Loans (Schedule of Financing Receivables, Non-Accrual Status) (Details) $ in Thousands	Sep. 30, 2019 USD ($) Loan	Dec. 31, 2018 USD ($) Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non- accrual delinquent loans | $	$ 11,715	$ 11,152
Number of loans, non- accrual delinquent loans | Loan	23	23
Non-accrual current loans | $	$ 3,718	$ 8,130
Number of loans, non-accrual current loans | Loan	17	15
Total non-accrual loans | $	$ 15,433	$ 19,282
Total number of loans | Loan	40	38
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non- accrual delinquent loans | $	$ 10,256	$ 8,474
Number of loans, non- accrual delinquent loans | Loan	10	11
Non-accrual current loans | $	$ 1,603	$ 6,158
Number of loans, non-accrual current loans | Loan	4	6
Total non-accrual loans | $	$ 11,859	$ 14,632
Total number of loans | Loan	14	17
Residential First Mortgages Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non- accrual delinquent loans | $	$ 146	$ 146
Number of loans, non- accrual delinquent loans | Loan	1	1
Non-accrual current loans | $	$ 841	$ 1,228
Number of loans, non-accrual current loans | Loan	3	4
Total non-accrual loans | $	$ 987	$ 1,374
Total number of loans | Loan	4	5
Residential Rentals Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non- accrual delinquent loans | $	$ 0	$ 260
Number of loans, non- accrual delinquent loans | Loan		2
Non-accrual current loans | $	$ 956	$ 703
Number of loans, non-accrual current loans | Loan	5	3
Total non-accrual loans | $	$ 956	$ 963
Total number of loans | Loan	5	5
Home Equity And Second Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non- accrual delinquent loans | $	$ 211	$ 147
Number of loans, non- accrual delinquent loans | Loan	5	2
Non-accrual current loans | $	$ 310
Number of loans, non-accrual current loans | Loan	3
Total non-accrual loans | $	$ 521	$ 147
Total number of loans | Loan	8	2
Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non- accrual delinquent loans | $	$ 822	$ 866
Number of loans, non- accrual delinquent loans | Loan	2	2
Total non-accrual loans | $	$ 822	$ 866
Total number of loans | Loan	2	2
Commercial Equipment Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non- accrual delinquent loans | $	$ 280	$ 1,259
Number of loans, non- accrual delinquent loans | Loan	5	5
Non-accrual current loans | $	$ 8	$ 41
Number of loans, non-accrual current loans | Loan	2	2
Total non-accrual loans | $	$ 288	$ 1,300
Total number of loans | Loan	7	7