v3.26.1
Business Changes and Developments (Details)
£ in Thousands, shares in Thousands, $ in Thousands
3 Months Ended 6 Months Ended
Oct. 01, 2025
GBP (£)
shares
Oct. 01, 2025
USD ($)
shares
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
GBP (£)
Jun. 30, 2026
USD ($)
Dec. 31, 2025
USD ($)
Business Combination [Line Items]                  
Acquisition and Transition Costs     $ 0 $ 1,637 $ 1,800 $ 1,637      
Investment Banking & Equities                  
Business Combination [Line Items]                  
Amortization of Intangible Assets     3,712   7,442        
Acquisition and Transition Costs     0 $ 1,637 1,800 $ 1,637      
Robey Warshaw                  
Business Combination [Line Items]                  
Business Combination, Consideration Transferred, Cash   $ 5,345              
Consideration transferable on first anniversary             £ 74,813 $ 99,202  
Business Combination, Contingent Consideration, Change in Contingent Consideration, Liability, Increase (Decrease)     $ 1,613   $ 2,816        
Robey Warshaw | Acquisition-related Awards                  
Business Combination [Line Items]                  
Repayment period         4 years        
Robey Warshaw | Payable to Employees and Related Parties                  
Business Combination [Line Items]                  
Consideration transferable on first anniversary               97,805 $ 96,538
Robey Warshaw | Other Noncurrent Liabilities                  
Business Combination [Line Items]                  
Business Combination, Contingent Consideration, Liability, Noncurrent               $ 26,935 $ 24,521
Robey Warshaw | First Anniversary Of Closing                  
Business Combination [Line Items]                  
Business combination, consideration transferred, period due         1 year        
Robey Warshaw | Sixth Anniversary Of Closing                  
Business Combination [Line Items]                  
Business combination, consideration transferred, period due         6 years        
Robey Warshaw | Class A                  
Business Combination [Line Items]                  
Consideration £ 71,250 $ 95,767              
Shares Issued as Consideration for Acquisitions | shares 275 275              
Robey Warshaw | Class A | Acquisition-related Awards                  
Business Combination [Line Items]                  
Consideration Subject to Repayment £ 62,700 $ 84,275