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Investment Securities - Narrative (Details) $ in Thousands | Sep. 30, 2023 USD ($) security | Dec. 31, 2022 USD ($) security
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Investments, Debt and Equity Securities [Abstract] |  |
Debt securities with carrying values, pledged | $ 117,400 | $ 111,600
Accrued interest on investments | $ 1,300 | $ 1,500
Number of securities consisted in portfolio | security | 435 | 439
Number of securities in loss position | security | 434 | 436
Aggregate fair value of securities in loss position | $ 233,181 | $ 249,619
Loss position for 12 months or longer | 219,542 | 119,799
Aggregate unrealized loss | $ 56,463 | $ 46,409

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