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Fair Value (Details) - USD ($)	Sep. 30, 2022	Dec. 31, 2021
Estimated Fair Value	$ 444,367,000	$ 406,549,000
U.S. Government sponsored enterprises
Estimated Fair Value	12,142,000	14,267,000
U.S. Government sponsored enterprises | Level 3
Estimated Fair Value	0	0
U.S. Government sponsored enterprises | Level 2
Estimated Fair Value	12,142,000	14,267,000
U.S. Government sponsored enterprises | Level 1
Estimated Fair Value	0	0
Mortgage-backed securities
Estimated Fair Value	271,899,000	217,152,000
Mortgage-backed securities | Level 3
Estimated Fair Value	0	0
Mortgage-backed securities | Level 2
Estimated Fair Value	271,899,000	217,152,000
Mortgage-backed securities | Level 1
Estimated Fair Value	0	0
State and political subdivisions
Estimated Fair Value	150,549,000	167,241,000
State and political subdivisions | Level 3
Estimated Fair Value	0	0
State and political subdivisions | Level 2
Estimated Fair Value	150,549,000	167,241,000
State and political subdivisions | Level 1
Estimated Fair Value	0	0
US Treasury Securities [Member]
Estimated Fair Value	9,777,000	7,889,000
US Treasury Securities [Member] | Level 3
Estimated Fair Value	0	0
US Treasury Securities [Member] | Level 2
Estimated Fair Value	9,777,000	7,889,000
US Treasury Securities [Member] | Level 1
Estimated Fair Value	0	0
Mutual funds held in deferred compensation trust
Mutual Funds Held In Deferred Compensation Trust	1,218,000	1,510,000
Mutual funds held in deferred compensation trust | Level 3
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	1,218,000	1,510,000
Mutual funds held in deferred compensation trust | Level 1
Mutual Funds Held In Deferred Compensation Trust	$ 0	$ 0

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