Related Party Transactions (Related Party Assets) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Mar. 31, 2021
Related party assets:
Related party assets	$ 38,773	$ 35,395
Blackwater [Member]
Related party assets:
Notes receivable	34,189	27,116
Mercury [Member]
Related party assets:
Notes receivable	4,610	9,632
Insurance Group [Member]
Related party assets:
Amounts due to related parties	$ (26)	$ (1,353)

For an unclassified balance sheet, amounts due from related parties including affiliates, employees, joint ventures, officers and stockholders, immediate families thereof, and pension funds.

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+ Details