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EMPLOYEE BENEFIT PLAN (Details) - USD ($) $ in Thousands	12 Months Ended
EMPLOYEE BENEFIT PLAN (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Employee benefit plan disclosures
Eligibility criteria for participation in the Plan	21 years
Expense portion of fair value of stock	$ 183	$ 208	$ 201
Common Stock
Employee benefit plan disclosures
Issuance of common stock to 401(k) plan (in shares)	98,319	37,528	17,437
Expense portion of fair value of stock	$ 183	$ 208	$ 201