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Income Taxes - Summary of Provision 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, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2015	Dec. 31, 2014		Dec. 31, 2013
Current:
Federal													$ 5,833	$ (7,058)		$ 5,391
State													921	(640)		1,058
Current income tax expense													6,754	(7,698)		6,449
Deferred:
Federal													1,854	(10,294)		(720)
State													1,044	894		(85)
Deferred income taxes													2,898	(9,400)		(805)
Total (benefit) provision for income taxes	$ 2,413	$ 5,540	$ 5,040	$ (3,341)	$ 7,452	$ 8,848	$ (31,558)	$ (1,840)	$ 843	$ 3,711	$ 2,704	$ (1,614)	$ 9,652	$ (17,098)	[1]	$ 5,644	[1]
[1] See Note 2. Restatement of Previously Issued Consolidated Financial Statements

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