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Loans (Schedule of Financing Receivable Recorded Investment Credit Quality Indicator) (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Sep. 30, 2019
Dec. 31, 2018
Loans and Leases Receivable Disclosure [Line Items]      
Loans $ 1,454,172   $ 1,346,922
Unrated [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 350,699   333,349
Pass [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 1,076,610   981,347
Special Mention [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 0   0
Substandard [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 26,863   32,226
Doubtful [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 0   0
Loss [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 0   0
Commercial Real Estate Portfolio Segment [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 964,777   878,016
Commercial Real Estate Portfolio Segment [Member] | Unrated [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 102,695   112,280
Commercial Real Estate Portfolio Segment [Member] | Pass [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 840,403   741,037
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 0   0
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 21,679   24,699
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 0   0
Commercial Real Estate Portfolio Segment [Member] | Loss [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 0   0
Construction And Land Development Portfolio Segment [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 34,133 $ 34,100 29,705
Construction And Land Development Portfolio Segment [Member] | Unrated [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 2,075   2,172
Construction And Land Development Portfolio Segment [Member] | Pass [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 32,058   26,805
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   728
Construction And Land Development Portfolio Segment [Member] | Doubtful [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 0   0
Construction And Land Development Portfolio Segment [Member] | Loss [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 0   0
Residential Rentals Portfolio Segment [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 123,601   124,298
Residential Rentals Portfolio Segment [Member] | Unrated [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 38,139   37,478
Residential Rentals Portfolio Segment [Member] | Pass [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 84,811   85,551
Residential Rentals Portfolio Segment [Member] | Special Mention [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 0   0
Residential Rentals Portfolio Segment [Member] | Substandard [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 651   1,269
Residential Rentals Portfolio Segment [Member] | Doubtful [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 0   0
Residential Rentals Portfolio Segment [Member] | Loss [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 0   0
Commercial Portfolio Segment [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 63,102 63,100 71,680
Commercial Portfolio Segment [Member] | Unrated [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 16,754   19,157
Commercial Portfolio Segment [Member] | Pass [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 43,221   49,828
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 3,127   2,695
Commercial Portfolio Segment [Member] | Doubtful [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 0   0
Commercial Portfolio Segment [Member] | Loss [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 0   0
Commercial Equipment Portfolio Segment [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 63,647   50,202
Commercial Equipment Portfolio Segment [Member] | Unrated [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 26,045   15,373
Commercial Equipment Portfolio Segment [Member] | Pass [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 37,399   33,685
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 203   1,144
Commercial Equipment Portfolio Segment [Member] | Doubtful [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 0   0
Commercial Equipment Portfolio Segment [Member] | Loss [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 0   0
Commercial Portfolio [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 1,249,260   1,153,901
Commercial Portfolio [Member] | Unrated [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 185,708   186,460
Commercial Portfolio [Member] | Pass [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 1,037,892   936,906
Commercial Portfolio [Member] | Special Mention [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 0   0
Commercial Portfolio [Member] | Substandard [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 25,660   30,535
Commercial Portfolio [Member] | Doubtful [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 0   0
Commercial Portfolio [Member] | Loss [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 0   0
Non Commercial Portfolio Segment [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 204,912   193,021
Non Commercial Portfolio Segment [Member] | Unrated [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 164,991   146,889
Non Commercial Portfolio Segment [Member] | Pass [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 38,718   44,441
Non Commercial Portfolio Segment [Member] | Special Mention [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 0   0
Non Commercial Portfolio Segment [Member] | Substandard [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 1,203   1,691
Non Commercial Portfolio Segment [Member] | Doubtful [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 0   0
Non Commercial Portfolio Segment [Member] | Loss [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 0   0
Residential First Mortgages Portfolio Segment [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 167,710   156,709
Residential First Mortgages Portfolio Segment [Member] | Performing Financial Instruments [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 167,710   156,563
Residential First Mortgages Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 0   146
Home Equity And Second Mortgages Portfolio Segment [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 36,098 $ 36,100 35,561
Home Equity And Second Mortgages Portfolio Segment [Member] | Performing Financial Instruments [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 35,921   35,414
Home Equity And Second Mortgages Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 177   147
Consumer Portfolio Segment [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 1,104   751
Consumer Portfolio Segment [Member] | Performing Financial Instruments [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans 1,104   751
Consumer Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]      
Loans and Leases Receivable Disclosure [Line Items]      
Loans $ 0   $ 0