Schedule II Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Sales Return Reserve
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	$ 4,759	$ 5,520	$ 7,213
Additions	7,094	4,969	3,964
Deductions	(7,662)	(5,730)	(5,657)
Balance at End of Year	4,191	4,759	5,520
Allowance for Doubtful Accounts
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	6,054	3,876	2,757
Additions	3,367	5,644	5,913
Deductions	(5,872)	(3,466)	(4,794)
Balance at End of Year	3,549	6,054	3,876
Valuation Allowance for Deferred Taxes
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	3,563	2,893	2,073
Additions	327	708	0
Acquisition Related Additions	1,590	0	922
Deductions	(28)	(38)	(102)
Balance at End of Year	$ 5,452	$ 3,563	$ 2,893