Related Party Transactions (Related Party Costs and Expenses) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Related party cost and expense:
Costs and Expenses, Related Party	$ 20,400	$ 20,600	$ 69,700	$ 73,100
Blackwater [Member]
Related party cost and expense:
Costs and Expenses, Related Party	20,427	20,620	69,690	73,095
Lease expenses | Blackwater [Member]
Related party cost and expense:
Costs and Expenses, Related Party	604	604	1,812	1,812
Printing expenses | Blackwater [Member]
Related party cost and expense:
Costs and Expenses, Related Party	877	0	2,194	0
Commission expenses | Blackwater [Member]
Related party cost and expense:
Costs and Expenses, Related Party	$ 18,946	$ 20,016	$ 65,684	$ 71,283