Reportable Operating Segments - Schedule of Operating Segment Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2024
Segment Reporting Information [Line Items]
Net sales	$ 5,472,296	$ 4,985,612	$ 4,287,763
Less: Cost of sales	2,314,570	2,099,949	1,902,275
Gross profit	$ 3,157,726	$ 2,885,663	$ 2,385,488
Segment gross margin	57.70%	57.90%	55.60%
Less:
Payroll and related costs	$ 307,073	$ 265,328	$ 226,926
Advertising, marketing, and promotion expenses	495,838	432,198	348,852
Rent and occupancy	130,571	102,615	92,661
Depreciation and other related costs	20,184	19,445	22,718
Other segment items	231,384	180,121	146,736
Segment SG&A expenses	1,185,050	999,707	837,893
Segment income from operations	$ 1,972,676	$ 1,885,956	$ 1,547,595
Segment operating margin	36.00%	37.80%	36.10%
Impairment of intangible assets	$ 0	$ 0	$ 8,164
UGG | Reportable segments
Segment Reporting Information [Line Items]
Net sales	2,738,758	2,531,351	2,239,132
Less: Cost of sales	1,115,588	1,023,495	983,636
Gross profit	$ 1,623,170	$ 1,507,856	$ 1,255,496
Segment gross margin	59.30%	59.60%	56.10%
Less:
Payroll and related costs	$ 158,290	$ 146,093	$ 134,307
Advertising, marketing, and promotion expenses	215,403	180,889	148,809
Rent and occupancy	84,287	75,724	75,724
Depreciation and other related costs	12,245	10,026	9,295
Other segment items	107,614	92,251	82,534
Segment SG&A expenses	577,839	504,983	450,669
Segment income from operations	$ 1,045,331	$ 1,002,873	$ 804,827
Segment operating margin	38.20%	39.60%	35.90%
HOKA | Reportable segments
Segment Reporting Information [Line Items]
Net sales	$ 2,587,330	$ 2,233,090	$ 1,806,740
Less: Cost of sales	1,116,395	949,824	763,673
Gross profit	$ 1,470,935	$ 1,283,266	$ 1,043,067
Segment gross margin	56.90%	57.50%	57.70%
Less:
Payroll and related costs	$ 130,466	$ 101,056	$ 74,991
Advertising, marketing, and promotion expenses	263,063	226,238	175,756
Rent and occupancy	46,173	26,467	16,589
Depreciation and other related costs	7,831	5,007	3,389
Other segment items	112,422	75,993	53,295
Segment SG&A expenses	559,955	434,761	324,020
Segment income from operations	$ 910,980	$ 848,505	$ 719,047
Segment operating margin	35.20%	38.00%	39.80%
Other Brands | Reportable segments
Segment Reporting Information [Line Items]
Net sales	$ 146,208	$ 221,171	$ 241,891
Less: Cost of sales	82,587	126,630	154,966
Gross profit	$ 63,621	$ 94,541	$ 86,925
Segment gross margin	43.50%	42.70%	35.90%
Less:
Payroll and related costs	$ 18,317	$ 18,179	$ 17,628
Advertising, marketing, and promotion expenses	17,372	25,071	24,287
Rent and occupancy	111	424	348
Depreciation and other related costs	108	4,412	10,034
Other segment items	11,348	11,877	10,907
Segment SG&A expenses	47,256	59,963	63,204
Segment income from operations	$ 16,365	$ 34,578	$ 23,721
Segment operating margin	11.20%	15.60%	9.80%