Related Party Transactions (Related Party Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended
Jun. 30, 2023	Jun. 30, 2022
Related party transactions:
Management fee revenue	$ 9,177	$ 9,139
Blackwater [Member]
Related party transactions:
Management fee revenue	7,696	7,729
Mercury [Member]
Related party transactions:
Management fee revenue	$ 1,481	$ 1,410

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