v3.26.1
SEGMENT DISCLOSURES - Summary of Segment Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Segment Reporting [Line Items]          
Revenue from external customers $ 682,206   $ 683,496 $ 1,530,785 $ 1,521,510
Corporate & other:          
General & administrative expenses 38,366 $ 41,511 27,637 79,877 55,707
Interest expense 24,335   27,867 48,251 53,023
Gain from acquisition related adjustment 0   0 (57,955) 0
Other income (expense), net (13,949)   (25,374) (9,933) (23,408)
Income before income tax expense 23,686 $ 214,529 57,779 238,215 230,689
Operating Segments          
Segment Reporting [Line Items]          
Revenue from external customers 682,206   683,496 1,530,785 1,521,510
Personnel costs 444,993   453,703 917,452 941,825
Facility costs 24,757   26,834 56,443 53,754
Other costs, gains, and losses, net 116,412   98,389 228,769 188,951
Total segment expense 586,162   578,926 1,202,664 1,184,530
Corporate & other:          
Income before income tax expense 96,044   104,570 328,121 336,980
Operating Segments | Financial Services          
Segment Reporting [Line Items]          
Revenue from external customers 580,324   581,567 1,320,654 1,306,605
Personnel costs 379,658   388,625 787,430 810,082
Facility costs 21,550   23,639 50,012 47,351
Other costs, gains, and losses, net 98,719   82,701 194,128 158,105
Total segment expense 499,927   494,965 1,031,570 1,015,538
Corporate & other:          
Income before income tax expense 80,397   86,602 289,084 291,067
Operating Segments | Benefits and Insurance Services          
Segment Reporting [Line Items]          
Revenue from external customers 101,882   101,929 210,131 214,905
Personnel costs 65,335   65,078 130,022 131,743
Facility costs 3,207   3,195 6,431 6,403
Other costs, gains, and losses, net 17,693   15,688 34,641 30,846
Total segment expense 86,235   83,961 171,094 168,992
Corporate & other:          
Income before income tax expense 15,647   17,968 39,037 45,913
Corporate And Eliminations          
Corporate & other:          
Unallocated corporate operating expenses 23,661   16,638 30,219 20,435
General & administrative expenses 38,366   27,637 79,877 55,707
Interest expense 24,308   27,867 48,224 53,023
Gain from acquisition related adjustment       (57,955)  
Other income (expense), net $ (13,977)   $ (25,351) $ (10,459) $ (22,874)