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Securities & Allowance for Securities Credit Losses - Schedule of Amortized Cost and Fair Value (Details) - USD ($) | Sep. 30, 2024 | Jun. 30, 2024 | Dec. 31, 2023 | Sep. 30, 2023 | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | --- | --- | --- | --- | ---
Available for Sale |  |  |  |  |  |  |
Amortized Cost | $ 300,353,000 |  | $ 268,152,000 |  |  |  |
Gross Unrealized Gains | 202,000 |  | 82,000 |  |  |  |
Gross Unrealized (Losses) | (5,801,000) |  | (10,120,000) |  |  |  |
Fair Value | 294,754,000 |  | 258,114,000 | [1] |  |  |
Allowance for Credit Losses | 0 |  | 0 |  | $ 0 |  | $ 0
Held to Maturity |  |  |  |  |  |  |
Amortized Cost | 302,609,000 |  | 308,406,000 |  |  |  |
Gross Unrealized Gains | 119,000 |  | 65,000 |  |  |  |
Gross Unrealized (Losses) | (16,948,000) |  | (24,555,000) |  |  |  |
Fair Value | 285,780,000 |  | 283,916,000 |  |  |  |
Allowance for Credit Losses | (261,000) | $ (248,000) | (348,000) |  | (348,000) | $ (342,000) | 0
Total securities, Amortized Cost | 602,962,000 |  | 576,558,000 |  |  |  |
Total securities, Accumulated Unrecognized Gain | 321,000 |  | 147,000 |  |  |  |
Total securities, Accumulated Unrecognized Loss | (22,749,000) |  | (34,675,000) |  |  |  |
Total securities, Fair Value | 580,534,000 |  | 542,030,000 |  |  |  |
Total securities, Allowance for Credit Losses | (261,000) |  | (348,000) |  |  |  |
U.S. government and federal agencies |  |  |  |  |  |  |
Available for Sale |  |  |  |  |  |  |
Amortized Cost | 131,089,000 |  | 95,129,000 |  |  |  |
Gross Unrealized Gains | 52,000 |  | 32,000 |  |  |  |
Gross Unrealized (Losses) | (1,416,000) |  | (2,864,000) |  |  |  |
Fair Value | 129,725,000 |  | 92,297,000 |  |  |  |
Allowance for Credit Losses | 0 |  | 0 |  | 0 |  | 0
Held to Maturity |  |  |  |  |  |  |
Amortized Cost | 122,447,000 |  | 123,938,000 |  |  |  |
Gross Unrealized Gains | 6,000 |  | 0 |  |  |  |
Gross Unrealized (Losses) | (7,236,000) |  | (10,069,000) |  |  |  |
Fair Value | 115,217,000 |  | 113,869,000 |  |  |  |
Allowance for Credit Losses | 0 | 0 | 0 |  | 0 | 0 | 0
Mortgage backed securities |  |  |  |  |  |  |
Available for Sale |  |  |  |  |  |  |
Amortized Cost | 8,658,000 |  | 9,247,000 |  |  |  |
Gross Unrealized Gains | 0 |  | 11,000 |  |  |  |
Gross Unrealized (Losses) | (429,000) |  | (609,000) |  |  |  |
Fair Value | 8,229,000 |  | 8,649,000 |  |  |  |
Allowance for Credit Losses | 0 |  | 0 |  |  |  |
Held to Maturity |  |  |  |  |  |  |
Amortized Cost | 1,173,000 |  | 1,190,000 |  |  |  |
Gross Unrealized Gains | 0 |  | 0 |  |  |  |
Gross Unrealized (Losses) | (1,000) |  | (17,000) |  |  |  |
Fair Value | 1,172,000 |  | 1,173,000 |  |  |  |
Allowance for Credit Losses | 0 |  | 0 |  |  |  |
Corporate Bonds |  |  |  |  |  |  |
Available for Sale |  |  |  |  |  |  |
Amortized Cost | 53,283,000 |  | 57,304,000 |  |  |  |
Gross Unrealized Gains | 62,000 |  | 5,000 |  |  |  |
Gross Unrealized (Losses) | (750,000) |  | (1,837,000) |  |  |  |
Fair Value | 52,595,000 |  | 55,472,000 |  |  |  |
Allowance for Credit Losses | 0 |  | 0 |  | 0 |  | 0
Held to Maturity |  |  |  |  |  |  |
Amortized Cost | 58,409,000 |  | 59,629,000 |  |  |  |
Gross Unrealized Gains | 90,000 |  | 59,000 |  |  |  |
Gross Unrealized (Losses) | (1,545,000) |  | (3,027,000) |  |  |  |
Fair Value | 56,954,000 |  | 56,661,000 |  |  |  |
Allowance for Credit Losses | (230,000) | (215,000) | (322,000) |  | (308,000) | (316,000) | 0
State and municipal securities |  |  |  |  |  |  |
Available for Sale |  |  |  |  |  |  |
Amortized Cost | 107,323,000 |  | 106,472,000 |  |  |  |
Gross Unrealized Gains | 88,000 |  | 34,000 |  |  |  |
Gross Unrealized (Losses) | (3,206,000) |  | (4,810,000) |  |  |  |
Fair Value | 104,205,000 |  | 101,696,000 |  |  |  |
Allowance for Credit Losses | 0 |  | 0 |  | 0 |  | 0
Held to Maturity |  |  |  |  |  |  |
Amortized Cost | 120,580,000 |  | 123,649,000 |  |  |  |
Gross Unrealized Gains | 23,000 |  | 6,000 |  |  |  |
Gross Unrealized (Losses) | (8,166,000) |  | (11,442,000) |  |  |  |
Fair Value | 112,437,000 |  | 112,213,000 |  |  |  |
Allowance for Credit Losses | $ (31,000) | $ (33,000) | $ (26,000) |  | $ (40,000) | $ (26,000) | $ 0
[1] | Derived from audited financial statements.

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