GOODWILL AND INTANGIBLE ASSETS - Additional Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Dec. 31, 2016 USD ($)
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 33,589	$ 33,970	$ 33,589	$ 33,970	$ 33,589
Weighted average cost of capital (percent)	10.50%
Debt capital structure (percent)	35.00%
Equity capital structure (percent)	65.00%
Income analysis weight (percent)			50.00%
Market analysis weight (percent)			25.00%
Transaction analysis weight (percent)			25.00%
Amortization of intangible assets	$ 3,200	$ 3,200	$ 9,500	$ 9,500
Minimum
Finite-Lived Intangible Assets [Line Items]
EBITDA multiple for public company equity prices			8.25
EBITDA multiple for sales and purchase of comparable business			8.25
Maximum
Finite-Lived Intangible Assets [Line Items]
EBITDA multiple for public company equity prices			9.25
EBITDA multiple for sales and purchase of comparable business			9.25