Accumulated Other Comprehensive Income (Loss) - Summary of Amounts Reclassified Out of Each Component of AOCI (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Salaries and employee benefits		$ (15,920)	$ (16,022)
Provision for income taxes		(2,362)	(2,656)
Net income		9,293	12,932
Reclassification out of Accumulated Other Comprehensive Income [Member] | Retirement Plans [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Salaries and employee benefits	[1],[2]	(222)	(2)
Provision for income taxes	[1]	58	0
Net income	[1]	(164)	(2)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Available-for-Sale Securities [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Net gains on sales and redemptions of investment securities	[1]	(1,932)	(160)
Provision for income taxes	[1]	505	42
Net income	[1]	$ (1,427)	$ (118)

[1] Amounts in parentheses indicates debits in net income.

[2] These items are included in net periodic pension cost.