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Fair Value (Details) - USD ($) | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Estimated Fair Value | $ 394,084,000 | $ 445,394,000
U.S. Government sponsored enterprises |  |
Estimated Fair Value | 10,745,000 | 11,539,000
U.S. Government sponsored enterprises | Level 1 |  |
Estimated Fair Value | 0 | 0
U.S. Government sponsored enterprises | Level 2 |  |
Estimated Fair Value | 10,745,000 | 11,539,000
U.S. Government sponsored enterprises | Level 3 |  |
Estimated Fair Value | 0 | 0
Mortgage-backed securities |  |
Estimated Fair Value | 259,867,000 | 273,838,000
Mortgage-backed securities | Level 1 |  |
Estimated Fair Value | 0 | 0
Mortgage-backed securities | Level 2 |  |
Estimated Fair Value | 259,867,000 | 273,838,000
Mortgage-backed securities | Level 3 |  |
Estimated Fair Value | 0 | 0
State and political subdivisions |  |
Estimated Fair Value | 98,344,000 | 150,203,000
State and political subdivisions | Level 1 |  |
Estimated Fair Value | 0 | 0
State and political subdivisions | Level 2 |  |
Estimated Fair Value | 98,344,000 | 150,203,000
State and political subdivisions | Level 3 |  |
Estimated Fair Value | 0 | 0
US Treasury Securities [Member] |  |
Estimated Fair Value | 9,838,000 | 9,814,000
US Treasury Securities [Member] | Level 1 |  |
Estimated Fair Value | 0 | 0
US Treasury Securities [Member] | Level 2 |  |
Estimated Fair Value | 9,838,000 | 9,814,000
US Treasury Securities [Member] | Level 3 |  |
Estimated Fair Value | 0 | 0
Mutual funds held in deferred compensation trust |  |
Mutual Funds Held In Deferred Compensation Trust | 1,850,000 | 1,327,000
Mutual funds held in deferred compensation trust | Level 1 |  |
Mutual Funds Held In Deferred Compensation Trust | 0 | 0
Mutual funds held in deferred compensation trust | Level 2 |  |
Mutual Funds Held In Deferred Compensation Trust | 1,850,000 | 1,327,000
Mutual funds held in deferred compensation trust | Level 3 |  |
Mutual Funds Held In Deferred Compensation Trust | $ 0 | $ 0

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