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Income Taxes - Schedule of Components of Income Tax Provision (Benefit) (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Income Tax Disclosure [Abstract]      
Federal $ 8,610 $ 12,661 $ 2,509
State 68 157 68
Total current tax provision 8,678 12,818 2,577
Deferred State and Local Income Tax Expense (Benefit) 12,158 4,862 12,704
Total tax provision (benefit), Amount $ 20,836 $ 17,680 $ 15,281