INCOME TAXES - Summary of Changes in Deferred Tax Asset Valuation Allowance (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Deferred Tax Assets, Valuation Allowance [Roll Forward]
Valuation allowance, beginning balance	$ 10,054	$ 9,409
Increase related to net operating losses and loan loss reserves	4,720	1,303
Other increase (decrease)	1,475	(658)
Decrease related to changes in tax rates	(3,845)
Valuation allowance, ending balance	$ 12,404	$ 10,054