Net revenues - Schedule of Net Revenues Disaggregated by Customer (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Segment Reporting Information [Line Items]
Net revenues	$ 1,296,072	$ 1,214,926
Advanced Technology Solutions
Segment Reporting Information [Line Items]
Net revenues	345,229	277,627
Core Business Services
Segment Reporting Information [Line Items]
Net revenues	$ 950,843	$ 937,299

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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+ Details