Leases (Maturities of lease liabilities) (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Mar. 31, 2023
Finance Lease Liabilities Payments Due [Abstract]
2023	$ 75,174
2024	77,194
2025	46,457
2026	0
2027	0
Thereafter	0
Total lease payments	198,825
Less: imputed interest	(9,788)
Present value of finance lease liabilities	189,037
Operating Lease Liabilities Payments Due [Abstract]
2023	18,686
2024	12,244
2025	5,534
2026	4,087
2027	3,483
Thereafter	62,497
Total lease payments	106,531
Less: inputed interest	(47,723)
Present value of operating lease liabilities	$ 58,808	$ 58,373