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NET DEFERRED TAX ASSET AND INCOME TAXES - Components of income tax provision (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Deferred expense (benefit) $ 888 $ 957 $ 945
Income tax provision 2,914 2,589 3,563
Components of income tax provision      
Federal 1,831 1,344 2,186
State 195 288 432
Current provision 2,026 1,632 2,618
Federal 840 852 896
State 48 105 49
Deferred expense (benefit) 888 957 945
Income tax provision $ 2,914 $ 2,589 $ 3,563