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BASIS OF PRESENTATION (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
New accounting pronouncements        
Income tax benefits $ (8,864) $ (8,540) $ (12,903) $ (14,627)
ASU 2016-09        
New accounting pronouncements        
Income tax benefits     $ 656