Income Taxes - Summary of Provision (Benefit) for Income Taxes from Continuing Operations (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current:
Federal	$ 6,442	$ 5,833	$ (7,058)
State	2,030	921	(640)
Current income tax expense	8,472	6,754	(7,698)
Deferred:
Federal	85	1,854	(10,294)
State	(1,770)	1,044	894
Deferred income taxes	(1,685)	2,898	(9,400)
Total provision (benefit)	$ 6,787	$ 9,652	$ (17,098)