Revenue Recognition - Schedule of Contract Assets and Contract Liabilities (Details) - USD ($) $ in Thousands	9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Contract Asset
Balance, March 31, 2019	$ 10,441	$ 11,251
Net additions to sales return allowance	28,186	29,653
Actual returns	(25,415)	(24,549)
Balance, December 31, 2019	13,212	16,355
Contract Liability
Balance, March 31, 2019	(24,787)	(23,156)
Net additions to sales return allowance	(92,694)	(104,009)
Actual returns	78,437	82,828
Balance, December 31, 2019	$ (39,044)	$ (44,337)