Income Taxes - Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Federal (Current)									$ 7,081	$ 5,780	$ 8,456
Effect of tax act									0	0	2,710
Federal (Deferred)									(228)	179	(828)
Federal									6,853	5,959	10,338
State (Current)									4,771	3,819	3,604
State (Deferred)									133	129	(302)
State									4,904	3,948	3,302
Income Tax Expense (Benefit), Total	$ 2,902	$ 2,854	$ 3,169	$ 2,832	$ 2,997	$ 2,171	$ 2,643	$ 2,096	$ 11,757	$ 9,907	$ 13,640