Derivative Instruments - Designated as hedging, Financial Position (Details) - Net Investment Hedging [Member] - Cross Currency Interest Rate Contract [Member] - Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Other Assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives	$ 4,570	$ 0
Other long-term liabilities [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives	$ 0	$ 5,000