Derivative Instruments and Hedging Activities - Net Investment Hedges (Details) - Net Investment Hedges - Cross-currency swap agreements € in Thousands, $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2019 USD ($)	Sep. 30, 2019 USD ($)	Aug. 31, 2019 USD ($)	Aug. 31, 2019 EUR (€)
Derivative [Line Items]
Notional amount			$ 110,000	€ 99,055
Interest rate			6.00%	6.00%
Weighted average interest rate			3.65%	3.65%
Unrealized gains	$ 1,972	$ 1,972
Other Assets, Net
Derivative [Line Items]
Derivative asset	$ 1,972	$ 1,972

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Average fixed interest rate related to the group of interest rate derivatives.

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Fixed interest rate related to the interest rate derivative.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Nominal or face amount used to calculate payment on derivative.

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The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.

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