EMPLOYEE BENEFIT PLANS (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
EMPLOYEE BENEFIT PLANS
Minimum age required to be eligible to participate in the 401(k) plan			21 years
Expenses accrued relating to employer matching contributions	$ 490	$ 468	$ 1,006	$ 974