Related Party Transactions (Related Party Costs and Expenses) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021
Related party cost and expense:
Related party expenses, total	$ 20,620	$ 21,690	$ 73,095	$ 72,343
Blackwater [Member]
Related party cost and expense:
U-Haul lease expenses	604	604	1,812	1,841
U-Haul commission expenses	$ 20,016	$ 21,086	$ 71,283	$ 70,502