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Long-Term Debt (Details) - USD ($)
Sep. 30, 2016
Apr. 07, 2016
Dec. 31, 2015
Jul. 20, 2015
Apr. 01, 2015
Debt Instrument [Line Items]          
Sale leaseback financing obligation $ 118,604,000   $ 121,992,000    
Line of credit 958,236,000   450,000,000    
Capital lease obligation and notes payable 702,000   3,975,000    
Total debt 4,520,542,000   1,975,967,000    
Less: current maturities 5,010,000   5,084,000    
Less: debt issuance costs 42,102,000   18,352,000    
Long-term debt, net of current maturities 4,473,430,000   1,952,531,000    
Term Loan [Member]          
Debt Instrument [Line Items]          
Term Loan 1,243,000,000   0    
2014 Revolver [Member]          
Debt Instrument [Line Items]          
Line of credit 958,236,000   450,000,000    
6.375% Senior Notes Due 2023 [Member] | Senior Notes [Member]          
Debt Instrument [Line Items]          
Term Loan         $ 800,000,000.0
Senior notes $ 800,000,000   800,000,000    
Interest rate, stated percentage 6.375%       6.375%
5.500% Senior Notes Due 2020 [Member] | Senior Notes [Member]          
Debt Instrument [Line Items]          
Term Loan       $ 600,000,000.0  
Senior notes $ 600,000,000   600,000,000    
Interest rate, stated percentage 5.50%     5.50%  
6.250% Senior Notes Due 2021 [Member] | Senior Notes [Member]          
Debt Instrument [Line Items]          
Term Loan   $ 800,000,000.0      
Senior notes $ 800,000,000   $ 0    
Interest rate, stated percentage 6.25% 6.25%