Investment Securities - Schedule of Amortized Cost and Estimated Fair Value, AFS, HTM and Restricted Equity Securities (Details) - USD ($) |
Jun. 30, 2025 |
Mar. 31, 2025 |
Dec. 31, 2024 |
Jun. 30, 2024 |
Mar. 31, 2024 |
Dec. 31, 2023 |
|---|---|---|---|---|---|---|
| Securities available for sale | ||||||
| Amortized Cost | $ 325,381,000 | $ 328,693,000 | $ 328,398,000 | |||
| Unrealized Gains | 497,000 | 155,000 | 69,000 | |||
| Unrealized Losses | (47,630,000) | (54,168,000) | (54,966,000) | |||
| Fair Value (Estimated) | 278,248,000 | 274,680,000 | 273,501,000 | |||
| Securities to be held to maturity | ||||||
| Amortized Cost | 368,071,000 | 369,900,000 | 377,671,000 | |||
| Unrealized Gains | 122,000 | 98,000 | 116,000 | |||
| Unrealized Losses | (55,685,000) | (55,005,000) | (56,171,000) | |||
| Fair Value (Estimated) | 312,508,000 | 314,993,000 | 321,616,000 | |||
| Less allowance for credit losses | (198,000) | $ (197,000) | (196,000) | (149,000) | $ (182,000) | $ (434,000) |
| Net securities to be held to maturity | 367,873,000 | 369,704,000 | 377,522,000 | |||
| Restricted equity securities | ||||||
| Federal Home Loan Bank Stock | 6,697,000 | 6,166,000 | 6,073,000 | |||
| Federal Reserve Bank Stock | 1,037,000 | 1,037,000 | 1,037,000 | |||
| Restricted equity securities | 7,734,000 | 7,203,000 | 7,110,000 | |||
| U.S. Treasury & Agency securities | ||||||
| Securities available for sale | ||||||
| Amortized Cost | 24,544,000 | 26,042,000 | 26,038,000 | |||
| Unrealized Gains | 0 | 0 | 0 | |||
| Unrealized Losses | (5,510,000) | (6,246,000) | (6,260,000) | |||
| Fair Value (Estimated) | 19,034,000 | 19,796,000 | 19,778,000 | |||
| Securities to be held to maturity | ||||||
| Amortized Cost | 38,100,000 | 38,100,000 | 38,100,000 | |||
| Unrealized Gains | 0 | 0 | 0 | |||
| Unrealized Losses | (8,879,000) | (9,938,000) | (10,063,000) | |||
| Fair Value (Estimated) | 29,221,000 | 28,162,000 | 28,037,000 | |||
| Less allowance for credit losses | 0 | |||||
| Mortgage-backed securities | ||||||
| Securities available for sale | ||||||
| Amortized Cost | 258,633,000 | 260,267,000 | 259,574,000 | |||
| Unrealized Gains | 487,000 | 141,000 | 50,000 | |||
| Unrealized Losses | (34,704,000) | (41,026,000) | (41,801,000) | |||
| Fair Value (Estimated) | 224,416,000 | 219,382,000 | 217,823,000 | |||
| Securities to be held to maturity | ||||||
| Amortized Cost | 50,510,000 | 52,370,000 | 54,501,000 | |||
| Unrealized Gains | 78,000 | 15,000 | 11,000 | |||
| Unrealized Losses | (10,211,000) | (11,360,000) | (11,352,000) | |||
| Fair Value (Estimated) | 40,377,000 | 41,025,000 | 43,160,000 | |||
| State and political subdivisions | ||||||
| Securities available for sale | ||||||
| Amortized Cost | 40,087,000 | 40,148,000 | 40,272,000 | |||
| Unrealized Gains | 0 | 0 | 0 | |||
| Unrealized Losses | (7,400,000) | (6,896,000) | (6,902,000) | |||
| Fair Value (Estimated) | 32,687,000 | 33,252,000 | 33,370,000 | |||
| Securities to be held to maturity | ||||||
| Amortized Cost | 251,461,000 | 252,180,000 | 252,820,000 | |||
| Unrealized Gains | 44,000 | 83,000 | 105,000 | |||
| Unrealized Losses | (34,833,000) | (31,739,000) | (32,268,000) | |||
| Fair Value (Estimated) | 216,672,000 | 220,524,000 | 220,657,000 | |||
| Less allowance for credit losses | (79,000) | (81,000) | (80,000) | (56,000) | (69,000) | (212,000) |
| Asset-backed securities | ||||||
| Securities available for sale | ||||||
| Amortized Cost | 2,117,000 | 2,236,000 | 2,514,000 | |||
| Unrealized Gains | 10,000 | 14,000 | 19,000 | |||
| Unrealized Losses | (16,000) | 0 | (3,000) | |||
| Fair Value (Estimated) | 2,111,000 | 2,250,000 | 2,530,000 | |||
| Corporate securities | ||||||
| Securities to be held to maturity | ||||||
| Amortized Cost | 28,000,000 | 27,250,000 | 32,250,000 | |||
| Unrealized Gains | 0 | 0 | 0 | |||
| Unrealized Losses | (1,762,000) | (1,968,000) | (2,488,000) | |||
| Fair Value (Estimated) | 26,238,000 | 25,282,000 | 29,762,000 | |||
| Less allowance for credit losses | $ (119,000) | $ (116,000) | $ (116,000) | $ (93,000) | $ (113,000) | $ (222,000) |