Quarterly report pursuant to Section 13 or 15(d)

(Issuance of Debt Narrative) (Details)

v3.20.2
(Issuance of Debt Narrative) (Details)
$ in Thousands
9 Months Ended
Sep. 30, 2020
USD ($)
May 31, 2020
USD ($)
Feb. 29, 2020
USD ($)
Debt Instrument [Line Items]      
Fees paid from proceeds of debt issuance and amendment of senior secured credit facility $ 35,500    
Cash available for general corporate purposes 1,600,000    
6.5% Convertible Senior Notes Due 2027      
Debt Instrument [Line Items]      
Face amount $ 1,200,000 $ 1,200,000  
Interest rate, stated percentage 6.50% 6.50%  
2.0% Convertible Senior Notes Due 2025 [Member]      
Debt Instrument [Line Items]      
Face amount $ 400,000   $ 400,000
Interest rate, stated percentage 2.00%   2.00%
Senior Secured Credit Facility [Member]      
Debt Instrument [Line Items]      
Debt Instrument Covenant Ratio Consolidated Liquidity $ 500,000    
Senior Secured Credit Facility [Member] | First Debt Covenant Period [Member]      
Debt Instrument [Line Items]      
Consolidated net leverage ratio 6.75    
Senior Secured Credit Facility [Member] | First Step Down Consolidated Net Leverage Ratio Reduced [Member]      
Debt Instrument [Line Items]      
Consolidated net leverage ratio 6.25    
Number of quarters to step down net leverage ratio 4    
Senior Secured Credit Facility [Member] | Second Step Down Period Consolidated Net Leverage Ratio Reduced [Member]      
Debt Instrument [Line Items]      
Consolidated net leverage ratio 5.75    
Number of quarters to step down net leverage ratio 8    
Senior Secured Credit Facility [Member] | Third Step Down Period Consolidated Net Leverage Ratio Reduced [Member]      
Debt Instrument [Line Items]      
Consolidated net leverage ratio 5.50    
Number of quarters to step down net leverage ratio 12    
Senior Secured Credit Facility [Member] | Fourth Step Down Period Consolidated Net Leverage Ratio Reduced [Member]      
Debt Instrument [Line Items]      
Consolidated net leverage ratio 5.25    
Number of quarters to step down net leverage ratio 14