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Related Party Transactions (Related Party Costs and Expenses) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2021 | Dec. 31, 2020
Related party cost and expense: |  |  |  |
Related party expenses, total | $ 21,690 | $ 18,757 | $ 72,343 | $ 55,937
Blackwater [Member] |  |  |  |
Related party cost and expense: |  |  |  |
U-Haul lease expenses | 604 | 658 | 1,841 | 1,973
U-Haul commission expenses | $ 21,086 | $ 18,099 | $ 70,502 | $ 53,964

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- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=123406913&loc=d3e41499-112717 + Details
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