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SHARE-BASED COMPENSATION Schedule of Share-Based Compensation Activity (Details)
shares in Thousands
6 Months Ended
Jun. 30, 2019
shares
Restricted stock units  
Share-based Compensation Arrangement by Share-based Payment Award  
Granted 952
Vested 630
Performance share units  
Share-based Compensation Arrangement by Share-based Payment Award  
Granted 421
Vested 153