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STOCK-BASED COMPENSATION PLANS - Treatment of Equity Awards in Connection with the Merger (Details) - shares
shares in Thousands
Oct. 27, 2017
Oct. 24, 2017
Oct. 20, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Accelerated vesting (in shares)     300
Canceled vested unexervised stock options (in shares)   4,500  
RSAs      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Accelerated vesting (in shares) 1,100    
RSUs      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Accelerated vesting (in shares) 36    
PSAs      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Accelerated vesting (in shares)   98