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Related Party Transactions (Related Party Costs and Expenses) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2022 | Dec. 31, 2021
Related party cost and expense: |  |  |  |
Related party expenses, total | $ 20,620 | $ 21,690 | $ 73,095 | $ 72,343
Blackwater [Member] |  |  |  |
Related party cost and expense: |  |  |  |
U-Haul lease expenses | 604 | 604 | 1,812 | 1,841
U-Haul commission expenses | $ 20,016 | $ 21,086 | $ 71,283 | $ 70,502

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- Definition Costs of sales and operating expenses for the period incurred from transactions with related parties. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2) -URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227 + Details
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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 https://asc.fasb.org/extlink&oid=123406913&loc=d3e41499-112717 + Details
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