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Basis of Presentation and Significant Accounting Policies (Details)
 12 Months Ended
Dec. 31, 2025
USD ($)
segment
branch
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Product Information [Line Items]      
Reserve and clearing required balance $ 0 $ 0  
Interest on loans held-for-investment, threshold period past due 90 days    
Qualified affordable housing project investment $ 7,200,000 8,300,000  
Unfunded commitments $ 3,200,000 $ 5,800,000  
Investment, Proportional Amortization Method, Elected, Statement of Financial Position [Extensible Enumeration] Accrued interest payable and other liabilities Accrued interest payable and other liabilities  
Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Income or Comprehensive Income [Extensible Enumeration] Income tax expense   Income tax expense
Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Cash Flows [Extensible Enumeration]   Income tax expense  
Amortization expense recognized on qualified affordable housing projects $ 1,000,000.0 $ 572,000 $ 451,000
Investment Program, Proportional Amortization Method, Elected, Income Tax Credit and Other Income Tax Benefit, before Amortization, Statement of Income or Comprehensive Income [Extensible Enumeration] Federal Home Loan Bank and other restricted stock, at cost   Federal Home Loan Bank and other restricted stock, at cost
Investment Program, Proportional Amortization Method, Elected, Income Tax Credit and Other Income Tax Benefit, before Amortization, Statement of Cash Flows [Extensible Enumeration]   Federal Home Loan Bank and other restricted stock, at cost  
Federal tax credits and other benefits $ 1,000,000.0 $ 757,000 $ 674,000
Impairment of qualified affordable housing projects 0 0  
Investment in private equity $ 0 $ 1,000,000 $ 0
Number of reportable segments | segment 1    
Number of operating segments | segment 1    
Closed Loans      
Product Information [Line Items]      
Charge-off time period 120 days    
Open Loans      
Product Information [Line Items]      
Charge-off time period 180 days    
Minimum      
Product Information [Line Items]      
Lease renewal term 1 year    
Minimum | Furniture, fixtures and equipment      
Product Information [Line Items]      
Estimated useful lives of premises and equipment 3 years    
Maximum      
Product Information [Line Items]      
Lease renewal term 5 years    
Maximum | Furniture, fixtures and equipment      
Product Information [Line Items]      
Estimated useful lives of premises and equipment 7 years    
California      
Product Information [Line Items]      
Number of full-service branches | branch 9    
California | Minimum      
Product Information [Line Items]      
Total assets of peer group $ 1,000,000,000    
California | Maximum      
Product Information [Line Items]      
Total assets of peer group $ 10,000,000,000    
New Jersey and New York      
Product Information [Line Items]      
Number of full-service branches | branch 3    
Texas      
Product Information [Line Items]      
Number of full-service branches | branch 2    
GEORGIA      
Product Information [Line Items]      
Number of full-service branches | branch 1