GENERAL - Narrative (Details) $ in Thousands		12 Months Ended			24 Months Ended
	Sep. 13, 2024 shares	Mar. 31, 2025 USD ($) segment proprietary_brand shares	Mar. 31, 2024 USD ($) shares	Mar. 31, 2023 USD ($)	Dec. 31, 2024 segment	Sep. 12, 2024 shares
Restructuring Cost and Reserve [Line Items]
Number of proprietary brands | proprietary_brand		5
Number of reportable segments | segment		3			6
Stock split ratio	6
Common stock, authorized shares (in shares) | shares	750,000,000	750,000,000	750,000,000			125,000,000
Capital stock shares authorized (in shares) | shares	755,000,000					130,000,000
Preferred stock, authorized shares (in shares) | shares	5,000,000
Preferred stock, shares outstanding (in shares) | shares		0	0
Capitalized cloud computing arrangements, net		$ 6,031	$ 4,537
Depreciation		67,579	54,958	$ 45,117
Impairment of cloud computing arrangements, operating lease, and other long-lived assets		$ 4,290
Effective period (in years)		1 year
Distribution costs		$ 279,090	238,312	206,191
Research and development costs		56,676	49,171	38,657
Advertising, marketing, and promotion expenses		432,198	348,852	271,140
Prepaid advertising, marketing, and promotion expense		$ 4,045	1,130
Employer matching contribution percentage		50.00%
Employer matching contribution, percent of employees' gross pay		6.00%
Defined contribution plan cost		$ 6,528	5,129	4,433
Profit-sharing contributions		$ 0	0	0
Deferral percentage of annual base salary, maximum		50.00%
Deferral percentage of cash incentive bonus, maximum		85.00%
UGG and HOKA Brands
Restructuring Cost and Reserve [Line Items]
Impairment of cloud computing arrangements, operating lease, and other long-lived assets			1,015	$ 2,817
Minimum
Restructuring Cost and Reserve [Line Items]
Useful Life (Years)		1 year
Payment term (in days)		30 days
Minimum | Cloud Computing Arrangement
Restructuring Cost and Reserve [Line Items]
Hosting arrangement useful life (in years)		1 year
Maximum
Restructuring Cost and Reserve [Line Items]
Derivative term of contract (in months)		15 months
Payment term (in days)		60 days
Maximum | Cloud Computing Arrangement
Restructuring Cost and Reserve [Line Items]
Hosting arrangement useful life (in years)		3 years
Prepaid Expenses and Other Current Assets
Restructuring Cost and Reserve [Line Items]
Capitalized cloud computing arrangements, net		$ 2,167	1,534
Other Assets
Restructuring Cost and Reserve [Line Items]
Capitalized cloud computing arrangements, net		$ 3,864	$ 3,003