Revenue Recognition and Contracts with Customers - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Mar. 31, 2019
Contract With Customer Asset And Liability [Line Items]
Change in contract assets			$ 57,655
Contract with customer, contract assets classified as held for sale	$ 38,355		38,355
Contract with customer, contract liability classified as held for sale	17,939		17,939
Contract with Customer, Liability, Revenue Recognized			70,709
Contract with Customer, Asset, Net, Noncurrent	16,368		16,368		$ 22,662
Contract with Customer, Liability, Noncurrent	126,031		126,031		$ 91,265
Gulfstream G650 [Member]
Contract With Customer Asset And Liability [Line Items]
Change in contract assets			60,802
Revenue Benchmark [Member]
Contract With Customer Asset And Liability [Line Items]
Revenue recognized due to changes in estimates associated with performance obligations	$ 1,299	$ 3,189	$ 3,253	$ 1,245