v3.26.1
Revenues (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Disaggregation of Revenue [Line Items]    
Revenues $ 199,535 $ 217,932
Investment management fees    
Disaggregation of Revenue [Line Items]    
Revenues 169,133 186,091
Open-end funds    
Disaggregation of Revenue [Line Items]    
Revenues 63,726 74,037
Closed-end funds    
Disaggregation of Revenue [Line Items]    
Revenues 20,790 14,853
Retail separate accounts    
Disaggregation of Revenue [Line Items]    
Revenues 47,318 54,272
Institutional accounts    
Disaggregation of Revenue [Line Items]    
Revenues $ 37,299 $ 42,929