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Debt - Schedule of Debt (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Dec. 13, 2016
Aug. 19, 2016
May 27, 2016
Debt Instrument [Line Items]          
Revolving Credit Agreement $ 0 $ 0      
Capital leases(1) 0 4,202      
Total debt 2,200,000 2,204,202      
Debt issuance costs on senior unsecured notes (19,448) (22,918)      
Premium on senior unsecured notes 2,280 2,796      
Less: current portion 0 (2,413)      
Total long-term debt $ 2,182,832 2,181,667      
6.250% senior unsecured notes due 2024          
Debt Instrument [Line Items]          
Stated interest rate 6.25%        
5.375% senior unsecured notes due 2025          
Debt Instrument [Line Items]          
Stated interest rate 5.375%        
5.250% senior unsecured notes due 2025          
Debt Instrument [Line Items]          
Stated interest rate 5.25%        
5.625% senior unsecured notes due 2027          
Debt Instrument [Line Items]          
Stated interest rate 5.625%        
Senior Notes | 6.250% senior unsecured notes due 2024          
Debt Instrument [Line Items]          
Senior unsecured notes $ 400,000 400,000      
Premium on senior unsecured notes       $ 4,000  
Stated interest rate 6.25%     6.25% 6.25%
Senior Notes | 5.375% senior unsecured notes due 2025          
Debt Instrument [Line Items]          
Senior unsecured notes $ 650,000 650,000      
Stated interest rate 5.375%   5.375%    
Senior Notes | 5.250% senior unsecured notes due 2025          
Debt Instrument [Line Items]          
Senior unsecured notes $ 450,000 450,000      
Stated interest rate 5.25%        
Senior Notes | 5.625% senior unsecured notes due 2027          
Debt Instrument [Line Items]          
Senior unsecured notes $ 700,000 $ 700,000      
Stated interest rate 5.625%