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Investments - Schedule of Available for Sale Investment Purchases, Proceeds and Gains & Losses (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Investments, Debt and Equity Securities [Abstract] |  |  |  |
Purchases of AFS securities | $ 12,395 | $ 142,420 | $ 138,738 | $ 285,151
Proceeds from maturities, calls and prepayments of AFS securities | 13,689 | 16,616 | 51,328 | 51,245
Gross proceeds from sales of AFS securities | 0 | 29,713 | 16,970 | 62,902
Gross realized gains | 0 | 303 | 74 | 625
Gross realized (losses) | 0 | (7) | (184) | (9)
Total net realized gains (losses) from investment sales and redemptions | $ 0 | $ 296 | $ (110) | $ 616

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