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Investments - Securities on Deposit (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Investments |  |
Fair Value | $ 515,064 | $ 432,682
Securities on deposit with state regulatory authorities |  |
Investments |  |
Fair Value | $ 8,500 | $ 7,500

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