REPORTABLE OPERATING SEGMENTS - Schedule of Operating Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Segment Reporting Information [Line Items]
Net sales	$ 1,430,840	$ 1,311,320	$ 2,395,378	$ 2,136,667
Cost of sales	627,018	578,048	1,053,650	933,395
Gross profit	$ 803,822	$ 733,272	$ 1,341,728	$ 1,203,272
Segment gross margin	56.20%	55.90%	56.00%	56.30%
Less:
Payroll and related costs	$ 75,775	$ 65,199	$ 141,680	$ 118,542
Advertising, marketing, and promotion expenses	132,195	121,061	213,959	189,547
Rent and occupancy	28,900	23,307	55,201	44,449
Depreciation and other related costs	4,733	7,737	9,202	11,504
Other segment items	65,946	48,226	110,149	81,998
Segment SG&A expenses	307,549	265,530	530,191	446,040
Segment income from operations	$ 496,273	$ 467,742	$ 811,537	$ 757,232
Segment operating margin	34.70%	35.70%	33.90%	35.40%
HOKA | Reportable segments
Segment Reporting Information [Line Items]
Net sales	$ 634,086	$ 570,896	$ 1,287,205	$ 1,116,074
Cost of sales	269,332	237,135	545,504	458,648
Gross profit	$ 364,754	$ 333,761	$ 741,701	$ 657,426
Segment gross margin	57.50%	58.50%	57.60%	58.90%
Less:
Payroll and related costs	$ 32,436	$ 25,356	$ 60,944	$ 46,085
Advertising, marketing, and promotion expenses	71,581	66,576	127,569	111,879
Rent and occupancy	10,433	6,750	19,479	12,517
Depreciation and other related costs	1,610	1,352	3,083	2,407
Other segment items	27,397	19,166	55,801	39,059
Segment SG&A expenses	143,457	119,200	266,876	211,947
Segment income from operations	$ 221,297	$ 214,561	$ 474,825	$ 445,479
Segment operating margin	34.90%	37.60%	36.90%	39.90%
UGG | Reportable segments
Segment Reporting Information [Line Items]
Net sales	$ 759,587	$ 689,865	$ 1,024,679	$ 912,816
Cost of sales	338,048	311,305	463,816	414,997
Gross profit	$ 421,539	$ 378,560	$ 560,863	$ 497,819
Segment gross margin	55.50%	54.90%	54.70%	54.50%
Less:
Payroll and related costs	$ 38,886	$ 35,103	$ 71,751	$ 63,523
Advertising, marketing, and promotion expenses	55,704	47,592	75,272	63,452
Rent and occupancy	18,449	16,474	35,666	31,660
Depreciation and other related costs	3,117	2,484	6,074	4,888
Other segment items	33,110	24,560	45,844	36,063
Segment SG&A expenses	149,266	126,213	234,607	199,586
Segment income from operations	$ 272,273	$ 252,347	$ 326,256	$ 298,233
Segment operating margin	35.80%	36.60%	31.80%	32.70%
Other Brands | Reportable segments
Segment Reporting Information [Line Items]
Net sales	$ 37,167	$ 50,559	$ 83,494	$ 107,777
Cost of sales	19,638	29,608	44,330	59,750
Gross profit	$ 17,529	$ 20,951	$ 39,164	$ 48,027
Segment gross margin	47.20%	41.40%	46.90%	44.60%
Less:
Payroll and related costs	$ 4,453	$ 4,740	$ 8,985	$ 8,934
Advertising, marketing, and promotion expenses	4,910	6,893	11,118	14,216
Rent and occupancy	18	83	56	272
Depreciation and other related costs	6	3,901	45	4,209
Other segment items	5,439	4,500	8,504	6,876
Segment SG&A expenses	14,826	20,117	28,708	34,507
Segment income from operations	$ 2,703	$ 834	$ 10,456	$ 13,520
Segment operating margin	7.30%	1.60%	12.50%	12.50%