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Loans And Leases (Narrative) (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2020
USD ($)
loan
Sep. 30, 2019
USD ($)
loan
Sep. 30, 2020
USD ($)
loan
Sep. 30, 2019
USD ($)
loan
Dec. 31, 2019
USD ($)
Accounts Notes And Loans Receivable [Line Items]          
Loans $ 871,709,000   $ 871,709,000   $ 663,303,000
Loans 90 days or more past due and still accruing interest    
Total TDR's 2,918,000   2,918,000   2,923,000
Allocated specific reserves to modified TDRs $ 23,000   $ 23,000   22,000
Number of loans modified as a TDR | loan     0 0  
Number of TDRs in payment default | loan 0 0      
Cash payments of interest $ 51,000 $ 44,000 $ 105,000 $ 132,000  
Recorded investment of loans undergoing modifications, not TDRs 46,680,000 $ 12,707,000 46,680,000 $ 12,707,000  
Loans 887,201,000   887,201,000   670,441,000
Deferral loans outstanding balance $ 24,000,000   $ 24,000,000    
Northpointe [Member] | Mortgage Purchase Program [Member]          
Accounts Notes And Loans Receivable [Line Items]          
Average days     14 days    
Percent of loans risk rated for capital adequacy     100.00%    
Percent of participation agreement interest 95.00%   95.00%    
Ownership interest in each loan is participates     5.00%    
Allowance allocated loans $ 0   $ 0    
Single-Family Residential [Member]          
Accounts Notes And Loans Receivable [Line Items]          
Loans 140,635,000   140,635,000   120,256,000
Single-Family Residential [Member] | Northpointe [Member] | Mortgage Purchase Program [Member]          
Accounts Notes And Loans Receivable [Line Items]          
Loans 24,569,000   24,569,000   26,046,000
Accruing [Member]          
Accounts Notes And Loans Receivable [Line Items]          
Total TDR's 2,918,000   2,918,000   $ 2,838,000
Commercial Loans - Paycheck Protection Program [Member]          
Accounts Notes And Loans Receivable [Line Items]          
Loans $ 122,900,000   $ 122,900,000    
Maturity term     2 years    
Stated interest rate 1.00%   1.00%