Income Taxes - Schedule of Components of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current income tax expense:
Federal	$ 13,518	$ 17,910	$ 19,404
State	1,877	2,322	3,252
Current income tax expense	15,395	20,232	22,656
Deferred tax expense:
Federal	(424)	(241)	2,623
State	(31)	81	(129)
Deferred tax expense	(455)	(160)	2,494
Income Tax Expense	$ 14,940	$ 20,072	$ 25,150