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Available-For-Sale Securities (Details) $ in Millions | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2024 USD ($) | Dec. 31, 2023 USD ($)
Available-for-Sale Securities [Line Items] |  |
Fair value of securities pledged as collateral | $ 145.4 | $ 89.7
Securities delivered for repurchase agreements | 18.4 | 19.7
Total fair value of investments | $ 207.5 | $ 217.0
Number of securities | 138 | 139
Fair value of debt securities, percentage | 99.00% |
Available-for-sale investment portfolio percentage |  | 99.00%
Available-for-sale debt securities | $ 0.7 |

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