Revenue Recognition (Revenue disaggregated by timing of revenue recognition) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Revenue From Contract With Customer [Abstract]
Revenues recognized over time	$ 284,401	$ 182,278	$ 147,565
Revenues recognized at point in time	414,985	396,600	309,804
Total revenues recognized under ASC 606	699,386	578,878	457,369
Revenues recognized under ASC 840	4,690,434	3,644,798	3,182,902
Revenues recognized under ASC 944	201,666	195,371	200,768
Revenues recognized under ASC 320	148,261	122,938	137,829
Total revenues	$ 5,739,747	$ 4,541,985	$ 3,978,868