Quarterly report [Sections 13 or 15(d)]

Mergers and Acquisitions - Estimated Fair Values of the Material Aggregate Assets and Liabilities Acquired (Details)

v3.25.3
Mergers and Acquisitions - Estimated Fair Values of the Material Aggregate Assets and Liabilities Acquired (Details) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2025
Jul. 01, 2025
May 16, 2025
May 01, 2025
Feb. 03, 2025
Dec. 31, 2024
Business Combination [Line Items]            
Goodwill $ 3,129,889         $ 2,646,676
2025 Acquisitions            
Business Combination [Line Items]            
Cash and cash equivalents 18,148          
Commissions and fees receivable – net 41,392          
Fiduciary cash and receivables 143,699          
Goodwill 450,590          
Property and equipment – net 494          
Lease right-of-use assets 4,674          
Other current and non-current assets 3,355          
Total assets acquired 962,622          
Accounts payable and accrued liabilities 5,887          
Accrued compensation 7,817          
Fiduciary liabilities 146,685          
Operating lease liabilities 4,674          
Deferred tax liabilities 58,844          
Total liabilities assumed 223,907          
Net assets acquired 738,715          
2025 Acquisitions | Customer Relationships            
Business Combination [Line Items]            
Intangible assets $ 287,703          
Weighted average amortization period 13 years 1 month 6 days          
2025 Acquisitions | Other intangible assets            
Business Combination [Line Items]            
Intangible assets $ 12,567          
Velocity            
Business Combination [Line Items]            
Cash and cash equivalents         $ 17,736  
Commissions and fees receivable – net         23,650  
Fiduciary cash and receivables         105,779  
Goodwill         366,249  
Property and equipment – net         0  
Lease right-of-use assets         3,757  
Other current and non-current assets         2,862  
Total assets acquired         748,433  
Accounts payable and accrued liabilities         5,305  
Accrued compensation         7,129  
Fiduciary liabilities         105,779  
Operating lease liabilities         3,757  
Deferred tax liabilities         57,298  
Total liabilities assumed         179,268  
Net assets acquired         569,165  
Velocity | Customer Relationships            
Business Combination [Line Items]            
Intangible assets         216,400  
Velocity | Other intangible assets            
Business Combination [Line Items]            
Intangible assets         $ 12,000  
USQ            
Business Combination [Line Items]            
Cash and cash equivalents       $ 0    
Commissions and fees receivable – net       13,124    
Fiduciary cash and receivables       1,649    
Goodwill       20,539    
Property and equipment – net       0    
Lease right-of-use assets       612    
Other current and non-current assets       101    
Total assets acquired       55,325    
Accounts payable and accrued liabilities       193    
Accrued compensation       373    
Fiduciary liabilities       1,649    
Operating lease liabilities       612    
Deferred tax liabilities       0    
Total liabilities assumed       2,827    
Net assets acquired       52,498    
USQ | Customer Relationships            
Business Combination [Line Items]            
Intangible assets       19,100    
USQ | Other intangible assets            
Business Combination [Line Items]            
Intangible assets       $ 200    
360° Underwriting            
Business Combination [Line Items]            
Cash and cash equivalents     $ 412      
Commissions and fees receivable – net     939      
Fiduciary cash and receivables     6,674      
Goodwill     16,615      
Property and equipment – net     0      
Lease right-of-use assets     0      
Other current and non-current assets     82      
Total assets acquired     37,092      
Accounts payable and accrued liabilities     0      
Accrued compensation     43      
Fiduciary liabilities     6,674      
Operating lease liabilities     0      
Deferred tax liabilities     1,546      
Total liabilities assumed     8,263      
Net assets acquired     28,829      
360° Underwriting | Customer Relationships            
Business Combination [Line Items]            
Intangible assets     12,303      
360° Underwriting | Other intangible assets            
Business Combination [Line Items]            
Intangible assets     $ 67      
J.M. Wilson Corporation            
Business Combination [Line Items]            
Cash and cash equivalents   $ 0        
Commissions and fees receivable – net   3,679        
Fiduciary cash and receivables   29,597        
Goodwill   47,187        
Property and equipment – net   494        
Lease right-of-use assets   305        
Other current and non-current assets   310        
Total assets acquired   121,772        
Accounts payable and accrued liabilities   389        
Accrued compensation   272        
Fiduciary liabilities   32,583        
Operating lease liabilities   305        
Deferred tax liabilities   0        
Total liabilities assumed   33,549        
Net assets acquired   88,223        
J.M. Wilson Corporation | Customer Relationships            
Business Combination [Line Items]            
Intangible assets   39,900        
J.M. Wilson Corporation | Other intangible assets            
Business Combination [Line Items]            
Intangible assets   $ 300