Leases (Narratives) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Leases [Abstract]
Right Of Use Asset Obtained In Exchange For Operating Lease Liability	$ 117,600	$ 223,200
Cash paid for operating leases	33,800	32,100	$ 30,200
Cash paid for finance leases	105,564	124,188	166,262
Operating Lease Payments	$ 48,800	$ 9,500	$ 3,700