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Income Taxes - Components of Provision (Benefit) for Income Taxes (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Current:    
Federal $ (4,742) $ 4,522
State (146) 262
Total current (4,888) 4,784
Deferred:    
Federal 7,620 (13,226)
State 246 689
Total deferred 7,866 (12,537)
Total income tax provision (benefit) $ 2,978 $ (7,753)