SHARE-BASED COMPENSATION - Equity Compensation Plan and RSU Acitivity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Restricted Stock Unit Activity [Abstract]
RSUs issued	795,693	685,000	361,000
RSUs forfeited	(57,498)
Net RSUs issued and increase (decrease) to paid-in capital	738,000	638,000	97,000
RSUs vested and released	406,463	410,000	547,000
RSUs issued, Amount	$ 9,045	$ 5,754	$ 2,906
Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures To Paid In Capital	$ 8,336	$ 5,027	$ 111
Equity Compensation Plan [Abstract]
Additional shares available for grant during the next period	1,500,000
Shares available for grant	2,500,000