Quarterly report pursuant to Section 13 or 15(d)

Debt (Summary of Debt) (Details)

v3.20.2
Debt (Summary of Debt) (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Debt Instrument [Line Items]    
Debt issued $ 3,070,459  
Deferred financing costs (7,197) $ (8,491)
Total debt 3,266,383 3,266,218
Debt classified as current (664,087) (3,008)
Long-term debt 2,602,296 3,263,210
Margin Loan Facility    
Debt Instrument [Line Items]    
Debt issued 1,300,000  
Carrying value 1,300,000 1,300,000
Exchangeable senior debentures    
Debt Instrument [Line Items]    
Debt issued 477,250  
Carrying value 660,963 658,839
Senior notes    
Debt Instrument [Line Items]    
Debt issued 775,000  
Carrying value 794,408 796,138
Senior credit facility    
Debt Instrument [Line Items]    
Debt issued 511,436  
Carrying value 511,436 512,666
Wells Fargo note payable    
Debt Instrument [Line Items]    
Debt issued 6,773  
Carrying value $ 6,773 $ 7,066