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INCOME TAXES - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Income Tax Disclosure [Abstract]        
Effective tax rate (21.10%) 26.90% 13.20% (1.10%)
Income tax (expense) benefit $ (6,467) $ (38,761) $ 5,994 $ 1,246