INCOME TAXES - Income Before Income Taxes (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
(Loss) income before income taxes $ (25,519) $ (10,511)
U.S.    
(Loss) income before income taxes (50,154) (6,159)
Foreign    
(Loss) income before income taxes $ 24,635 $ (4,352)