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v3.25.3

Investments - Carrying value and estimated fair value (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Jun. 30, 2025 | Dec. 31, 2024 | Sep. 30, 2024 | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | --- | --- | --- | --- | ---
Available-for-Sale Securities |  |  |  |  |  |
Amortized Cost | $ 515,813 |  | $ 536,334 |  |  |
Gross Unrealized Gains | 185 |  | 37 |  |  |
Gross Unrealized Losses | (42,923) |  | (59,258) |  |  |
Estimated Fair Value | 473,075 |  | 477,113 |  |  |
Allowance for Credit Losses | 0 |  | 0 |  |  |
Held-to-Maturity Securities |  |  |  |  |  |
Amortized Cost | 287,806 |  | 302,515 |  |  |
Gross Unrealized Gains | 61 |  | 54 |  |  |
Gross Unrealized Losses | (21,161) |  | (28,001) |  |  |
Estimated Fair Value | 266,706 |  | 274,568 |  |  |
Allowance for Credit Losses | 724 | $ 786 | 1,156 | $ 857 | $ 1,076 | $ 1,051
U.S. Treasury securities |  |  |  |  |  |
Available-for-Sale Securities |  |  |  |  |  |
Amortized Cost | 9,995 |  | 9,994 |  |  |
Gross Unrealized Gains | 0 |  | 0 |  |  |
Gross Unrealized Losses | (556) |  | (936) |  |  |
Estimated Fair Value | 9,439 |  | 9,058 |  |  |
Allowance for Credit Losses | 0 |  | 0 |  |  |
U.S. Government agencies |  |  |  |  |  |
Available-for-Sale Securities |  |  |  |  |  |
Amortized Cost | 67 |  | 70 |  |  |
Gross Unrealized Gains | 0 |  | 0 |  |  |
Gross Unrealized Losses | (2) |  | (5) |  |  |
Estimated Fair Value | 65 |  | 65 |  |  |
Allowance for Credit Losses | 0 |  | 0 |  |  |
Obligations of states and political subdivisions |  |  |  |  |  |
Available-for-Sale Securities |  |  |  |  |  |
Amortized Cost | 181,095 |  | 183,766 |  |  |
Gross Unrealized Gains | 12 |  | 0 |  |  |
Gross Unrealized Losses | (16,704) |  | (19,126) |  |  |
Estimated Fair Value | 164,403 |  | 164,640 |  |  |
Allowance for Credit Losses | 0 |  | 0 |  |  |
Held-to-Maturity Securities |  |  |  |  |  |
Amortized Cost | 192,272 |  | 192,156 |  |  |
Gross Unrealized Gains | 61 |  | 54 |  |  |
Gross Unrealized Losses | (14,824) |  | (17,392) |  |  |
Estimated Fair Value | 177,509 |  | 174,818 |  |  |
Allowance for Credit Losses | 21 |  | 12 |  |  |
U.S. Government sponsored entities and agencies collateralized by residential mortgage obligations |  |  |  |  |  |
Available-for-Sale Securities |  |  |  |  |  |
Amortized Cost | 69,795 |  | 76,732 |  |  |
Gross Unrealized Gains | 134 |  | 8 |  |  |
Gross Unrealized Losses | (3,267) |  | (4,438) |  |  |
Estimated Fair Value | 66,662 |  | 72,302 |  |  |
Allowance for Credit Losses | 0 |  | 0 |  |  |
Held-to-Maturity Securities |  |  |  |  |  |
Amortized Cost | 11,355 |  | 11,095 |  |  |
Gross Unrealized Gains | 0 |  | 0 |  |  |
Gross Unrealized Losses | (1,631) |  | (2,100) |  |  |
Estimated Fair Value | 9,724 |  | 8,995 |  |  |
Allowance for Credit Losses | 0 |  | 0 |  |  |
Private label mortgage and asset backed securities |  |  |  |  |  |
Available-for-Sale Securities |  |  |  |  |  |
Amortized Cost | 254,400 |  | 265,302 |  |  |
Gross Unrealized Gains | 6 |  | 6 |  |  |
Gross Unrealized Losses | (22,394) |  | (34,753) |  |  |
Estimated Fair Value | 232,012 |  | 230,555 |  |  |
Allowance for Credit Losses | 0 |  | 0 |  |  |
Held-to-Maturity Securities |  |  |  |  |  |
Amortized Cost | 51,813 |  | 53,066 |  |  |
Gross Unrealized Gains | 0 |  | 0 |  |  |
Gross Unrealized Losses | (3,198) |  | (5,633) |  |  |
Estimated Fair Value | 48,615 |  | 47,433 |  |  |
Allowance for Credit Losses | 51 |  | 8 |  |  |
Corporate debt securities |  |  |  |  |  |
Available-for-Sale Securities |  |  |  |  |  |
Amortized Cost | 461 |  | 470 |  |  |
Gross Unrealized Gains | 33 |  | 23 |  |  |
Gross Unrealized Losses | 0 |  | 0 |  |  |
Estimated Fair Value | 494 |  | 493 |  |  |
Allowance for Credit Losses | 0 |  |  |  |  |
Held-to-Maturity Securities |  |  |  |  |  |
Amortized Cost | 32,366 |  | 46,198 |  |  |
Gross Unrealized Gains | 0 |  | 0 |  |  |
Gross Unrealized Losses | (1,508) |  | (2,876) |  |  |
Estimated Fair Value | 30,858 |  | 43,322 |  |  |
Allowance for Credit Losses | $ 652 |  | $ 1,136 |  |  |

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