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Derivative Instruments and Hedging Activities - Net Investment Hedges (Details) - Net Investment Hedges € in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 EUR (€)	Dec. 31, 2019 USD ($)	Aug. 31, 2019 USD ($)	Aug. 31, 2019 EUR (€)
Derivative [Line Items]
Cumulative net gains	$ 1,956		$ 1,956
Cross-currency Swap Agreements
Derivative [Line Items]
Notional amount	$ 359,200		$ 359,200		€ 300,000		$ 110,000	€ 99,055
Interest rate	4.50%		4.50%		4.50%		6.00%	6.00%
Weighted average interest rate	3.40%		3.40%		3.40%		3.65%	3.65%
Unrealized losses (gains) associated with cross-currency swaps	$ 1,370	$ (1,972)	$ (2,938)	$ (1,972)
Cross-currency Swap Agreements \| Other Assets, Net
Derivative [Line Items]
Derivative asset	4,346		4,346
Cross-currency Swap Agreements \| Other Long-Term Liabilities
Derivative [Line Items]
Derivative liability	$ 2,390		$ 2,390			$ 982