Quarterly report pursuant to Section 13 or 15(d)

Debt - (Summary of Debt) (Details)

v3.19.2
Debt - (Summary of Debt) (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Debt Instrument [Line Items]    
Outstanding Principal $ 2,873,464  
Deferred financing costs (6,854) $ (2,267)
Total debt 2,972,969 2,886,034
Debt classified as current (included in other current liabilities) (901,856) (900,759)
Total long-term debt 2,071,113 1,985,275
Margin Loan Facility    
Debt Instrument [Line Items]    
Outstanding Principal 900,000  
Carrying Value 900,000 900,000
Exchangeable senior debentures    
Debt Instrument [Line Items]    
Outstanding Principal 477,250  
Carrying Value 560,769 462,336
Senior notes    
Debt Instrument [Line Items]    
Outstanding Principal 775,000  
Carrying Value 797,840 803,287
Senior credit facility    
Debt Instrument [Line Items]    
Outstanding Principal 713,895  
Carrying Value 713,895 715,124
Wells Fargo note payable    
Debt Instrument [Line Items]    
Outstanding Principal 7,319  
Carrying Value $ 7,319 $ 7,554