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INCOME TAXES - Summary of Income Tax Expense (Benefit) (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Current expense:      
Federal $ 1,499 $ 844 $ 81
State (1) (7) 10
Current expense 1,498 837 91
Deferred expense (benefit):      
Federal (249) 779 2,723
State 17 18 18
Deferred expense (benefit) (232) 797 2,741
Change in valuation allowance on deferred taxes 0 0 (18,964)
Income tax expense (benefit) $ 1,266 $ 1,634 $ (16,132)