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Related Party Transactions (Related Party Assets) (Details) - USD ($) $ in Thousands | Jun. 30, 2022 | Mar. 31, 2022
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Related party assets: |  |
Amounts due to related parties | $ (973) | $ 779
Related party assets | 45,190 | 47,851
Blackwater [Member] |  |
Related party assets: |  |
Notes receivable | 38,624 | 41,364
Mercury [Member] |  |
Related party assets: |  |
Notes receivable | $ 7,539 | $ 5,708

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