Income Taxes - Reconciliation between applicable income taxes and statutory federal tax rate (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Tax amount
Taxes at statutory federal income tax rate	$ 1,708	$ 2,444	$ 3,497	$ 4,648
Tax exempt income	(239)	(156)	(468)	(300)
State income taxes, net of federal benefits	398	485	812	946
Nondeductible items and other	56	(238)	173	(453)
Applicable income taxes	$ 1,923	$ 2,535	$ 4,014	$ 4,841
Percentage of pretax income
Taxes at statutory federal income tax rate (as percentage)	21.00%	21.00%	21.00%	21.00%
Tax exempt income (as percentage)	(2.90%)	(1.30%)	(2.80%)	(1.40%)
State income taxes, net of federal benefits (as percentage)	4.90%	4.10%	4.90%	4.30%
Nondeductible items and other (as percentage)	0.70%	(2.00%)	1.00%	(2.00%)
Applicable income taxes (as percentage)	23.70%	21.80%	24.10%	21.90%