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Fair Value Measurements (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Senior Notes | 5.750% Notes    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Interest rate, stated percentage 5.75%  
Senior Notes | 5.50% Senior Secured Notes    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Interest rate, stated percentage 5.50%  
Carrying Amount    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Long-term debt instrument, value $ 4,933,097 $ 4,607,767
Carrying Amount | Term Loan G, net of discount | Term Loan G, net of discount    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Long-term debt instrument, value 0 2,337,169
Carrying Amount | Term Loan G, net of discount | Term Loan B, net of discount    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Long-term debt instrument, value 1,311,705 0
Carrying Amount | Senior Notes | 5.750% Notes    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Long-term debt instrument, value 1,300,000 1,300,000
Carrying Amount | Senior Notes | 5.50% Senior Secured Notes    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Long-term debt instrument, value 1,050,000 0
Carrying Amount | Convertible notes, net of discount | Convertible notes, net of discount    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Long-term debt instrument, value 1,271,297 970,506
Carrying Amount | Finance lease obligations    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Long-term debt instrument, value 95 92
Fair Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Long-term debt instrument, value 4,863,523 4,661,318
Fair Value | Term Loan G, net of discount | Term Loan G, net of discount    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Long-term debt instrument, value 0 2,390,720
Fair Value | Term Loan G, net of discount | Term Loan B, net of discount    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Long-term debt instrument, value 1,311,705 0
Fair Value | Senior Notes | 5.750% Notes    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Long-term debt instrument, value 1,249,894 1,300,000
Fair Value | Senior Notes | 5.50% Senior Secured Notes    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Long-term debt instrument, value 1,050,000 0
Fair Value | Convertible notes, net of discount | Convertible notes, net of discount    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Long-term debt instrument, value 1,251,829 970,506
Fair Value | Finance lease obligations    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Long-term debt instrument, value $ 95 $ 92