Income Taxes - Income Tax Expense (Benefit) from Continuing Operations (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current:
Federal	$ 167	$ (8,856)	$ 1,681
State	(57)	372	773
Deferred:
Federal	670	4,973	1,702
State	2,676	2,104	1,948
Total income tax expense (benefit)	$ 3,456	$ (1,407)	$ 6,104