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Revenue and Accounts Receivable - Disaggregation of Revenue (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Investment Banking & Equities      
Disaggregation of Revenue [Line Items]      
Revenue from Contract with Customer $ 3,689,419 $ 2,811,717 $ 2,277,662
Investment Banking & Equities | Advisory Fees      
Disaggregation of Revenue [Line Items]      
Revenue from Contract with Customer 3,267,087 2,440,605 1,963,857
Investment Banking & Equities | Underwriting Fees      
Disaggregation of Revenue [Line Items]      
Revenue from Contract with Customer 179,647 157,067 111,016
Investment Banking & Equities | Commissions and Related Revenue      
Disaggregation of Revenue [Line Items]      
Revenue from Contract with Customer 242,685 214,045 202,789
Investment Management      
Disaggregation of Revenue [Line Items]      
Revenue from Contract with Customer 87,356 79,550 67,041
Investment Management | Wealth Management      
Disaggregation of Revenue [Line Items]      
Revenue from Contract with Customer $ 87,356 $ 79,550 $ 67,041