Reportable Operating Segments (Details)	3 Months Ended
	Jun. 30, 2020 USD ($) segment	Jun. 30, 2019 USD ($)	Mar. 31, 2020 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment	6
Net sales	$ 283,169,000	$ 276,839,000
(Loss) income from operations	(7,699,000)	(31,417,000)
Total assets	1,848,566,000		$ 1,765,118,000
Unallocated cash and cash equivalents	661,941,000		649,436,000
Unallocated deferred tax assets, net	28,243,000		28,233,000
Reportable segments
Segment Reporting Information [Line Items]
Total assets	838,652,000		775,840,000
Reportable segments | UGG brand wholesale
Segment Reporting Information [Line Items]
Total assets	328,583,000		245,239,000
Reportable segments | HOKA brand wholesale
Segment Reporting Information [Line Items]
Total assets	142,393,000		124,958,000
Reportable segments | Teva brand wholesale
Segment Reporting Information [Line Items]
Total assets	64,957,000		90,305,000
Reportable segments | Sanuk brand wholesale
Segment Reporting Information [Line Items]
Total assets	46,423,000		50,314,000
Reportable segments | Other brands wholesale
Segment Reporting Information [Line Items]
Total assets	24,145,000		21,535,000
Reportable segments | Direct-to-Consumer
Segment Reporting Information [Line Items]
Total assets	232,151,000		243,489,000
Segment reconciling items
Segment Reporting Information [Line Items]
Intersegment profit	0
(Loss) income from operations	(55,646,000)	(58,027,000)
Unallocated other corporate assets	319,730,000		$ 311,609,000
Wholesale | UGG brand wholesale
Segment Reporting Information [Line Items]
Net sales	43,428,000	85,400,000
Wholesale | HOKA brand wholesale
Segment Reporting Information [Line Items]
Net sales	70,619,000	64,006,000
Wholesale | Teva brand wholesale
Segment Reporting Information [Line Items]
Net sales	21,411,000	30,831,000
Wholesale | Sanuk brand wholesale
Segment Reporting Information [Line Items]
Net sales	7,228,000	14,607,000
Wholesale | Other brands wholesale
Segment Reporting Information [Line Items]
Net sales	635,000	1,727,000
Wholesale | Reportable segments | UGG brand wholesale
Segment Reporting Information [Line Items]
(Loss) income from operations	(3,735,000)	9,441,000
Wholesale | Reportable segments | HOKA brand wholesale
Segment Reporting Information [Line Items]
(Loss) income from operations	17,235,000	11,358,000
Wholesale | Reportable segments | Teva brand wholesale
Segment Reporting Information [Line Items]
(Loss) income from operations	4,202,000	8,316,000
Wholesale | Reportable segments | Sanuk brand wholesale
Segment Reporting Information [Line Items]
(Loss) income from operations	488,000	1,935,000
Wholesale | Reportable segments | Other brands wholesale
Segment Reporting Information [Line Items]
(Loss) income from operations	(1,270,000)	132,000
Directly to Consumer | Direct-to-Consumer
Segment Reporting Information [Line Items]
Net sales	139,848,000	80,268,000
Directly to Consumer | Reportable segments | Direct-to-Consumer
Segment Reporting Information [Line Items]
(Loss) income from operations	$ 31,027,000	$ (4,572,000)