Segment Operating Results - Revenues Derived from Clients by Geographical Areas (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Net Revenues	$ 3,270,303	$ 2,292,553	$ 1,983,975
United States [Member]
Segment Reporting Information [Line Items]
Net Revenues	2,553,806	1,768,901	1,465,143
Europe And Other [Member]
Segment Reporting Information [Line Items]
Net Revenues	710,660	497,102	501,425
Latin America [Member]
Segment Reporting Information [Line Items]
Net Revenues	$ 5,837	$ 26,550	$ 17,407