Annual report pursuant to Section 13 and 15(d)

Long-term Debt - Summary of Components of Senior Unsecured Notes (Details)

v3.20.4
Long-term Debt - Summary of Components of Senior Unsecured Notes (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Debt Instrument [Line Items]      
Interest expense $ 92,182 $ 64,241 $ 76,874
Senior Unsecured Notes      
Debt Instrument [Line Items]      
Principal 1,275,000 500,000  
Accrued interest 22,000 13,000  
Unamortized premium 2,000 7,000  
Less: Unamortized financing costs (16,000) (8,000)  
Carrying value of convertible notes 1,283,000 512,000  
Interest expense $ 49,000 $ 12,000