Reportable Operating Segments (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) segment	Sep. 30, 2022 USD ($)	Mar. 31, 2023 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment			6
Net sales	$ 1,091,907	$ 875,614	$ 1,767,698	$ 1,490,075
Income (loss) from operations	224,617	127,831	295,353	184,172
Assets	2,848,533		2,848,533		$ 2,556,203
Unallocated cash and cash equivalents	823,051		823,051		981,795
Unallocated deferred tax assets, net	71,078		71,078		72,592
Reportable segments
Segment Reporting Information [Line Items]
Assets	1,492,026		1,492,026		1,087,915
Reportable segments | UGG brand wholesale
Segment Reporting Information [Line Items]
Assets	740,892		740,892		261,683
Reportable segments | HOKA brand wholesale
Segment Reporting Information [Line Items]
Assets	361,699		361,699		446,450
Reportable segments | Teva brand wholesale
Segment Reporting Information [Line Items]
Assets	48,519		48,519		94,735
Reportable segments | Sanuk brand wholesale
Segment Reporting Information [Line Items]
Assets	30,971		30,971		41,405
Reportable segments | Other brands wholesale
Segment Reporting Information [Line Items]
Assets	51,734		51,734		24,448
Reportable segments | Direct-to-Consumer
Segment Reporting Information [Line Items]
Assets	258,211		258,211		219,194
Segment reconciling items
Segment Reporting Information [Line Items]
Income (loss) from operations	(140,922)	(116,688)	(256,993)	(216,338)
Unallocated cash and cash equivalents	823,051		823,051		981,795
Unallocated deferred tax assets, net	71,078		71,078		72,592
Corporate
Segment Reporting Information [Line Items]
Unallocated other corporate assets	462,378		462,378		$ 413,901
Wholesale | UGG brand wholesale
Segment Reporting Information [Line Items]
Net sales	451,841	361,305	573,386	499,167
Wholesale | HOKA brand wholesale
Segment Reporting Information [Line Items]
Net sales	262,973	223,035	523,820	454,920
Wholesale | Teva brand wholesale
Segment Reporting Information [Line Items]
Net sales	12,150	19,587	47,282	66,482
Wholesale | Sanuk brand wholesale
Segment Reporting Information [Line Items]
Net sales	3,348	5,060	9,818	15,786
Wholesale | Other brands wholesale
Segment Reporting Information [Line Items]
Net sales	29,862	27,559	31,289	29,552
Wholesale | Reportable segments | UGG brand wholesale
Segment Reporting Information [Line Items]
Income (loss) from operations	165,902	112,083	182,768	142,748
Wholesale | Reportable segments | HOKA brand wholesale
Segment Reporting Information [Line Items]
Income (loss) from operations	81,873	63,576	168,397	133,192
Wholesale | Reportable segments | Teva brand wholesale
Segment Reporting Information [Line Items]
Income (loss) from operations	(647)	2,737	8,590	15,230
Wholesale | Reportable segments | Sanuk brand wholesale
Segment Reporting Information [Line Items]
Income (loss) from operations	(303)	350	456	2,816
Wholesale | Reportable segments | Other brands wholesale
Segment Reporting Information [Line Items]
Income (loss) from operations	6,459	5,837	4,418	5,368
Direct-to-Consumer | Direct-to-Consumer
Segment Reporting Information [Line Items]
Net sales	331,733	239,068	582,103	424,168
Direct-to-Consumer | Reportable segments | Direct-to-Consumer
Segment Reporting Information [Line Items]
Income (loss) from operations	$ 112,255	$ 59,936	$ 187,717	$ 101,156