v3.25.2
SEGMENT DISCLOSURES - Summary of Segment Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Segment Reporting Information [Line Items]        
Revenue $ 683,496 $ 420,012 $ 1,521,510 $ 914,309
Corporate & other:        
General & administrative expenses 27,637 22,050 55,707 40,761
Interest expense 27,867 5,884 53,023 10,395
Other income, net (25,374) (2,483) (23,408) (11,907)
Income before income tax expense 57,779 28,193 230,689 132,207
Operating Segments        
Segment Reporting Information [Line Items]        
Revenue 683,496 420,012 1,521,510 914,309
Personnel costs 453,703 289,844 941,825 583,604
Facility costs 26,834 14,634 53,754 30,214
Other costs, gains, and losses, net 98,389 53,435 188,951 105,096
Total segment expense 578,926 357,913 1,184,530 718,914
Corporate & other:        
Income before income tax expense 104,570 62,099 336,980 195,395
Operating Segments | Financial Services        
Segment Reporting Information [Line Items]        
Revenue 569,819 309,233 1,283,480 681,863
Personnel costs 378,268 212,988 789,570 429,603
Facility costs 23,636 11,510 47,346 23,845
Other costs, gains, and losses, net 82,580 38,183 157,876 74,708
Total segment expense 484,484 262,681 994,792 528,156
Corporate & other:        
Income before income tax expense 85,335 46,552 288,688 153,707
Operating Segments | Benefits and Insurance Services        
Segment Reporting Information [Line Items]        
Revenue 101,929 97,419 214,905 205,827
Personnel costs 65,078 65,435 131,743 131,158
Facility costs 3,195 3,062 6,403 6,244
Other costs, gains, and losses, net 15,688 14,703 30,846 29,391
Total segment expense 83,961 83,200 168,992 166,793
Corporate & other:        
Income before income tax expense 17,968 14,219 45,913 39,034
Operating Segments | National Practices        
Segment Reporting Information [Line Items]        
Revenue 11,748 13,360 23,125 26,619
Personnel costs 10,357 11,421 20,512 22,843
Facility costs 3 62 5 125
Other costs, gains, and losses, net 121 549 229 997
Total segment expense 10,481 12,032 20,746 23,965
Corporate & other:        
Income before income tax expense 1,267 1,328 2,379 2,654
Corporate And Eliminations        
Corporate & other:        
Unallocated corporate operating expenses 16,638 8,288 20,435 23,642
General & administrative expenses 27,637 22,050 55,707 40,761
Interest expense 27,867 5,884 53,023 10,395
Other income, net $ (25,351) $ (2,316) $ (22,874) $ (11,610)