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Investments - Fair Value of Investments on Deposit with Governmental Authorities - Narrative (Details) - USD ($) $ in Millions | Jun. 30, 2025 | Dec. 31, 2024
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Investments, Debt and Equity Securities [Abstract] |  |
Fair values of investments on deposit | $ 8.1 | $ 8.0

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- Definition Carrying amount of cash and investment securities on deposit with state regulatory authorities in connection with capital requirements. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 825 -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Publisher FASB -URI https://asc.fasb.org/1943274/2147477351/944-825-50-1A + Details
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