Investment Securities - Schedule of Amortized Cost and Estimated Fair Value, AFS, HTM and Restricted Equity Securities (Details) - USD ($) |
Mar. 31, 2026 |
Dec. 31, 2025 |
Mar. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|---|---|
| Securities available for sale | ||||
| Amortized Cost | $ 298,293,000 | $ 304,153,000 | $ 329,753,000 | |
| Unrealized Gains | 223,000 | 446,000 | 394,000 | |
| Unrealized Losses | (41,728,000) | (40,119,000) | (49,383,000) | |
| Fair Value (Estimated) | 256,788,000 | 264,480,000 | 280,764,000 | |
| Securities to be held to maturity | ||||
| Amortized Cost | 354,202,000 | 356,074,000 | 368,768,000 | |
| Unrealized Gains | 219,000 | 329,000 | 90,000 | |
| Unrealized Losses | (45,745,000) | (40,921,000) | (56,070,000) | |
| Fair Value (Estimated) | 308,676,000 | 315,482,000 | 312,788,000 | |
| Less allowance for credit losses | (145,000) | (146,000) | (197,000) | $ (196,000) |
| Net securities to be held to maturity | 354,057,000 | 355,928,000 | 368,571,000 | |
| Restricted equity securities | ||||
| Federal Home Loan Bank Stock | 7,277,000 | 7,238,000 | 6,472,000 | |
| Federal Reserve Bank Stock | 1,037,000 | 1,037,000 | 1,037,000 | |
| Restricted equity securities | 8,314,000 | 8,275,000 | 7,509,000 | |
| U.S. Treasury & Agency securities | ||||
| Securities available for sale | ||||
| Amortized Cost | 23,045,000 | 23,045,000 | 24,543,000 | |
| Unrealized Gains | 0 | 0 | 0 | |
| Unrealized Losses | (5,087,000) | (4,973,000) | (5,593,000) | |
| Fair Value (Estimated) | 17,958,000 | 18,072,000 | 18,950,000 | |
| Securities to be held to maturity | ||||
| Amortized Cost | 38,100,000 | 38,100,000 | 38,100,000 | |
| Unrealized Gains | 0 | 0 | 0 | |
| Unrealized Losses | (8,325,000) | (8,221,000) | (8,904,000) | |
| Fair Value (Estimated) | 29,775,000 | 29,879,000 | 29,196,000 | |
| Less allowance for credit losses | 0 | |||
| Mortgage-backed securities | ||||
| Securities available for sale | ||||
| Amortized Cost | 236,884,000 | 240,166,000 | 262,912,000 | |
| Unrealized Gains | 210,000 | 410,000 | 381,000 | |
| Unrealized Losses | (30,780,000) | (30,142,000) | (36,416,000) | |
| Fair Value (Estimated) | 206,314,000 | 210,434,000 | 226,877,000 | |
| Securities to be held to maturity | ||||
| Amortized Cost | 47,634,000 | 48,566,000 | 51,600,000 | |
| Unrealized Gains | 72,000 | 116,000 | 52,000 | |
| Unrealized Losses | (8,975,000) | (8,924,000) | (10,402,000) | |
| Fair Value (Estimated) | 38,731,000 | 39,758,000 | 41,250,000 | |
| State and political subdivisions | ||||
| Securities available for sale | ||||
| Amortized Cost | 36,461,000 | 38,953,000 | 40,130,000 | |
| Unrealized Gains | 0 | 26,000 | 0 | |
| Unrealized Losses | (5,861,000) | (4,989,000) | (7,368,000) | |
| Fair Value (Estimated) | 30,600,000 | 33,990,000 | 32,762,000 | |
| Securities to be held to maturity | ||||
| Amortized Cost | 247,468,000 | 248,408,000 | 251,818,000 | |
| Unrealized Gains | 71,000 | 161,000 | 38,000 | |
| Unrealized Losses | (27,768,000) | (22,972,000) | (34,924,000) | |
| Fair Value (Estimated) | 219,771,000 | 225,597,000 | 216,932,000 | |
| Less allowance for credit losses | (67,000) | (68,000) | (81,000) | (80,000) |
| Asset-backed securities | ||||
| Securities available for sale | ||||
| Amortized Cost | 1,903,000 | 1,989,000 | 2,168,000 | |
| Unrealized Gains | 13,000 | 10,000 | 13,000 | |
| Unrealized Losses | 0 | (15,000) | (6,000) | |
| Fair Value (Estimated) | 1,916,000 | 1,984,000 | 2,175,000 | |
| Corporate securities | ||||
| Securities to be held to maturity | ||||
| Amortized Cost | 21,000,000 | 21,000,000 | 27,250,000 | |
| Unrealized Gains | 76,000 | 52,000 | 0 | |
| Unrealized Losses | (677,000) | (804,000) | (1,840,000) | |
| Fair Value (Estimated) | 20,399,000 | 20,248,000 | 25,410,000 | |
| Less allowance for credit losses | $ (78,000) | $ (78,000) | $ (116,000) | $ (116,000) |