v3.26.3
Segment Information - Components of Segment Revenues, Other Segment Items and Segment Adjusted EBITDA (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Segment Reporting Information [Line Items]        
Segment Revenues $ 203,044 $ 224,888 $ 558,223 $ 637,265
Segment Adjusted EBITDA 46,798 47,131 120,730 133,286
Operating Segments        
Segment Reporting Information [Line Items]        
Segment Revenues 203,044 224,888 558,223 637,265
Segment Adjusted EBITDA 46,798 47,131 120,730 133,286
Consulting and Treatment | Operating Segments        
Segment Reporting Information [Line Items]        
Segment Revenues 141,984 161,930 382,168 452,482
Other Segment Items [1] 111,147 132,082 303,313 368,550
Segment Adjusted EBITDA 30,837 29,848 78,855 83,932
Measurement and Analysis | Operating Segments        
Segment Reporting Information [Line Items]        
Segment Revenues 61,060 62,958 176,055 184,783
Other Segment Items [1] 45,099 45,675 134,180 135,429
Segment Adjusted EBITDA $ 15,961 $ 17,283 $ 41,875 $ 49,354
[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 Income (Loss) to manage operations and is not regularly provided disaggregated Other Segment Items at the individual segment level.