REPORTABLE OPERATING SEGMENTS (Details) $ in Thousands	2 Months Ended	3 Months Ended		6 Months Ended
	Sep. 30, 2024 USD ($) segment	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Mar. 31, 2024 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment	5
Net sales		$ 1,311,320	$ 1,091,907	$ 2,136,667	$ 1,767,698
Income (loss) from operations		305,086	224,617	437,893	295,353
Assets	$ 3,398,136	3,398,136		3,398,136		$ 3,135,579
Unallocated cash and cash equivalents	1,225,681	1,225,681		1,225,681		1,502,051
Unallocated deferred tax assets, net	73,322	73,322		73,322		72,584
Reportable segments
Segment Reporting Information [Line Items]
Assets	1,619,253	1,619,253		1,619,253		1,056,731
Reportable segments | UGG brand
Segment Reporting Information [Line Items]
Net sales		512,401	451,841	654,954	573,386
Income (loss) from operations		195,494	165,902	233,924	182,768
Assets	803,422	803,422		803,422		247,136
Reportable segments | Hoka brand
Segment Reporting Information [Line Items]
Net sales		362,344	262,973	695,076	523,820
Income (loss) from operations		115,941	81,873	240,635	168,397
Assets	448,495	448,495		448,495		436,147
Reportable segments | Teva brand
Segment Reporting Information [Line Items]
Net sales		12,132	12,150	43,491	47,282
Income (loss) from operations		(1,216)	(647)	5,573	8,590
Assets	39,776	39,776		39,776		81,703
Reportable segments | Sanuk brand
Segment Reporting Information [Line Items]
Net sales		1,895	3,348	6,328	9,818
Income (loss) from operations		(3,258)	(303)	(1,655)	456
Assets	929	929		929		18,526
Reportable segments | Other brands
Segment Reporting Information [Line Items]
Net sales		24,881	29,862	28,586	31,289
Income (loss) from operations		2,023	6,459	466	4,418
Assets	41,390	41,390		41,390		9,379
Reportable segments | Direct-to-Consumer
Segment Reporting Information [Line Items]
Net sales		397,667	331,733	708,232	582,103
Income (loss) from operations		143,447	112,255	249,857	187,717
Assets	285,241	285,241		285,241		263,840
Unallocated
Segment Reporting Information [Line Items]
Income (loss) from operations		(147,345)	$ (140,922)	(290,907)	$ (256,993)
Unallocated cash and cash equivalents	1,225,681	1,225,681		1,225,681		1,502,051
Unallocated deferred tax assets, net	73,322	73,322		73,322		72,584
Corporate
Segment Reporting Information [Line Items]
Unallocated other corporate assets	$ 479,880	$ 479,880		$ 479,880		$ 504,213