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Income Taxes - Summary of Provision for Income Taxes from Continuing Operations (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Current:      
Federal $ 7,412 $ 5,080 $ 6,442
State 408 89 2,030
Current income tax expense 7,820 5,169 8,472
Deferred:      
Federal (824) 6,310 85
State (289) (2,271) (1,770)
Deferred income taxes (1,113) 4,039 (1,685)
Total provision $ 6,707 $ 9,208 $ 6,787