Segment Operating Results - Revenues Derived from Clients by Geographical Areas (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting Information [Line Items]
Net Revenues	$ 675,770	$ 497,288	$ 1,335,420	$ 945,283
United States [Member]
Segment Reporting Information [Line Items]
Net Revenues	528,322	391,977	988,970	757,377
Europe And Other [Member]
Segment Reporting Information [Line Items]
Net Revenues	145,117	100,224	343,731	180,245
Latin America [Member]
Segment Reporting Information [Line Items]
Net Revenues	$ 2,331	$ 5,087	$ 2,719	$ 7,661