General - Narrative (Details) $ in Thousands	12 Months Ended
	Mar. 31, 2026 USD ($) tannery segment proprietary_brand	Mar. 31, 2025 USD ($)	Mar. 31, 2024 USD ($)
Restructuring Cost and Reserve [Line Items]
Number of proprietary brands | proprietary_brand	3
Number of reportable segments | segment	3
Number of operating segments | segment	3
Number of tanneries | tannery	2
Depreciation	$ 74,590	$ 67,579	$ 54,958
Goodwill (Note 1)	13,990	13,990
Impairment of goodwill and indefinite lived intangible assets	0	0	0
Accumulated impairment losses	(15,831)	(15,831)
Impairment of intangible assets	0	0	8,164
Other long-lived asset impairment	$ 0	4,290
Effective period (in years)	1 year
Distribution costs	$ 266,237	279,090	238,312
Research and development costs	68,899	56,676	49,171
Advertising, marketing, and promotion expenses	495,838	432,198	348,852
Prepaid advertising, marketing, and promotion expense	$ 3,519	4,045
Employer matching contribution percentage (in percentage)	50.00%
Employer matching contribution, percent of employees' gross pay (in percentage)	6.00%
Defined contribution plan cost	$ 6,824	6,528	5,129
Profit-sharing contributions	$ 0	0	0
Deferral percentage of annual base salary, maximum (in percentage)	50.00%
Deferral percentage of cash incentive bonus, maximum (in percentage)	95.00%
China and Other
Restructuring Cost and Reserve [Line Items]
Change in production of goods rate (in percentage)	0.05
Trademarks
Restructuring Cost and Reserve [Line Items]
Intangible assets	$ 15,454	15,454
HOKA
Restructuring Cost and Reserve [Line Items]
Goodwill (Note 1)	7,889	7,889
UGG
Restructuring Cost and Reserve [Line Items]
Goodwill (Note 1)	$ 6,101	$ 6,101
UGG and HOKA Brands
Restructuring Cost and Reserve [Line Items]
Other long-lived asset impairment			$ 1,015
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)	18 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