STOCKHOLDERS' EQUITY AND SHARE-BASED COMPENSATION EXPENSE - At the Market Offering (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Nov. 18, 2014
Stockholders Equity And Share Based Compensation Expense [Abstract]
Average Share Price	$ 12.05
Common stock, par value (in dollars per share)		$ 0.01	$ 0.01
Aggregate amount of offer				$ 50,000
Stockholders' Equity, Commission Expense on Sale of Stock				3.00%
Stock Issued During Period, Shares, New Issues	3.8
Net Proceeds from Issuance of Common Stock	$ 44,700	$ 44,773