Income Taxes - Effective Income Tax Rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Federal statutory tax rate	21.00%	21.00%
Computed income tax expense at statutory rate	$ 8,742	$ 9,362	$ 7,916
State income taxes, net of federal tax benefit	2,218	2,364	2,151
Tax-exempt income, net of disallowance	(865)	(894)	(1,034)
Bank-owned life insurance income, net	(123)	(134)	(141)
Tax expense (benefit) from stock compensation	25	(137)	(302)
Other	175	(180)	226
Total income tax expense	$ 10,172	$ 10,381	$ 8,816
Effective income tax rate	24.40%	23.30%	23.40%