Income Taxes - Provision (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current:
Federal	$ 12,492	$ 3,953	$ 11,897
State	3,067	1,736	988
Current income tax expense (benefit)	15,559	5,689	12,885
Deferred:
Federal	(1,442)	5,001	(17,264)
State	(666)	1,164	1,970
Deferred income tax expense (benefit)	(2,108)	6,165	(15,294)
Income Tax Expense (Benefit)	$ 13,451	$ 11,854	$ (2,409)