Related Party Transactions (Related Party Costs and Expenses) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Related party cost and expense:
Costs and Expenses, Related Party	$ 26,500	$ 20,400	$ 89,953	$ 69,690
Blackwater [Member]
Related party cost and expense:
Costs and Expenses, Related Party	26,531	20,427
Lease expenses | Blackwater [Member]
Related party cost and expense:
Costs and Expenses, Related Party	604	604	1,812	1,812
Lease expenses | Mercury [Member]
Related party cost and expense:
Costs and Expenses, Related Party	38		114
Printing expenses | Blackwater [Member]
Related party cost and expense:
Costs and Expenses, Related Party	1,176	877	3,734	2,194
Commission expenses | Blackwater [Member]
Related party cost and expense:
Costs and Expenses, Related Party	19,409	$ 18,946	66,538	$ 65,684
Commission expenses | Mercury [Member]
Related party cost and expense:
Costs and Expenses, Related Party	$ 5,304		$ 17,755