Revenue Recognition - Schedule of Contract Assets and Contract Liabilities (Details) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Contract Asset
Beginning Balance	$ 9,663	$ 10,441
Net additions to sales return allowance	17,984	12,297
Actual returns	(16,386)	(14,763)
Ending Balance	11,261	7,975
Contract Liability
Beginning Balance	(25,667)	(24,787)
Net additions to sales return allowance	(59,811)	(37,604)
Actual returns	51,685	43,080
Ending Balance	$ (33,793)	$ (19,311)