit Agreement provides for a five-year, $400,000 secured revolving credit facility (Domestic Credit Facility) which contains a $75,000 sublimit for the issuance of letters of credit and a $5,000 sublimit for swing line loans, and which matures on November 13, 2019.

At the Company's election, interest under the Domestic Credit Facility is tied to the adjusted London Interbank Offered Rate (LIBOR) or the Alternative Base Rate (ABR), and is variable based on the Company's total adjusted leverage ratio. As of June 30, 2018, the adjusted LIBOR and ABR rates were 3.34% and 5.25%, respectively.

During the three months ended June 30, 2018, the Company made no borrowings or repayments under the Domestic Credit Facility. As of June 30, 2018, the Company had no outstanding balance under the Domestic Credit Facility. As a result, the available borrowings under the Domestic Credit Facility as of June 30, 2018 were $399,451, including outstanding letters of credit of $549. Any amounts outstanding are recorded in short-term borrowings in the condensed consolidated balance sheets. Subsequent to June 30, 2018 through August 3, 2018, the Company made no additional borrowings and had no outstanding balance and available borrowings of $399,451 under the Domestic Credit Facility.

China Credit Facility

In August 2013, Deckers (Beijing) Trading Co., LTD (DBTC), a wholly-owned subsidiary of the Company, entered into a revolving credit facility agreement in China (as amended, the China Credit Facility) that provided for an uncommitted revolving line of credit. In October 2016, the China Credit Facility was amended to include an increase in the uncommitted revolving line of credit of up to CNY 300,000, or $45,313, and to remove the sublimit of CNY 50,000, or $7,552, for the Company's wholly-owned subsidiary, Deckers Footwear (Shanghai) Co., LTD (DFSC). In March 2017, the China Credit Facility was amended to remove DFSC, leaving DBTC as the only remaining borrower, and to add an overdraft facility sublimit of CNY 100,000, or $15,104.

The China Credit Facility is payable on demand and subject to annual review with a defined aggregate period of borrowing of up to 12 months. The obligations under the China Credit Facility are guaranteed by the Company for 108.5% of the facility amount in US dollars. Interest is based on 115.0% multiplied by the People’s Bank of China market rate, which was 4.35%. As of June 30, 2018, the effective interest rate was 5.00%.

During the three months ended June 30, 2018, the Company made no borrowings or repayments under the China Credit Facility. As of June 30, 2018, the Company had no outstanding balance and available borrowings of $45,313 under the China Credit Facility. Subsequent to June 30, 2018 through August 3, 2018, the Company made no additional borrowings and had no outstanding balance and available borrowings of approximately $45,313 under the China Credit Facility.

Japan Credit Facility

In March 2016, Deckers Japan, G.K., a wholly-owned subsidiary of the Company, entered into a revolving credit facility agreement in Japan (as amended, the Japan Credit Facility) that provides for an uncommitted revolving line of credit of up to JPY 5,500,000, or $49,669, 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. The Company has renewed the Japan Credit Facility through January 31, 2019 under the terms of the original agreement. Interest is based on the Tokyo Interbank Offered Rate (TIBOR) for three months plus 0.40%. As of June 30, 2018, TIBOR for three months was 0.05% and the effective interest rate was 0.45%.

During the three months ended June 30, 2018, the Company made no borrowings or repayments under the Japan Credit Facility. As of June 30, 2018, the Company had no outstanding balance under the Japan Credit Facility and available borrowings of $49,669. Subsequent to June 30, 2018 through August 3, 2018, the Company made no additional borrowings and had no outstanding balance and available borrowings of approximately $49,669 under the Japan Credit Facility.

Mortgage

In July 2014, the Company obtained a mortgage secured by the property on which its corporate headquarters is located for approximately $33,900. As of June 30, 2018, the outstanding principal balance under the mortgage was $31,943, which includes $585 in short-term borrowings and $31,358 in mortgage payable in the condensed consolidated balance sheets. 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 requires a balloon payment of approximately $23,700, in addition to any then-outstanding balance, on July 1, 2029.

Debt Covenants

As of June 30, 2018, the Company was in compliance with all debt covenants under the various revolving credit facilities and the mortgage, discussed above.