Restructuring (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended		23 Months Ended
	Dec. 31, 2017 USD ($) store	Dec. 31, 2016 USD ($)	Dec. 31, 2017 USD ($) store	Dec. 31, 2016 USD ($)	Mar. 31, 2017 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2017 USD ($) store
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 1,667	$ 7,577
Fiscal Year 2016 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Cost incurred to date	$ 55,324		55,324				$ 55,324
Restructuring charges	149	$ 4,945	1,667	7,577	$ 28,984	$ 24,673	55,324
Restructuring reserve	$ 5,077		$ 5,077		$ 11,080		$ 5,077
Fiscal Year 2016 Restructuring Plan | Facility Closing
Restructuring Cost and Reserve [Line Items]
Number of stores closed | store	27		27				27
Short Term Liabilities | Fiscal Year 2016 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	$ 1,428		$ 1,428				$ 1,428
Long Term Liabilities | Fiscal Year 2016 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	3,649		3,649				3,649
Selling, General and Administrative Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges	149		1,667
Reportable segments | Direct-to-Consumer | Fiscal Year 2016 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges	149	3,233	149	4,628			23,454
Reportable segments | Sanuk brand wholesale | Fiscal Year 2016 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0	0	0	0			3,068
Reportable segments | UGG brand wholesale | Fiscal Year 2016 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0	0	0	574			2,238
Reportable segments | Other brands wholesale | Fiscal Year 2016 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0	0	0	0			2,263
Unallocated overhead costs | Fiscal Year 2016 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 0	$ 1,712	$ 1,518	$ 2,375			$ 24,301