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Derivatives and Hedging Activities (Remeasurement) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Net Investment Hedging      
Derivative [Line Items]      
Loss recorded in AOCL $ (34,973) $ (12,084) $ (17,164)