Revenue Recognition (Revenue disaggregated by timing of revenue recognition) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2021
Revenue From Contract With Customer [Abstract]
Revenues recognized over time	$ 320,822	$ 284,401	$ 182,278
Revenues recognized at point in time	425,584	414,985	396,600
Total revenues recognized under ASC 606	746,406	699,386	578,878
Revenues recognized under ASC 840	4,744,746	4,690,434	3,644,798
Revenues recognized under ASC 944	196,860	201,666	195,371
Revenues recognized under ASC 320	176,679	148,261	122,938
Total revenues	$ 5,864,691	$ 5,739,747	$ 4,541,985