STOCK-BASED COMPENSATION Deferred Compensation Arrangement (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Deferred Compensation Arrangement with Employees and Non Employees, Share Based Payments [Line Items]
Fair value of shares withheld for tax withholding obligations	$ 5,337	$ 2,844
Director [Member]
Deferred Compensation Arrangement with Employees and Non Employees, Share Based Payments [Line Items]
Vesting period	1 year
Deferred Compensation Arrangement with Individual, Shares Issued	29,167	23,750	20,000