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Loans and Allowance for Loan Losses - Narrative (Details)
12 Months Ended
Dec. 31, 2022
USD ($)
loanClass
loan
Dec. 31, 2021
USD ($)
loan
Mar. 31, 2020
loan
Financing Receivable, Past Due [Line Items]      
Number of commercial loan classes | loanClass 2    
Number of real estate loan classes | loanClass 6    
Total loans $ 2,793,466,000 $ 1,936,066,000  
Principal amount outstanding on loans 1,649,000 46,601,000  
Loans greater than 90 days past due $ 0 $ 0  
Number of collateral dependent loans | loan 1 0  
Unpaid principal balance of commercial term loan $ 123,000 $ 172,000  
Weighted average loan-to-value of impaired loans (in percent) 0.8242 0.7067  
Interest income related to non-accrual loans $ 39,000 $ 33,000  
Number of loans outstanding with a TDR designation | loan 1 0  
Pledged loans $ 1,627,056,000 $ 941,160,000  
Commercial:      
Financing Receivable, Past Due [Line Items]      
Unpaid principal balance of commercial term loan 175,000    
Commercial secured loan with TDR designation      
Financing Receivable, Past Due [Line Items]      
Outstanding loan balance $ 29,000    
Loan Concentration Risk | Loans | Real Estate Portfolio Segment      
Financing Receivable, Past Due [Line Items]      
Concentration risk (in percent) 92.00%    
Loan Concentration Risk | Loans | Commercial:      
Financing Receivable, Past Due [Line Items]      
Concentration risk (in percent) 7.00%    
Loan Concentration Risk | Loans | Consumer and other      
Financing Receivable, Past Due [Line Items]      
Concentration risk (in percent) 1.00%    
Paycheck Protection Program (“PPP”)      
Financing Receivable, Past Due [Line Items]      
Number of loans funded | loan     1,500
Earned interest percentage 1.00%    
Total loans $ 0 22,124,000  
Paycheck Protection Program (“PPP”) | Commercial:      
Financing Receivable, Past Due [Line Items]      
Total loans   22,124,000  
Paycheck Protection Program (“PPP”) | Minimum      
Financing Receivable, Past Due [Line Items]      
Loan term (in years) 2 years    
Fee percentage received on loans 1.00%    
Paycheck Protection Program (“PPP”) | Maximum      
Financing Receivable, Past Due [Line Items]      
Loan term (in years) 5 years    
Fee percentage received on loans 5.00%    
Federal Reserve Bank Of San Francisco      
Financing Receivable, Past Due [Line Items]      
FRB pledged loans $ 41,934,000 33,391,000  
Financial Asset, 60 to 89 Days Past Due      
Financing Receivable, Past Due [Line Items]      
Loans between 60-89 days past due $ 0 $ 0