FAIR VALUE MEASUREMENTS - Financial Instrument that were not Measured at Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Fair Value, Option, Quantitative Disclosures [Line Items]
Financial Liabilities, Carrying Amount	$ 83,796	$ 93,125
Term Loan, Net [Member] | Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Financial Liabilities, Carrying Amount	90,586	99,134
Term Loan, Net [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Financial Liabilities, Fair Value	$ 94,000	$ 100,500