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SHARE-BASED AWARDS AND OPTIONS - Narrative (Details)
$ / shares in Units, $ in Thousands
7 Months Ended 12 Months Ended
Dec. 31, 2016
USD ($)
$ / shares
Dec. 31, 2018
USD ($)
$ / shares
Dec. 31, 2017
USD ($)
$ / shares
May 31, 2016
USD ($)
$ / shares
May 31, 2015
May 31, 2011
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based compensation expense $ 18,707 $ 57,826 $ 39,095 $ 30,809    
Total unrecognized compensation cost of stock options   $ 3,300        
Restricted Stock and Restricted Stock Units            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award vesting period   3 years        
Restricted Stock Units            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award vesting period   28 months        
Leveraged Performance Units            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award performance period   3 years     3 years  
Restricted Stock            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Total fair value of share awards vested in period 20,000 $ 43,400 33,700 17,400    
Share-based compensation expense 17,200 53,200 35,200 28,800    
Total unrecognized compensation cost of restricted stock and performance awards   $ 62,700        
Weighted average period of unrecognized compensation cost   2 years        
Employee Stock Option            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based compensation expense $ 1,100 $ 2,700 $ 2,600 $ 1,400    
Weighted average period of unrecognized compensation cost   1 year 9 months        
Fair market value (as a percent)   100.00%        
Stock option term   10 years        
Stock Option Plan 2011            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock reserved for future issuance (shares) | shares           14,000,000
Weighted average grant date fair value (USD per share) | $ / shares $ 21.87 $ 35.09 $ 23.68 $ 15.60    
Granted Fiscal 2015 | Employee Stock Option            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting period   3 years        
Year One | Leveraged Performance Units            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting rate of performance units (as a percent)   33.33%        
Year Two | Leveraged Performance Units            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting rate of performance units (as a percent)   33.33%        
Year Three | Leveraged Performance Units            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting rate of performance units (as a percent)   33.33%        
Maximum | Leveraged Performance Units            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Payout ratio of awards   4        
Minimum | Leveraged Performance Units            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Payout ratio of awards   0