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Derivative Instruments (Schedule of Derivative Instruments Designated as Hedges of a Net Investment in a Foreign Operation) (Details) - Foreign Exchange Forward - Designated as Hedging Instrument - Net Investment Hedging - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Weighted average of U.S. dollar equivalent of foreign denominated net assets $ (45,803) $ 81,264
Derivative gains $ 11,685 $ 959