Loans (Schedule of Financing Receivables, Non-Accrual Status) (Details) $ in Thousands	Mar. 31, 2020 USD ($) numberOfLoans	Dec. 31, 2019 USD ($) numberOfLoans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non- accrual delinquent loans | $	$ 14,854	$ 12,787
Number of loans, non- accrual delinquent loans | numberOfLoans	25	21
Non-accrual current loans | $	$ 1,495	$ 5,070
Number of loans, non-accrual current loans | numberOfLoans	9	18
Total non-accrual loans | $	$ 16,349	$ 17,857
Total number of loans | numberOfLoans	34	39
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non- accrual delinquent loans | $	$ 10,970	$ 10,562
Number of loans, non- accrual delinquent loans | numberOfLoans	12	11
Non-accrual current loans | $	$ 1,126	$ 1,687
Number of loans, non-accrual current loans | numberOfLoans	3	5
Total non-accrual loans | $	$ 12,096	$ 12,249
Total number of loans | numberOfLoans	15	16
Residential First Mortgages Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non- accrual delinquent loans | $	$ 196
Number of loans, non- accrual delinquent loans | numberOfLoans	1
Non-accrual current loans | $		$ 830
Number of loans, non-accrual current loans | numberOfLoans		3
Total non-accrual loans | $	$ 196	$ 830
Total number of loans | numberOfLoans	1	3
Residential Rentals Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non- accrual delinquent loans | $	$ 239
Number of loans, non- accrual delinquent loans | numberOfLoans	1
Non-accrual current loans | $	$ 46	$ 937
Number of loans, non-accrual current loans | numberOfLoans	1	5
Total non-accrual loans | $	$ 285	$ 937
Total number of loans | numberOfLoans	2	5
Home Equity And Second Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non- accrual delinquent loans | $	$ 153	$ 177
Number of loans, non- accrual delinquent loans | numberOfLoans	3	3
Non-accrual current loans | $	$ 302	$ 271
Number of loans, non-accrual current loans | numberOfLoans	3	3
Total non-accrual loans | $	$ 455	$ 448
Total number of loans | numberOfLoans	6	6
Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non- accrual delinquent loans | $	$ 2,906	$ 1,807
Number of loans, non- accrual delinquent loans | numberOfLoans	3	2
Non-accrual current loans | $		$ 1,320
Number of loans, non-accrual current loans | numberOfLoans		1
Total non-accrual loans | $	$ 2,906	$ 3,127
Total number of loans | numberOfLoans	3	3
Commercial Equipment Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non- accrual delinquent loans | $	$ 390	$ 241
Number of loans, non- accrual delinquent loans | numberOfLoans	5	5
Non-accrual current loans | $	$ 21	$ 25
Number of loans, non-accrual current loans | numberOfLoans	2	1
Total non-accrual loans | $	$ 411	$ 266
Total number of loans | numberOfLoans	7	6