INCOME TAXES - Components of provision for income taxes (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current provision:
Federal	$ 6,173	$ 8,623	$ 7,263
State	616	546	261
Deferred (benefit) provision:
Federal	384	1,511	(507)
State	(6)	8	(355)
Total income tax provision	$ 7,167	$ 10,688	$ 6,662

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

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