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Statutory Financial Information of Insurance Subsidiaries (Narratives) (Details) - Operating Segments [Member] - USD ($) $ in Millions | Mar. 31, 2025 | Mar. 31, 2024
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Repwest [Member] |  |
Statutory financial information of insurance subsidiaries: |  |
Statutory accounting practices, statutory amount available for dividend payments | $ 38.3 |
Property and Casualty Insurance [Member] |  |
Statutory financial information of insurance subsidiaries: |  |
Restricted net assets, subsidiaries | $ 230.1 | $ 101.2

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- Definition Amount of restricted net assets of consolidated and unconsolidated subsidiaries as of the end of the most recently completed fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(e)(3)(ii)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1 + Details
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