Quarterly report pursuant to Section 13 or 15(d)

Derivative Financial Instruments - Additional Information (Details)

v3.20.2
Derivative Financial Instruments - Additional Information (Details) - Not Designated as Hedging Instruments - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Derivative [Line Items]          
Outstanding forward contracts and mandatory sell commitments $ 855,200   $ 855,200   $ 427,700
Closed hedge instruments not yet settled 454,200   454,200   $ 376,500
Credit losses due to nonperformance of counterparties $ 0 $ 0 $ 0 $ 0