v3.26.3
Revenue Recognition (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Disaggregation of Revenue [Line Items]        
Revenue subject to contracts with customers $ 1,219,213 $ 1,118,224 $ 3,511,979 $ 3,278,080
Not subject to contracts with customers:        
Dividend and interest income, net of broker-dealer related interest expense 17,171 20,741 51,325 58,049
Investment (losses) gains (11,454) (2,721) 33,110 (31,084)
Other revenues 635 903 1,881 1,616
Total revenue not from contract with customer 6,352 18,923 86,316 28,581
Net revenues 1,225,565 1,137,147 3,598,295 3,306,661
Base fees        
Disaggregation of Revenue [Line Items]        
Revenue subject to contracts with customers 868,548 852,478 2,578,032 2,475,663
Performance-based fees        
Disaggregation of Revenue [Line Items]        
Revenue subject to contracts with customers 121,422 21,972 234,098 97,877
All-in-management fees        
Disaggregation of Revenue [Line Items]        
Revenue subject to contracts with customers 88,546 90,754 269,241 266,124
12b-1 fees        
Disaggregation of Revenue [Line Items]        
Revenue subject to contracts with customers 14,583 16,008 44,121 47,508
Other distribution fees        
Disaggregation of Revenue [Line Items]        
Revenue subject to contracts with customers 94,151 103,662 287,655 294,179
Shareholder servicing fees        
Disaggregation of Revenue [Line Items]        
Revenue subject to contracts with customers 22,655 21,176 70,595 59,096
JV related revenues        
Disaggregation of Revenue [Line Items]        
Revenue subject to contracts with customers 6,055 9,242 19,044 27,589
Other        
Disaggregation of Revenue [Line Items]        
Revenue subject to contracts with customers $ 3,253 $ 2,932 $ 9,193 $ 10,044