Income Taxes, Components of Provision for Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current [Abstract]
Federal	$ 3,689	$ 3,056	$ 3,654
State	2,241	2,164	2,300
Current income tax expense	5,930	5,220	5,954
Deferred [Abstract]
Federal	(929)	472	(711)
State	(500)	(22)	(499)
Deferred income tax expense	(1,429)	450	(1,210)
Total income tax expense	$ 4,501	$ 5,670	$ 4,744