COMMITMENTS AND CONTINGENCIES (Details) $ in Thousands			1 Months Ended	12 Months Ended
	Mar. 30, 2015 USD ($)	Jun. 24, 2013 facility entity	Apr. 30, 2015 USD ($) company	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Commitments and contingencies
Loss on legal settlement			$ 600	$ 0	$ 600
Number of Insurance Carriers To Pay the Settlement Amount | company			2
Other operating expenses				$ 2,394	$ 2,922
Ownership interest, percentage		5.00%
Number of entities controlled by related party against which complaint filed in the district court of oklahoma county | entity		5
Number of facilities owned by related party | facility		5
Litigation Settlement, Amount	$ 2,000