Balance Sheet Components - Components of Certain Balance Sheet Liability Amounts (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Mar. 31, 2020
Accrued and other current liabilities:
Accrued personnel expenses	$ 105,159	$ 104,423
Accrued sales return liability	28,990	30,267
Accrued customer marketing, pricing and incentive programs	143,597	130,220
Operating lease liability	12,868	10,945
Accrued freight and duty	27,954	13,284
Warranty accrual	27,303	25,905
Income taxes payable	40,884	8,823
Contingent consideration	29,000	23,284
Other current liabilities	126,222	107,873
Accrued and other current liabilities	$ 541,977	455,024
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccruedLiabilitiesCurrent
Other non-current liabilities:
Warranty accrual	$ 14,479	14,134
Obligation for deferred compensation plan	24,559	20,085
Employee benefit plan obligations	63,837	61,303
Operating lease liability	23,017	19,536
Deferred tax liability	1,931	1,931
Other non-current liabilities	2,726	2,285
Non-current liabilities	$ 130,549	$ 119,274
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesNoncurrent