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Statutory Financial Information of Insurance Subsidiaries (Narratives) (Details) - Operating Segments [Member] - USD ($) $ in Millions	Mar. 31, 2025	Mar. 31, 2024
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

Statutory Financial Information Of Insurance Subsidiaries Abstract

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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

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- Definition

Amount of dividends available for payment after computation of statutory restrictions on capital surplus.

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