Derivatives and Hedging Activities - Cash Flow Hedges (Details) - Cash flow hedges - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of gain or (loss) recognized in accumulated other comprehensive income:	$ (42,551)	$ 19,461	$ (62,079)	$ 26,422
Amount of gain or (loss) reclassified from accumulated other comprehensive income to income:	222	13,369	20,759	26,840
Amount of gain or (loss) excluded from effectiveness testing included in income:	(430)	(538)	(1,454)	(467)
Foreign currency forward and option contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of gain or (loss) recognized in accumulated other comprehensive income:	(40,770)	20,979	(35,092)	29,345
Foreign currency option
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Foreign currency option contracts (excluded component)	639	(1,518)	2,315	(2,923)
Foreign currency option | Revenues
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of gain or (loss) excluded from effectiveness testing included in income:	(430)	(538)	(1,454)	(555)
Interest rate locks
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of gain or (loss) recognized in accumulated other comprehensive income:	(2,420)	0	(29,302)	0
Interest rate locks | Interest Expense
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of gain or (loss) reclassified from accumulated other comprehensive income to income:	(731)	0	(473)	0
Foreign Exchange Forward | Revenues
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of gain or (loss) reclassified from accumulated other comprehensive income to income:	2,904	27,843	44,681	56,388
Foreign Exchange Forward | Costs and operating expenses
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of gain or (loss) reclassified from accumulated other comprehensive income to income:	(1,951)	(14,474)	(23,449)	(29,548)
Foreign Exchange Forward | Other income (expense)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Amount of gain or (loss) excluded from effectiveness testing included in income:	$ 0	$ 0	$ 0	$ 88