Reportable Operating Segments (Details) $ in Thousands	3 Months Ended
	Jun. 30, 2021 USD ($) segment	Jun. 30, 2020 USD ($)	Mar. 31, 2021 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment	6
Net sales	$ 504,678	$ 283,169
Income (loss) from operations	61,832	(7,699)
Total assets	2,291,255		$ 2,167,705
Unallocated cash and cash equivalents	956,712		1,089,361
Unallocated deferred tax assets, net	40,817		37,194
Reportable segments
Segment Reporting Information [Line Items]
Total assets	903,153		721,060
Reportable segments | UGG brand wholesale
Segment Reporting Information [Line Items]
Total assets	409,027		212,277
Reportable segments | HOKA brand wholesale
Segment Reporting Information [Line Items]
Total assets	176,098		168,365
Reportable segments | Teva brand wholesale
Segment Reporting Information [Line Items]
Total assets	62,270		87,284
Reportable segments | Sanuk brand wholesale
Segment Reporting Information [Line Items]
Total assets	37,117		38,311
Reportable segments | Other brands wholesale
Segment Reporting Information [Line Items]
Total assets	25,810		18,732
Reportable segments | Direct-to-Consumer
Segment Reporting Information [Line Items]
Total assets	192,831		196,091
Segment reconciling items
Segment Reporting Information [Line Items]
Income (loss) from operations	(80,666)	(55,646)
Unallocated cash and cash equivalents	956,712		1,089,361
Unallocated deferred tax assets, net	40,817		37,194
Corporate
Segment Reporting Information [Line Items]
Unallocated other corporate assets	390,573		$ 320,090
Wholesale | UGG brand wholesale
Segment Reporting Information [Line Items]
Net sales	135,056	43,428
Wholesale | HOKA brand wholesale
Segment Reporting Information [Line Items]
Net sales	151,147	70,619
Wholesale | Teva brand wholesale
Segment Reporting Information [Line Items]
Net sales	43,359	21,411
Wholesale | Sanuk brand wholesale
Segment Reporting Information [Line Items]
Net sales	10,382	7,228
Wholesale | Other brands wholesale
Segment Reporting Information [Line Items]
Net sales	4,306	635
Wholesale | Reportable segments | UGG brand wholesale
Segment Reporting Information [Line Items]
Income (loss) from operations	35,838	(3,735)
Wholesale | Reportable segments | HOKA brand wholesale
Segment Reporting Information [Line Items]
Income (loss) from operations	46,363	17,235
Wholesale | Reportable segments | Teva brand wholesale
Segment Reporting Information [Line Items]
Income (loss) from operations	14,503	4,202
Wholesale | Reportable segments | Sanuk brand wholesale
Segment Reporting Information [Line Items]
Income (loss) from operations	3,404	488
Wholesale | Reportable segments | Other brands wholesale
Segment Reporting Information [Line Items]
Income (loss) from operations	2,707	(1,270)
Direct-to-Consumer | Direct-to-Consumer
Segment Reporting Information [Line Items]
Net sales	160,428	139,848
Direct-to-Consumer | Reportable segments | Direct-to-Consumer
Segment Reporting Information [Line Items]
Income (loss) from operations	$ 39,683	$ 31,027