Investment Securities - Schedule of Amortized Cost and Estimated Fair Value, AFS, HTM and Restricted Equity Securities (Details) - USD ($) |
Jun. 30, 2026 |
Mar. 31, 2026 |
Dec. 31, 2025 |
Jun. 30, 2025 |
Mar. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|---|---|---|---|
| Securities available for sale | ||||||
| Amortized Cost | $ 317,100,000 | $ 304,153,000 | $ 325,381,000 | |||
| Unrealized Gains | 151,000 | 446,000 | 497,000 | |||
| Unrealized Losses | (41,219,000) | (40,119,000) | (47,630,000) | |||
| Fair Value (Estimated) | 276,032,000 | 264,480,000 | 278,248,000 | |||
| Securities to be held to maturity | ||||||
| Amortized Cost | 352,134,000 | 356,074,000 | 368,071,000 | |||
| Unrealized Gains | 243,000 | 329,000 | 122,000 | |||
| Unrealized Losses | (41,156,000) | (40,921,000) | (55,685,000) | |||
| Fair Value (Estimated) | 311,221,000 | 315,482,000 | 312,508,000 | |||
| Less allowance for credit losses | (143,000) | $ (145,000) | (146,000) | (198,000) | $ (197,000) | $ (196,000) |
| Net securities to be held to maturity | 351,991,000 | 355,928,000 | 367,873,000 | |||
| Restricted equity securities | ||||||
| Federal Home Loan Bank Stock | 7,700,000 | 7,238,000 | 6,697,000 | |||
| Federal Reserve Bank Stock | 1,037,000 | 1,037,000 | 1,037,000 | |||
| Restricted equity securities | 8,737,000 | 8,275,000 | 7,734,000 | |||
| U.S. Treasury & Agency securities | ||||||
| Securities available for sale | ||||||
| Amortized Cost | 24,044,000 | 23,045,000 | 24,544,000 | |||
| Unrealized Gains | 0 | 0 | 0 | |||
| Unrealized Losses | (5,129,000) | (4,973,000) | (5,510,000) | |||
| Fair Value (Estimated) | 18,915,000 | 18,072,000 | 19,034,000 | |||
| Securities to be held to maturity | ||||||
| Amortized Cost | 38,100,000 | 38,100,000 | 38,100,000 | |||
| Unrealized Gains | 0 | 0 | 0 | |||
| Unrealized Losses | (8,373,000) | (8,221,000) | (8,879,000) | |||
| Fair Value (Estimated) | 29,727,000 | 29,879,000 | 29,221,000 | |||
| Less allowance for credit losses | 0 | |||||
| Mortgage-backed securities | ||||||
| Securities available for sale | ||||||
| Amortized Cost | 254,781,000 | 240,166,000 | 258,633,000 | |||
| Unrealized Gains | 128,000 | 410,000 | 487,000 | |||
| Unrealized Losses | (30,995,000) | (30,142,000) | (34,704,000) | |||
| Fair Value (Estimated) | 223,914,000 | 210,434,000 | 224,416,000 | |||
| Securities to be held to maturity | ||||||
| Amortized Cost | 46,665,000 | 48,566,000 | 50,510,000 | |||
| Unrealized Gains | 50,000 | 116,000 | 78,000 | |||
| Unrealized Losses | (8,910,000) | (8,924,000) | (10,211,000) | |||
| Fair Value (Estimated) | 37,805,000 | 39,758,000 | 40,377,000 | |||
| State and political subdivisions | ||||||
| Securities available for sale | ||||||
| Amortized Cost | 36,445,000 | 38,953,000 | 40,087,000 | |||
| Unrealized Gains | 5,000 | 26,000 | 0 | |||
| Unrealized Losses | (5,095,000) | (4,989,000) | (7,400,000) | |||
| Fair Value (Estimated) | 31,355,000 | 33,990,000 | 32,687,000 | |||
| Securities to be held to maturity | ||||||
| Amortized Cost | 246,369,000 | 248,408,000 | 251,461,000 | |||
| Unrealized Gains | 113,000 | 161,000 | 44,000 | |||
| Unrealized Losses | (23,310,000) | (22,972,000) | (34,833,000) | |||
| Fair Value (Estimated) | 223,172,000 | 225,597,000 | 216,672,000 | |||
| Less allowance for credit losses | (66,000) | (67,000) | (68,000) | (79,000) | (81,000) | (80,000) |
| Asset-backed securities | ||||||
| Securities available for sale | ||||||
| Amortized Cost | 1,830,000 | 1,989,000 | 2,117,000 | |||
| Unrealized Gains | 18,000 | 10,000 | 10,000 | |||
| Unrealized Losses | 0 | (15,000) | (16,000) | |||
| Fair Value (Estimated) | 1,848,000 | 1,984,000 | 2,111,000 | |||
| Corporate securities | ||||||
| Securities to be held to maturity | ||||||
| Amortized Cost | 21,000,000 | 21,000,000 | 28,000,000 | |||
| Unrealized Gains | 80,000 | 52,000 | 0 | |||
| Unrealized Losses | (563,000) | (804,000) | (1,762,000) | |||
| Fair Value (Estimated) | 20,517,000 | 20,248,000 | 26,238,000 | |||
| Less allowance for credit losses | $ (77,000) | $ (78,000) | $ (78,000) | $ (119,000) | $ (116,000) | $ (116,000) |