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Loans (Schedule of Financing Receivable Recorded Investment Credit Quality Indicator) (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Mar. 31, 2019
Loans and Leases Receivable Disclosure [Line Items]      
Loans $ 1,490,089 $ 1,454,172 $ 1,363,176
Unrated [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 381,619 350,699  
Pass [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 1,080,274 1,076,610  
Special Mention [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 1,045 0  
Substandard [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 27,151 26,863  
Commercial Real Estate Portfolio Segment [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 977,678 964,777 891,165
Commercial Real Estate Portfolio Segment [Member] | Unrated [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 126,211 102,695  
Commercial Real Estate Portfolio Segment [Member] | Pass [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 828,041 840,403  
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 202 0  
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 23,224 21,679  
Construction And Land Development Portfolio Segment [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 38,627 34,133 32,798
Construction And Land Development Portfolio Segment [Member] | Unrated [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 2,785 2,075  
Construction And Land Development Portfolio Segment [Member] | Pass [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 35,842 32,058  
Construction And Land Development Portfolio Segment [Member] | Special Mention [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 0 0  
Construction And Land Development Portfolio Segment [Member] | Substandard [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans   0  
Residential Rentals Portfolio Segment [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 133,016 123,601 124,518
Residential Rentals Portfolio Segment [Member] | Unrated [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 39,494 38,139  
Residential Rentals Portfolio Segment [Member] | Pass [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 93,152 84,811  
Residential Rentals Portfolio Segment [Member] | Special Mention [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 370 0  
Residential Rentals Portfolio Segment [Member] | Substandard [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 0 651  
Commercial Portfolio Segment [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 70,971 63,102 70,725
Commercial Portfolio Segment [Member] | Unrated [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 17,127 16,754  
Commercial Portfolio Segment [Member] | Pass [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 50,938 43,221  
Commercial Portfolio Segment [Member] | Special Mention [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 0 0  
Commercial Portfolio Segment [Member] | Substandard [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 2,906 3,127  
Commercial Equipment Portfolio Segment [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 61,931 63,647 49,720
Commercial Equipment Portfolio Segment [Member] | Unrated [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 25,633 26,045  
Commercial Equipment Portfolio Segment [Member] | Pass [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 35,948 37,399  
Commercial Equipment Portfolio Segment [Member] | Special Mention [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 0 0  
Commercial Equipment Portfolio Segment [Member] | Substandard [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 350 203  
Total Commercial Portfolios [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 1,282,223 1,249,260  
Total Commercial Portfolios [Member] | Unrated [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 211,250 185,708  
Total Commercial Portfolios [Member] | Pass [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 1,043,921 1,037,892  
Total Commercial Portfolios [Member] | Special Mention [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 572 0  
Total Commercial Portfolios [Member] | Substandard [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 26,480 25,660  
Non Commercial Portfolio Segment [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 207,866 204,912  
Non Commercial Portfolio Segment [Member] | Unrated [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 170,369 164,991  
Non Commercial Portfolio Segment [Member] | Pass [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 36,353 38,718  
Non Commercial Portfolio Segment [Member] | Special Mention [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 473 0  
Non Commercial Portfolio Segment [Member] | Substandard [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 671 1,203  
Residential First Mortgages Portfolio Segment [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 170,795 167,710 156,653
Residential First Mortgages Portfolio Segment [Member] | Performing Financial Instruments [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 170,795 167,710  
Residential First Mortgages Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 0 0  
Home Equity And Second Mortgage Loans [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 35,937 36,098 36,746
Home Equity And Second Mortgage Loans [Member] | Performing Financial Instruments [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 35,784 35,921  
Home Equity And Second Mortgage Loans [Member] | Nonperforming Financial Instruments [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 153 177  
Consumer Portfolio Segment [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 1,134 1,104 $ 851
Consumer Portfolio Segment [Member] | Performing Financial Instruments [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans $ 1,134 $ 1,104