General - Schedule of Restructuring by Segment (Details) - USD ($) $ in Thousands	11 Months Ended	12 Months Ended				50 Months Ended
	Mar. 31, 2016	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2020
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 0	$ 295	$ 1,667
Fiscal Year 2016 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 24,673		295	1,667	$ 28,984	$ 55,619
Reportable segments | UGG brand wholesale | Fiscal Year 2016 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges			0	0		2,238
Reportable segments | Sanuk brand wholesale | Fiscal Year 2016 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges			0	0		3,068
Reportable segments | Other brands wholesale | Fiscal Year 2016 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges			0	0		2,263
Reportable segments | Direct-to-Consumer | Fiscal Year 2016 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges			0	149		23,454
Unallocated overhead costs | Fiscal Year 2016 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 295	$ 1,518		$ 24,596