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Loans Receivable - Textual (Details)
 12 Months Ended
Dec. 31, 2023
USD ($)
segment
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Number of loan segments | segment 4    
Maximum loan-to-value percentage 80.00%    
Interest and fees on loans $ 217,284,000 $ 174,275,000 $ 189,832,000
Loans 90 days or more past due, still accruing interest 1,300,000 1,600,000  
Modified loans that were past due 29,653,000    
Loans to borrowers 0    
Servicing fee income and fees from SBA loans serviced for others 135,000 217,000 $ 320,000
Servicing asset 128,000 192,000  
Valuation allowance on servicing asset $ 0 0  
Financing Receivable, Accrued Interest, After Allowance For Credit Loss, Statement Of Financial Position Extensible List Not Disclosed Flag true    
Related Party      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total outstanding commitments $ 113,000 5,000  
Loans Receivable      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Accrued interest receivable on loans receivable 13,300,000 11,300,000  
30-89 Days      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Modified loans that were past due 0    
90 Days or Greater      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Modified loans that were past due 0    
Nonaccrual      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Interest and fees on loans $ 0 $ 0  
Residential real estate      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Maximum percent of lower of appraised value at origination or cost of underlying collateral 80.00%    
Residential real estate | Minimum      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Terms of maturity on loans 15 years    
Residential real estate | Maximum      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Terms of maturity on loans 30 years