Annual report pursuant to Section 13 and 15(d)

Assets and Liabilities Measured at Fair Value - Schedule of Realized and Unrealized Gains (Losses) (Details)

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Assets and Liabilities Measured at Fair Value - Schedule of Realized and Unrealized Gains (Losses) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Realized and unrealized gains (losses) on financial instruments, net (note 6) $ (83,070) $ 1,170 $ 3,659
Indemnification Obligation      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Realized and unrealized gains (losses) on financial instruments, net (note 6) (8,502)    
Exchangeable senior debentures      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Realized and unrealized gains (losses) on financial instruments, net (note 6) $ (74,568)    
Other      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Realized and unrealized gains (losses) on financial instruments, net (note 6)   $ 1,170 $ 3,659