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Debt - Debt Refinancing and Senior Notes Due 2019 Exchange Transaction (Details) - USD ($)
$ / shares in Units, shares in Thousands
3 Months Ended 6 Months Ended
Aug. 11, 2017
Aug. 09, 2017
Jul. 01, 2017
Apr. 26, 2017
Apr. 21, 2017
Mar. 01, 2017
Jun. 30, 2017
Jun. 30, 2017
Jun. 30, 2016
Feb. 06, 2017
Dec. 31, 2016
Debt Instrument [Line Items]                      
Debt outstanding             $ 3,616,070,000 $ 3,616,070,000     $ 3,853,012,000
Repurchase payments of long term debt               2,415,530,000 $ 477,008,000    
IPO | Class A Common Stock                      
Debt Instrument [Line Items]                      
Sale of common stock in IPO (in dollars per share)                   $ 14.00  
Scenario, Forecast | Class A Common Stock                      
Debt Instrument [Line Items]                      
Required amount of proceeds received in public offering for exchange agreement to occur     $ 400,000,000                
Gross proceeds from initial public offering, percent of equity value     10.00%                
Scenario, Forecast | IPO | Class A Common Stock                      
Debt Instrument [Line Items]                      
Sale of common stock in IPO (in dollars per share) $ 14.00                    
Second Amended and Restated Credit Agreement | Revolving Credit Facility                      
Debt Instrument [Line Items]                      
Borrowing under credit facility             0 0      
Second Amended and Restated Credit Agreement | Letter of Credit                      
Debt Instrument [Line Items]                      
Maximum borrowing capacity under credit facility       $ 141,000,000              
Second Amended and Restated Credit Agreement | Revolving Credit Facility and Term Loan                      
Debt Instrument [Line Items]                      
Incremental borrowing capacity       $ 300,000,000              
Debt to consolidated EBITDA ratio       275.00%              
Senior Notes                      
Debt Instrument [Line Items]                      
Debt outstanding             $ 1,048,662,000 $ 1,048,662,000     1,388,036,000
Senior Notes | Senior Notes Due 2019                      
Debt Instrument [Line Items]                      
Interest rate             9.25% 9.25%      
Repurchase price, percent               104.625%      
Debt outstanding             $ 1,125,443,000 $ 1,125,443,000      
Redemption price               1,177,495,000      
Repurchase of aggregate principal amount           $ 22,556,000          
Repurchase payments of long term debt           $ 23,599,000          
Senior Notes | Senior Notes Due 2019 | Scenario, Forecast                      
Debt Instrument [Line Items]                      
Amount of debt to be exchanged     $ 250,000,000                
Principal amount redeemed   $ 1,205,630,000                  
Shares converted (in shares) 18,683                    
Common stock shares issuable, percentage of aggregate principal amount 104.625%                    
Amount to be divided by initial public offering price per share, to determine number of shares authorized for exchange $ 261,600,000                    
Period for repurchase of additional principal amount     60 days                
Amount able to be purchased after IPO     $ 62,500,000                
Senior Notes | The Senior Notes due 2025                      
Debt Instrument [Line Items]                      
Debt outstanding             800,000,000 800,000,000      
Senior Notes | The Senior Notes due 2025 | Debt Instrument, Redemption, Period One                      
Debt Instrument [Line Items]                      
Interest rate       8.25%              
Repurchase price, percent       106.188%              
Senior Notes | The Senior Notes due 2025 | Debt Instrument, Redemption, Period Two                      
Debt Instrument [Line Items]                      
Repurchase price, percent       100.00%              
Senior Notes | The Senior Notes due 2025 | Debt Instrument, Redemption, Period Three                      
Debt Instrument [Line Items]                      
Repurchase price, percent       108.25%              
Percentage of principal amount redeemed       40.00%              
Senior Notes | The Senior Notes due 2025 | Debt Instrument, Redemption, Period Four                      
Debt Instrument [Line Items]                      
Repurchase price, percent       100.00%              
Convertible Debt | Exchanged Notes                      
Debt Instrument [Line Items]                      
Amount of debt to be exchanged         $ 250,000,000            
Debt outstanding             248,662,000 248,662,000      
Debt issuance costs             70,800,000 70,800,000      
Write off of deferred debt issuance costs             (6,915,000)        
Lines of credit                      
Debt Instrument [Line Items]                      
Debt outstanding             $ 65,971,000 65,971,000     $ 66,081,000
Lines of credit | New Credit Agreement | Revolving Credit Facility                      
Debt Instrument [Line Items]                      
Maximum borrowing capacity under credit facility       $ 385,000,000              
Lines of credit | New Credit Facilities | Term Loan                      
Debt Instrument [Line Items]                      
Maximum borrowing capacity under credit facility       $ 1,600,000,000              
Lines of credit | Senior Secured Credit Facility | Term Loan                      
Debt Instrument [Line Items]                      
Amount of debt converted               $ 283,000,000      
Lines of credit | Second Amended and Restated Credit Agreement | Revolving Credit Facility | London Interbank Offered Rate (LIBOR)                      
Debt Instrument [Line Items]                      
Basis spread on variable rate       3.50%              
Lines of credit | Second Amended and Restated Credit Agreement | Revolving Credit Facility | Alternate Base Rate (ABR)                      
Debt Instrument [Line Items]                      
Basis spread on variable rate       2.50%              
Lines of credit | Second Amended and Restated Credit Agreement | Revolving Credit Facility | Maximum                      
Debt Instrument [Line Items]                      
Basis spread on variable rate       3.75%              
Lines of credit | Second Amended and Restated Credit Agreement | Revolving Credit Facility | Minimum                      
Debt Instrument [Line Items]                      
Basis spread on variable rate       2.75%              
Lines of credit | Second Amended and Restated Credit Agreement | Term Loan                      
Debt Instrument [Line Items]                      
Percentage of discount rate       1.00%              
Debt issuance costs       $ 16,000,000              
Percentage of amortization of debt discount       1.00%              
Lines of credit | Second Amended and Restated Credit Agreement | Term Loan | Debt Instrument, Covenant, Period One                      
Debt Instrument [Line Items]                      
Percentage of principal amount outstanding prepayment       101.00%              
Lines of credit | Second Amended and Restated Credit Agreement | Term Loan | Debt Instrument, Covenant, Period Two                      
Debt Instrument [Line Items]                      
Percentage of principal amount outstanding prepayment       100.00%              
Lines of credit | Second Amended and Restated Credit Agreement | Term Loan | London Interbank Offered Rate (LIBOR)                      
Debt Instrument [Line Items]                      
Total interest rate             5.73% 5.73%      
Lines of credit | Second Amended and Restated Credit Agreement | Term Loan | Maximum                      
Debt Instrument [Line Items]                      
Basis spread on variable rate       4.50%              
Lines of credit | Second Amended and Restated Credit Agreement | Term Loan | Minimum                      
Debt Instrument [Line Items]                      
Basis spread on variable rate       3.50%              
Lines of credit | Second Amended and Restated Credit Agreement | Term Loan | Minimum | London Interbank Offered Rate (LIBOR)                      
Debt Instrument [Line Items]                      
Basis spread on variable rate       4.25%              
Lines of credit | Second Amended and Restated Credit Agreement | Term Loan | Minimum | Alternate Base Rate (ABR)                      
Debt Instrument [Line Items]                      
Basis spread on variable rate       3.25%              
General and Administrative Expense | Convertible Debt | Exchanged Notes                      
Debt Instrument [Line Items]                      
Loss on modification of debt             $ 22,800,000