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SHARE-BASED COMPENSATION Schedule of Share-Based Compensation Activity (Details)
shares in Thousands
9 Months Ended
Sep. 30, 2018
shares
Restricted stock units  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Granted 731
Vested 595
Performance share units  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Granted 344
Vested 112