Income Taxes - (Provision) Benefit for Income Taxes from Continuing Operations (Detail) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended								12 Months Ended
	Dec. 31, 2015	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										$ (763)	$ (2,071)	$ 4,528
State										(1,229)	(2,339)	(1,396)
Total current (provision) benefit										(1,992)	(4,410)	3,132
DEFERRED:
Federal										8,866	2,588	84,918
State										(248)	3,289	4,612
Effect of federal tax law change	$ 5,200									5,229
Total deferred benefit										13,847	5,877	89,530
Total benefit for income taxes		$ 8,430	$ 4,612	$ (866)	$ (321)	$ 1,096	$ 463	$ (576)	$ 484	$ 11,855	$ 1,467	$ 92,662