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Related Party Transactions - Additional Information (Details) - USD ($)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Related Party Transaction [Line Items]        
Related party notes payable $ 5,635,000 $ 0 $ 5,635,000  
Commissions and fees   1,493,680,000 1,377,116,000 $ 1,211,828,000
Right-of-use assets 72,367,000 61,976,000 72,367,000  
Operating lease liabilities 85,853,000 75,739,000 85,853,000  
Related Party        
Related Party Transaction [Line Items]        
Producer commissions received   500,000 600,000 600,000
Commitment to USF paid   400,000 400,000 300,000
Related Party | Emerald Bay        
Related Party Transaction [Line Items]        
Investments in Emerald Bay 2,100,000 2,300,000 2,100,000  
Related Party | Holding Company of the Villages, Inc. and Affiliated Entities        
Related Party Transaction [Line Items]        
Rent expense   800,000 700,000 400,000
Right-of-use assets 1,300,000 1,700,000 1,300,000  
Operating lease liabilities 1,400,000 1,800,000 1,400,000  
Related Party | Other Parties, Excluding Holding Company of the Villages, Inc.        
Related Party Transaction [Line Items]        
Rent expense   3,100,000 3,700,000 3,900,000
Right-of-use assets 9,700,000 7,600,000 9,700,000  
Operating lease liabilities 10,300,000 8,800,000 10,300,000  
Broker Services | Related Party | Holding Company of the Villages, Inc. and Affiliated Entities        
Related Party Transaction [Line Items]        
Commissions and fees   2,500,000 2,400,000 2,100,000
Broker Services | Related Party | Entities In Which Member of Board of Directors Has Material Interest        
Related Party Transaction [Line Items]        
Commissions and fees   $ 300,000 $ 200,000 $ 300,000
Minimum | Related Party | Holding Company of the Villages, Inc. and Affiliated Entities        
Related Party Transaction [Line Items]        
Monthly rent expense per lease 3,000      
Minimum | Related Party | Other Parties, Excluding Holding Company of the Villages, Inc.        
Related Party Transaction [Line Items]        
Monthly rent expense per lease 2,000      
Maximum | Related Party | Holding Company of the Villages, Inc. and Affiliated Entities        
Related Party Transaction [Line Items]        
Monthly rent expense per lease 18,000      
Maximum | Related Party | Other Parties, Excluding Holding Company of the Villages, Inc.        
Related Party Transaction [Line Items]        
Monthly rent expense per lease $ 61,000