Restructuring - Schedule of Restructuring by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended		23 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 1,667	$ 7,577
Fiscal Year 2016 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 149	$ 4,945	1,667	7,577	$ 28,984	$ 24,673	$ 55,324
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 | Sanuk brand wholesale | Fiscal Year 2016 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0	0	0	0			3,068
Reportable segments | Other brands wholesale | Fiscal Year 2016 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0	0	0	0			2,263
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
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