v3.26.1
Segment Information - Components of Segment Revenues, Other Segment Items and Segment Adjusted EBITDA (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Segment Reporting Information [Line Items]        
Segment Revenues $ 186,661 $ 234,543 $ 355,179 $ 412,377
Segment Adjusted EBITDA 43,862 55,883 73,932 86,155
Operating Segments        
Segment Reporting Information [Line Items]        
Segment Revenues 186,661 234,543 355,179 412,377
Segment Adjusted EBITDA 43,862 55,883 73,932 86,155
Consulting and Treatment | Operating Segments        
Segment Reporting Information [Line Items]        
Segment Revenues 125,597 171,748 240,184 290,552
Other Segment Items [1] 97,712 134,163 192,166 236,468
Segment Adjusted EBITDA 27,885 37,585 48,018 54,084
Measurement and Analysis | Operating Segments        
Segment Reporting Information [Line Items]        
Segment Revenues 61,064 62,795 114,995 121,825
Other Segment Items [1] 45,087 44,497 89,081 89,754
Segment Adjusted EBITDA $ 15,977 $ 18,298 $ 25,914 $ 32,071
[1] Other Segment Items for each reportable segment represents the difference between Segment Revenues and Segment Adjusted EBITDA and primarily includes cost of revenues, selling, general and administrative expense, and other income (expense), net. The CODM uses consolidated expense information as presented in the Consolidated Statement of Operations and Comprehensive Loss to manage operations and is not regularly provided disaggregated Other Segment Items at the individual segment level.