Income Taxes - Income Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Statutory rate times pre-tax income	$ 11,880	$ 7,119	$ 5,703
(Subtract) add the tax effect of:
Income from tax-exempt securities and loans	(4,217)	(4,464)	(4,881)
State income tax, net of federal tax effect	865	1,765	1,285
Bank-owned life insurance	(199)	(200)	(198)
Tax credits	(175)	(178)	(181)
Other differences	304	403	189
Total	$ 8,458	$ 4,445	$ 1,917