Quarterly report pursuant to Section 13 or 15(d)

Long-term Debt - Additional Information (Details)

v3.21.1
Long-term Debt - Additional Information (Details) - USD ($)
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Debt Instrument [Line Items]      
Maximum unencumbered assets percentage of unsecured debt 120.00%    
Total interest expense $ 27,582,000 $ 18,135,000  
Senior unsecured notes      
Debt Instrument [Line Items]      
Principal 1,275,000,000   $ 1,275,000,000
Senior unsecured notes | 2024 notes      
Debt Instrument [Line Items]      
Total interest expense 17,000,000 $ 7,000,000  
Principal $ 500,000,000    
Interest rate 5.25%    
Redemption price, percentage 40.00%    
Convertible senior notes | 2023 Convertible Senior Notes      
Debt Instrument [Line Items]      
Principal amount outstanding $ 294,000,000    
Principal $ 144,000,000    
Interest rate 0.00%    
Redemption price, percentage 100.00%    
Convertible senior notes | 2022 Convertible Senior Notes      
Debt Instrument [Line Items]      
Principal $ 150,000,000    
Interest rate 4.125%    
Redemption price, percentage 100.00%    
Convertible senior notes | 4.125% Convertible senior notes due september 1, 2022      
Debt Instrument [Line Items]      
Total interest expense $ 2,000,000    
Principal $ 294,000,000   $ 294,000,000