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Related Party Transactions (Related Party Assets) (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Mar. 31, 2021
--- | --- | ---
Related party assets: |  |
Related party assets | $ 56,231 | $ 35,395
Blackwater [Member] |  |
Related party assets: |  |
Notes receivable | 45,804 | 27,116
Mercury [Member] |  |
Related party assets: |  |
Notes receivable | 9,845 | 9,632
Insurance Group [Member] |  |
Related party assets: |  |
Amount due to related parties | $ 582 | $ (1,353)

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