Related Party Transactions (Related Party Revenue) (Details) - USD ($) $ in Thousands	12 Months Ended
Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2021
Related party transactions:
Management fees revenue	$ 37,073	$ 35,194	$ 31,603
Blackwater [Member]
Related party transactions:
Management fees revenue	29,825	28,546	25,512
Mercury [Member]
Related party transactions:
Management fees revenue	$ 7,248	$ 6,648	$ 6,091

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

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+ Details