Income Taxes, Components of Provision for Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current [Abstract]
Federal	$ 3,654	$ 4,611	$ 3,903
State	2,300	1,788	1,419
Current income tax expense	5,954	6,399	5,322
Deferred [Abstract]
Federal	(711)	1,914	(354)
State	(499)	5	(83)
Deferred income tax expense	(1,210)	1,919	(437)
Total income tax expense	$ 4,744	$ 8,318	$ 4,885