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SHARE-BASED AWARDS AND OPTIONS - Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
7 Months Ended 12 Months Ended
Dec. 31, 2016
Dec. 31, 2017
May 31, 2016
May 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense $ 18,707 $ 39,095 $ 30,809 $ 21,056
Total unrecognized compensation cost   $ 3,400    
Employee Stock Option        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Fair market value, percentage   100.00%    
Stock option term   10 years    
Share-based compensation expense $ 1,100 $ 2,600 $ 1,400 $ 700
Total unrecognized compensation cost, weighted average period (in years)   1 year 9 months    
Stock Option Plan 2011        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Weighted average grant date fair value (in dollars per share) $ 21.87 $ 23.68 $ 15.60 $ 8.45
Granted Before Fiscal 2015 | Employee Stock Option        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period       4 years
Granted Fiscal 2015 | Employee Stock Option        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period   3 years