Income Taxes - Provision (Benefit) for Income Taxes from Continuing Operations (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current:
Federal									$ 8,954	$ 0	$ (16)
State									1,003	229	29
Current income tax expense (benefit)									9,957	229	13
Deferred:
Federal									3,174	5,010	(642)
State									(904)	(2,974)	(85)
Deferred income tax expense (benefit)									2,270	2,036	(727)
Total	$ 3,527	$ 1,042	$ 4,599	$ 3,059	$ 3,267	$ (1,169)	$ 86	$ 81	$ 12,227	$ 2,265	$ (714)