Revenue Recognition (Revenue disaggregated by timing of revenue recognition) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Disaggregation of Revenue [Abstract]
Revenues recognized under ASC 606	$ 714,402	$ 746,406	$ 699,386
Revenues [Abstract]
Total revenues	5,625,674	5,864,691	5,739,747
Revenues recognized under ASC 842
Revenues [Abstract]
Total revenues	4,575,486	4,744,746	4,690,434
Revenues recognized under ASC 944
Revenues [Abstract]
Total revenues	189,318	196,860	201,666
Revenues recognized under ASC 320
Revenues [Abstract]
Total revenues	146,468	176,679	148,261
Revenues recognized over time
Disaggregation of Revenue [Abstract]
Revenues recognized under ASC 606	312,659	320,822	284,401
Revenues recognized at a point in time
Disaggregation of Revenue [Abstract]
Revenues recognized under ASC 606	$ 401,743	$ 425,584	$ 414,985