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Derivative Instruments and Hedging Activities - Cross-Currency Swap Agreements Designated as a Hedge of Net Investment (Details) - Net Investment Hedging - Cross-currency swap agreements
Sep. 30, 2020
USD ($)
Sep. 30, 2020
EUR (€)
Aug. 31, 2019
USD ($)
Aug. 31, 2019
EUR (€)
Derivative [Line Items]        
Notional amount $ 359,200,000 € 300,000,000 $ 110,000,000 € 99,055,000
Interest rate 4.50% 4.50% 6.00% 6.00%
Weighted average interest rate 3.40% 3.40% 3.65% 3.65%