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Derivative Instruments and Hedging Activities - Hedge of Net Investment (Details) (Details) - Euro Notes - Designated Hedging Instruments - Net Investment Hedging € in Thousands, $ in Thousands | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2019 USD ($) | Dec. 31, 2019 EUR (€) | Dec. 31, 2018 EUR (€) | Dec. 31, 2017 EUR (€)
Derivative [Line Items] |  |  |  |
Hedged notes | € |  | € 284,986 | € 224,424 | € 103,682
Cumulative net gains | $ | $ 20,261 |  |  |

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