Income Taxes - Components of Income Tax Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Current
Federal	$ 1,305	$ 1,642	$ 1,676	$ 2,235
State	552	679	719	932
Total current expense	1,857	2,321	2,395	3,167
Deferred
Federal	(217)	(286)	601	238
State	(100)	(134)	284	112
Total deferred	(317)	(420)	885	350
Total income tax expense	$ 1,540	$ 1,901	$ 3,280	$ 3,517