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Investment Securities - Securities available-for-sale (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Debt Securities, Available-for-Sale [Line Items] |  |
Amortized Cost | $ 536,334 | $ 669,646
Gross Unrealized Gains | 37 | 13
Gross Unrealized Losses | (59,258) | (72,463)
Estimated Fair Value | 477,113 | 597,196
Allowance for Credit Losses | 0 | 0
U.S. Treasury securities |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Amortized Cost | 9,994 | 9,990
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (936) | (1,036)
Estimated Fair Value | 9,058 | 8,954
Allowance for Credit Losses | 0 | 0
U.S. Government agencies |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Amortized Cost | 70 | 102
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (5) | (7)
Estimated Fair Value | 65 | 95
Allowance for Credit Losses | 0 | 0
Obligations of states and political subdivisions |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Amortized Cost | 183,766 | 198,070
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (19,126) | (17,848)
Estimated Fair Value | 164,640 | 180,222
Allowance for Credit Losses | 0 | 0
U.S. Government sponsored entities and agencies collateralized by residential mortgage obligations |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Amortized Cost | 76,732 | 88,874
Gross Unrealized Gains | 8 | 3
Gross Unrealized Losses | (4,438) | (5,525)
Estimated Fair Value | 72,302 | 83,352
Allowance for Credit Losses | 0 | 0
Private label residential mortgage and asset backed securities |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Amortized Cost | 265,302 | 372,610
Gross Unrealized Gains | 6 | 10
Gross Unrealized Losses | (34,753) | (48,047)
Estimated Fair Value | 230,555 | 324,573
Allowance for Credit Losses | 0 | $ 0
Corporate debt securities |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Amortized Cost | 470 |
Gross Unrealized Gains | 23 |
Gross Unrealized Losses | 0 |
Estimated Fair Value | 493 |
Allowance for Credit Losses | $ 0 |

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