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Securities - Securities Sold (Details) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2023	Sep. 30, 2022
Debt Securities, Available-for-sale [Line Items]
Carrying Value		$ 511,419,000
Net Proceeds	$ 0	488,981,000	$ 0
(Loss)		(22,438,000)
Obligations of other U.S. Government agencies and corporations
Debt Securities, Available-for-sale [Line Items]
Carrying Value		170,000,000
Net Proceeds		164,915,000
(Loss)		(5,085,000)
Obligations of states and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Carrying Value		104,950,000
Net Proceeds		99,439,000
(Loss)		(5,511,000)
Residential mortgage backed securities: | Government agency mortgage backed securities
Debt Securities, Available-for-sale [Line Items]
Carrying Value		137,196,000
Net Proceeds		130,602,000
(Loss)		(6,594,000)
Residential mortgage backed securities: | Government agency collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Carrying Value		54,028,000
Net Proceeds		51,101,000
(Loss)		(2,927,000)
Commercial mortgage backed securities: | Government agency mortgage backed securities
Debt Securities, Available-for-sale [Line Items]
Carrying Value		5,048,000
Net Proceeds		4,825,000
(Loss)		(223,000)
Commercial mortgage backed securities: | Government agency collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Carrying Value		40,197,000
Net Proceeds		38,099,000
(Loss)		$ (2,098,000)

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