Revenue Recognition and Contracts with Customers - Summary of Contract Assets and Liabilities Balances (Details) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2020	Mar. 31, 2020
Revenue From Contract With Customer [Abstract]
Contract assets	$ 209,424	$ 267,079
Contract liabilities	(301,190)	(386,585)
Net contract liability	(91,766)	$ (119,506)
Change in contract assets	(57,655)
Change in contract liabilities	85,395
Change in net contract liability	$ 27,740