Operating Segments and Geographic Information - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Revenues	$ 3,566,324	$ 3,900,125	$ 3,646,342
Long-lived assets	$ 97,763	64,708
Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration]	Chief Executive Officer [Member]
Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description	Segment operating income is the measure utilized by the CODM to assess performance and allocate resources. When evaluating the Company’s financial performance, the CODM regularly reviews revenues, compensation and benefits, reimbursable expenses and other segment items. Compensation costs are key metrics reviewed by the CODM when allocating resources and assessing performance as the Company depends significantly on human capital to deliver services to its clients. Reimbursable expenses are also reviewed regularly by the CODM as revenue included in the CODM packages are net of these expenses.
UNITED STATES [Member]
Segment Reporting Information [Line Items]
Revenues	$ 3,100,000	3,200,000	$ 3,000,000
Long-lived assets	$ 97,100	$ 64,100