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Derivative Instruments and Hedging Activities Derivative Instruments and Hedging Activities - Hedge of Net Investment (Details)
€ in Thousands, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
USD ($)
Jun. 30, 2019
USD ($)
Jun. 30, 2020
USD ($)
Jun. 30, 2019
USD ($)
Jun. 30, 2020
EUR (€)
Jun. 30, 2019
EUR (€)
Derivative [Line Items]            
Foreign exchange losses (gains) associated with net investment hedge $ 6,854 $ 4,280 $ 401 $ (1,861)    
Net Investment Hedges            
Derivative [Line Items]            
Cumulative net gains 3,326   3,326      
Euro Notes | Net Investment Hedges | Designated as Hedging Instrument            
Derivative [Line Items]            
Hedged notes | €         € 300,000 € 274,161
Cumulative net gains $ 19,860   $ 19,860