v3.25.4
Summary of Significant Accounting Policies - Additional Information (Detail)
 6 Months Ended 12 Months Ended
Dec. 31, 2024
USD ($)
Dec. 31, 2025
USD ($)
Segment
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Summary Of Significant Accounting Policies [Line Items]        
Other equity investments $ 4,800,000 $ 4,900,000 $ 4,800,000  
Other investments 19,405,000 20,781,000 19,405,000  
Loans held for sale 30,976,000 14,769,000 30,976,000  
Allowance for credit losses 23,023,000 $ 19,444,000 23,023,000 $ 35,893,000
Estimated useful lives   us-gaap:UsefulLifeShorterOfTermOfLeaseOrAssetUtilityMember    
Lease Income   $ 0 0  
Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration]   srt:BoardOfDirectorsChairmanMember, srt:ChiefExecutiveOfficerMember    
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 327,788,000 $ 323,691,000 327,788,000 $ 185,989,000
MSR assets 400,000 0 400,000  
MSR sold mortgages unpaid principal balance 1,940,000,000   1,940,000,000  
MSR assets sale recourse obligations 1,800,000 200,000 1,800,000  
Loss from sale of MSR 3,600,000      
Recourse Reserve   $ 1,400,000    
Number of reportable business segments | Segment   3    
Proceeds from surrender of bank owned life insurance policies 48,200,000 $ 212,000 48,225,000  
OREO balances 0 200,000 0  
Income tax benefit   3,066,000 (1,122,000)  
Minimum [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Asset with financial institutions   1,000,000,000    
Maximum [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Asset with financial institutions   $ 5,000,000,000    
Building [Member] | Maximum [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Estimated useful lives   40 years    
Furniture, Fixtures and Equipment [Member] | Minimum [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Estimated useful lives   3 years    
Furniture, Fixtures and Equipment [Member] | Maximum [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Estimated useful lives   15 years    
Special Mention [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Line Of credit facility current borrowing capacity   $ 500,000,000    
Pooled Loans [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Line Of credit facility current borrowing capacity   1,000,000,000    
Fintech [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Loans held for sale 23,300,000 14,800,000 23,300,000  
Residential Mortgage Loan [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Loans held for sale 7,700,000 0 7,700,000  
Bank Owned Life Insurance [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Bank owned life insurance 1,100,000 $ 900,000 $ 1,100,000  
Bank Owned Life Insurance [Member] | Cash Surrender Value [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Gain loss on investment 0      
Income tax benefit $ 2,200,000