Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reconciliation of effective income tax rate with federal statutory tax rate
Expected tax expense, Amount	$ 12,782	$ 13,039	$ 10,484
Expected tax expense, Percent Of Pretax Income	21.00%	21.00%	21.00%
Tax-exempt interest, Amount	$ (1,216)	$ (1,176)	$ (1,219)
Tax-exempt interest, Percent Of Pretax Income	(2.00%)	(1.90%)	(2.40%)
Interest expense limitation, Amount	$ 47	$ 50	$ 79
Interest expenses limitation, Percent Of Pretax Income	0.10%	0.10%	0.10%
State income taxes, net of federal income tax benefit, Amount	$ 2,337	$ 2,265	$ 2,030
State income taxes, net of federal income tax benefit, Percent Of Pretax Income	3.80%	3.70%	4.10%
Income tax credits, Amount	$ (475)	$ (475)	$ (51)
Income tax credits, Percent Of Pretax Income	(0.80%)	(0.80%)	(0.10%)
Other, Amount	$ (361)	$ 304	$ (46)
Other, Percent Of Pretax Income	(0.60%)	0.50%	(0.10%)
Total	$ 13,114	$ 14,007	$ 11,277
Total, Percent Of Pretax Income	21.50%	22.60%	22.60%