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Debt - Senior Secured Credit Facilities (Detail)
 3 Months Ended 9 Months Ended
Jul. 18, 2016
USD ($)
Sep. 30, 2016
USD ($)
Sep. 30, 2015
USD ($)
Sep. 30, 2016
USD ($)
Sep. 30, 2015
USD ($)
Mar. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Line of Credit Facility [Line Items]              
Repayment of debt       $ 994,287,000 $ 719,507,000    
Loss on extinguishment of debt   $ 3,683,000 $ 0 3,683,000 $ 33,235,000    
Carrying amount of outstanding debt   3,429,000   3,429,000     $ 3,360,000,000
Debt issuance costs   29,000,000   29,000,000     30,000,000
Unamortized discount   6,000,000   6,000,000     6,000,000
Face value of outstanding debt   3,349,312,000   3,349,312,000     3,204,987,000
Outstanding letters of credit that will reduce overall credit capacity   36,000,000   36,000,000     25,000,000
Line of Credit [Member] | Second Amended and Restated Credit Agreement [Member]              
Line of Credit Facility [Line Items]              
Senior Secured Leverage Ratio, Less than 2.50            
Line of Credit [Member] | Term Loan [Member] | Second Amended and Restated Credit Agreement, Term Loan A [Member]              
Line of Credit Facility [Line Items]              
Credit facility amount $ 600,000,000            
Quarterly periodic payment, percentage of principal, first two years 1.25%            
Quarterly periodic payment, percentage of principal, next three years 2.50%            
Proceeds from line of credit $ 597,000,000            
Debt instrument discount 3,000,000            
Line of Credit [Member] | Revolving Credit Facility [Member]              
Line of Credit Facility [Line Items]              
Extinguishment of debt 120,000,000            
Payment of associated financing fees 11,000,000            
Line of Credit [Member] | Revolving Credit Facility [Member] | Second Amended and Restated Credit Agreement, New Revolver [Member]              
Line of Credit Facility [Line Items]              
Credit facility amount 400,000,000            
Line of Credit [Member] | Letter of Credit [Member] | Second Amended and Restated Credit Agreement, New Revolver [Member]              
Line of Credit Facility [Line Items]              
Credit facility amount 150,000,000            
Line of Credit [Member] | Term Loan B and Incremental Term Loan Facility [Member] | Term Loan B and Incremental Term Loan Facility [Member]              
Line of Credit Facility [Line Items]              
Repayment of debt $ 350,000,000            
Senior Secured Credit Facilities [Member] | Revolving Credit Facility [Member]              
Line of Credit Facility [Line Items]              
Face value of outstanding debt   0   0     0
Senior Secured Credit Facilities [Member] | Revolver L Plus Two Point Seven Five Percent Two Thousand Nineteen [Member]              
Line of Credit Facility [Line Items]              
Credit facility amount   370,000,000   370,000,000      
Face value of outstanding debt   0   0     0
Senior Secured Credit Facilities [Member] | Revolver L Plus Three Point Seven Five Percent Two Thousand Eighteen [Member]              
Line of Credit Facility [Line Items]              
Credit facility amount   35,000,000   35,000,000      
Face value of outstanding debt   $ 0   $ 0     $ 0
Senior Unsecured Notes [Member] | Senior Unsecured Notes Due 2016 [Member]              
Line of Credit Facility [Line Items]              
Face value of outstanding debt           $ 165,000,000  
Eurocurrency [Member] | Line of Credit [Member] | Second Amended and Restated Credit Agreement [Member]              
Line of Credit Facility [Line Items]              
Variable basis spread 2.50%            
Variable basis spread after step down 2.25%            
Base Rate [Member] | Line of Credit [Member] | Second Amended and Restated Credit Agreement [Member]              
Line of Credit Facility [Line Items]              
Variable basis spread 1.50%            
Variable basis spread after step down 1.25%