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Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Revenue	$ 5,480,826	$ 2,797,288	$ 2,805,839
Top client
Disaggregation of Revenue [Line Items]
Revenue	441,173	337,904	350,287
Clients 2-5
Disaggregation of Revenue [Line Items]
Revenue	1,291,946	754,906	704,963
Clients 6-10
Disaggregation of Revenue [Line Items]
Revenue	752,325	350,865	347,832
Clients 11-25
Disaggregation of Revenue [Line Items]
Revenue	1,077,073	501,643	529,713
Other
Disaggregation of Revenue [Line Items]
Revenue	$ 1,918,309	$ 851,970	$ 873,044

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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