REPORTABLE OPERATING SEGMENTS - Schedule of Operating Segment Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting Information [Line Items]
Net sales	$ 4,985,612	$ 4,287,763	$ 3,627,286
Less: Cost of sales	2,099,949	1,902,275	1,801,916
Gross profit	$ 2,885,663	$ 2,385,488	$ 1,825,370
Segment gross margin	57.90%	55.60%	50.30%
Less:
Payroll and related costs	$ 265,328	$ 226,926	$ 182,288
Advertising, marketing, and promotion expenses	432,198	348,852	271,140
Rent and occupancy	102,615	92,661	78,788
Depreciation and other related costs	19,445	22,718	14,761
Other segment items	180,121	146,736	127,964
Segment SG&A expenses	999,707	837,893	674,941
Segment income from operations	$ 1,885,956	$ 1,547,595	$ 1,150,429
Segment operating margin	37.80%	36.10%	31.70%
Impairment of intangible assets	$ 0	$ 8,164	$ 0
UGG | Reportable segments
Segment Reporting Information [Line Items]
Net sales	2,531,351	2,239,132	1,929,211
Less: Cost of sales	1,023,495	983,636	975,585
Gross profit	$ 1,507,856	$ 1,255,496	$ 953,626
Segment gross margin	59.60%	56.10%	49.40%
Less:
Payroll and related costs	$ 146,093	$ 134,307	$ 109,576
Advertising, marketing, and promotion expenses	180,889	148,809	114,652
Rent and occupancy	75,724	75,724	69,302
Depreciation and other related costs	10,026	9,295	10,623
Other segment items	92,251	82,534	77,004
Segment SG&A expenses	504,983	450,669	381,157
Segment income from operations	$ 1,002,873	$ 804,827	$ 572,469
Segment operating margin	39.60%	35.90%	29.70%
HOKA | Reportable segments
Segment Reporting Information [Line Items]
Net sales	$ 2,233,090	$ 1,806,740	$ 1,412,916
Less: Cost of sales	949,824	763,673	641,240
Gross profit	$ 1,283,266	$ 1,043,067	$ 771,676
Segment gross margin	57.50%	57.70%	54.60%
Less:
Payroll and related costs	$ 101,056	$ 74,991	$ 57,446
Advertising, marketing, and promotion expenses	226,238	175,756	135,590
Rent and occupancy	26,467	16,589	9,033
Depreciation and other related costs	5,007	3,389	2,272
Other segment items	75,993	53,295	38,877
Segment SG&A expenses	434,761	324,020	243,218
Segment income from operations	$ 848,505	$ 719,047	$ 528,458
Segment operating margin	38.00%	39.80%	37.40%
Other Brands | Reportable segments
Segment Reporting Information [Line Items]
Net sales	$ 221,171	$ 241,891	$ 285,159
Less: Cost of sales	126,630	154,966	185,091
Gross profit	$ 94,541	$ 86,925	$ 100,068
Segment gross margin	42.70%	35.90%	35.10%
Less:
Payroll and related costs	$ 18,179	$ 17,628	$ 15,266
Advertising, marketing, and promotion expenses	25,071	24,287	20,898
Rent and occupancy	424	348	453
Depreciation and other related costs	4,412	10,034	1,866
Other segment items	11,877	10,907	12,083
Segment SG&A expenses	59,963	63,204	50,566
Segment income from operations	$ 34,578	$ 23,721	$ 49,502
Segment operating margin	15.60%	9.80%	17.40%