v3.26.1
Revenue - Asset-based Revenue disaggregated by Product and Service (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Disaggregation of Revenue [Line Items]        
Asset Based Fees $ 835,144 $ 702,347 $ 1,655,949 $ 1,397,588
Client cash        
Disaggregation of Revenue [Line Items]        
Asset Based Fees 443,501 397,332 888,826 789,363
Sponsorship Programs [Member]        
Disaggregation of Revenue [Line Items]        
Asset Based Fees 235,519 171,715 459,168 342,253
Recordkeeping Revenues [Member]        
Disaggregation of Revenue [Line Items]        
Asset Based Fees $ 156,124 $ 133,300 $ 307,955 $ 265,972