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Share Based Compensation - Additional Information (Details) - USD ($)
3 Months Ended 9 Months Ended
Apr. 12, 2017
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award          
Total cost of share based payment plans   $ 7,918,000 $ 1,264,000 $ 34,182,000 $ 3,967,000
Stock issued to employees       $ 26,673,000  
Performance Shares | Stock Incentive Plan 2017          
Share-based Compensation Arrangement by Share-based Payment Award          
Percent of equity reserved for directors, officers and other employees 7.50%        
Performance Shares | Management Incentive Plan          
Share-based Compensation Arrangement by Share-based Payment Award          
Percentage of reserve granted 40.00%        
Vesting description       Also on the Effective Date, 40% of the Reserve (“Initial MIP Grants”) was granted to members of the board of directors, officers, and other employees of the reorganized Company subject to the conditions and performance requirements provided in the grants, including the limitations that one-third of the Initial MIP Grants will vest, if at all, at such time when the total enterprise value of the Company equals or exceeds $6.0 billion based upon the volume weighted average price of the common stock during a consecutive 30-day period, that one-third of the Initial MIP Grants will vest, if at all, at such time when the total enterprise value of the Company equals or exceeds 110% of $6.0 billion based upon the volume weighted average price of the common stock during a consecutive 30-day period, and, that if any Initial MIP Grants do not vest before the fifth anniversary of the Effective Date, such Initial MIP Grants shall automatically expire.  
Performance Shares | Management Incentive Plan | Vest One-third Upon Reaching a Total Enterprise Value Equals or Exceeds $6.0 Billion          
Share-based Compensation Arrangement by Share-based Payment Award          
Vesting percentage 0.33%        
Total enterprise value $ 6,000,000,000        
Performance Shares | Management Incentive Plan | Vest One-third Upon Reaching a Total Enterprise Value Equals or Exceeds 110% of $6.0 Billion or $6.6 Billion          
Share-based Compensation Arrangement by Share-based Payment Award          
Vesting percentage 0.33%        
Total enterprise value $ 6,000,000,000        
Percentage of enterprise value 110.00%        
Stock-Based Compensation Cost          
Share-based Compensation Arrangement by Share-based Payment Award          
Payment or other distribution on account of the LTIPs $ 0        
Total cost of share based payment plans       $ 34,200,000 4,000,000
Stock-Based Compensation Cost | Management Incentive Plan          
Share-based Compensation Arrangement by Share-based Payment Award          
Total cost of share based payment plans       32,900,000  
Stock issued to employees       $ 26,100,000  
Numbers of shares issued to employees       1,238,665  
Stock-Based Compensation Cost | Management Incentive Plan | Vest One-third Upon Reaching a Total Enterprise Value Equals or Exceeds $6.0 Billion          
Share-based Compensation Arrangement by Share-based Payment Award          
Total enterprise value   6,000,000,000   $ 6,000,000,000  
Expected share-based compensation expense   22,100,000   22,100,000  
Stock-Based Compensation Cost | Management Incentive Plan | Vest One-third Upon Reaching a Total Enterprise Value Equals or Exceeds 110% of $6.0 Billion or $6.6 Billion          
Share-based Compensation Arrangement by Share-based Payment Award          
Total enterprise value   6,600,000,000   6,600,000,000  
Expected share-based compensation expense   $ 20,900,000   $ 20,900,000  
Stock-Based Compensation Cost | LTIP 2014 & 2015          
Share-based Compensation Arrangement by Share-based Payment Award          
Total cost of share based payment plans         $ 3,300,000