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Derivatives and Hedging Activities - Derivatives Not Designated as Hedging Instruments (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Derivatives not designated as hedging instruments, gain (loss) $ 8,346 $ (113,456) $ 65,428 $ 19,917
Embedded derivatives | Revenues        
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Derivatives not designated as hedging instruments, gain (loss) 650 (2,741) 5,145 4,710
Economic hedge of embedded derivatives | Revenues        
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Derivatives not designated as hedging instruments, gain (loss) (279) 2,301 (4,492) (5,601)
Foreign currency forward contracts | Other income (expense)        
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Derivatives not designated as hedging instruments, gain (loss) $ 7,975 $ (113,016) $ 64,775 $ 20,808