Income Taxes - Components of Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current
Federal	$ 23,066	$ 18,864	$ 15,670
State	6,129	3,668	1,985
Total current tax expense (benefit)	29,195	22,532	17,655
Deferred
Federal	3,535	5,901	20,895
State	2,447	4,528	1,940
Total deferred tax expense (benefit)	5,982	10,429	22,835
Income tax expense (benefit)	$ 35,177	$ 32,961	$ 40,490