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Investment Securities - Schedule of Amortized Cost and Estimated Fair Value, AFS, HTM and Restricted Equity Securities (Details) - USD ($) | Mar. 31, 2025 | Dec. 31, 2024 | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | --- | --- | ---
Securities available for sale |  |  |  |
Amortized Cost | $ 329,753,000 | $ 328,693,000 | $ 328,648,000 |
Unrealized Gains | 394,000 | 155,000 | 119,000 |
Unrealized Losses | (49,383,000) | (54,168,000) | (54,316,000) |
Fair Value (Estimated) | 280,764,000 | 274,680,000 | 274,451,000 |
Securities to be held to maturity |  |  |  |
Amortized Cost | 368,768,000 | 369,900,000 | 379,635,000 |
Unrealized Gains | 90,000 | 98,000 | 190,000 |
Unrealized Losses | (56,070,000) | (55,005,000) | (52,009,000) |
Fair Value (Estimated) | 312,788,000 | 314,993,000 | 327,816,000 |
Less allowance for credit losses | (197,000) | (196,000) | (182,000) | $ (434,000)
Net securities to be held to maturity | 368,571,000 | 369,704,000 | 379,453,000 |
Restricted equity securities |  |  |  |
Federal Home Loan Bank Stock | 6,472,000 | 6,166,000 | 4,896,000 |
Federal Reserve Bank Stock | 1,037,000 | 1,037,000 | 1,037,000 |
Restricted equity securities | 7,509,000 | 7,203,000 | 5,933,000 |
U.S. Treasury & Agency securities |  |  |  |
Securities available for sale |  |  |  |
Amortized Cost | 24,543,000 | 26,042,000 | 26,036,000 |
Unrealized Gains | 0 | 0 | 0 |
Unrealized Losses | (5,593,000) | (6,246,000) | (6,343,000) |
Fair Value (Estimated) | 18,950,000 | 19,796,000 | 19,693,000 |
Securities to be held to maturity |  |  |  |
Amortized Cost | 38,100,000 | 38,100,000 | 38,100,000 |
Unrealized Gains | 0 | 0 | 0 |
Unrealized Losses | (8,904,000) | (9,938,000) | (9,851,000) |
Fair Value (Estimated) | 29,196,000 | 28,162,000 | 28,249,000 |
Less allowance for credit losses | 0 |  |  |
Mortgage-backed securities |  |  |  |
Securities available for sale |  |  |  |
Amortized Cost | 262,912,000 | 260,267,000 | 259,538,000 |
Unrealized Gains | 381,000 | 141,000 | 99,000 |
Unrealized Losses | (36,416,000) | (41,026,000) | (41,635,000) |
Fair Value (Estimated) | 226,877,000 | 219,382,000 | 218,002,000 |
Securities to be held to maturity |  |  |  |
Amortized Cost | 51,600,000 | 52,370,000 | 55,483,000 |
Unrealized Gains | 52,000 | 15,000 | 15,000 |
Unrealized Losses | (10,402,000) | (11,360,000) | (11,258,000) |
Fair Value (Estimated) | 41,250,000 | 41,025,000 | 44,240,000 |
State and political subdivisions |  |  |  |
Securities available for sale |  |  |  |
Amortized Cost | 40,130,000 | 40,148,000 | 40,288,000 |
Unrealized Gains | 0 | 0 | 0 |
Unrealized Losses | (7,368,000) | (6,896,000) | (6,338,000) |
Fair Value (Estimated) | 32,762,000 | 33,252,000 | 33,950,000 |
Securities to be held to maturity |  |  |  |
Amortized Cost | 251,818,000 | 252,180,000 | 254,302,000 |
Unrealized Gains | 38,000 | 83,000 | 175,000 |
Unrealized Losses | (34,924,000) | (31,739,000) | (27,879,000) |
Fair Value (Estimated) | 216,932,000 | 220,524,000 | 226,598,000 |
Less allowance for credit losses | (81,000) | (80,000) | (69,000) | (212,000)
Asset-backed securities |  |  |  |
Securities available for sale |  |  |  |
Amortized Cost | 2,168,000 | 2,236,000 | 2,786,000 |
Unrealized Gains | 13,000 | 14,000 | 20,000 |
Unrealized Losses | (6,000) | 0 | 0 |
Fair Value (Estimated) | 2,175,000 | 2,250,000 | 2,806,000 |
Corporate securities |  |  |  |
Securities to be held to maturity |  |  |  |
Amortized Cost | 27,250,000 | 27,250,000 | 31,750,000 |
Unrealized Gains | 0 | 0 | 0 |
Unrealized Losses | (1,840,000) | (1,968,000) | (3,021,000) |
Fair Value (Estimated) | 25,410,000 | 25,282,000 | 28,729,000 |
Less allowance for credit losses | $ (116,000) | $ (116,000) | $ (113,000) | $ (222,000)

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