Loans (Schedule of Financing Receivables, Non-Accrual Status) (Details) $ in Thousands	Mar. 31, 2019 USD ($) loan	Dec. 31, 2018 USD ($) loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non- accrual delinquent loans | $	$ 5,738	$ 11,152
Number of loans, non- accrual delinquent loans | loan	21	23
Non-accrual current loans | $	$ 8,077	$ 8,130
Number of loans, non-accrual current loans | loan	16	15
Total non-accrual loans | $	$ 13,815	$ 19,282
Total number of loans | loan	37	38
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non- accrual delinquent loans | $	$ 4,022	$ 8,474
Number of loans, non- accrual delinquent loans | loan	8	11
Non-accrual current loans | $	$ 6,088	$ 6,158
Number of loans, non-accrual current loans | loan	6	6
Total non-accrual loans | $	$ 10,110	$ 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 | $	$ 149	$ 146
Number of loans, non- accrual delinquent loans | loan	2	1
Non-accrual current loans | $	$ 1,217	$ 1,228
Number of loans, non-accrual current loans | loan	4	4
Total non-accrual loans | $	$ 1,366	$ 1,374
Total number of loans | loan	6	5
Residential Rentals Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non- accrual delinquent loans | $	$ 258	$ 260
Number of loans, non- accrual delinquent loans | loan	2	2
Non-accrual current loans | $	$ 737	$ 703
Number of loans, non-accrual current loans | loan	4	3
Total non-accrual loans | $	$ 995	$ 963
Total number of loans | loan	6	5
Home Equity And Second Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non- accrual delinquent loans | $	$ 193	$ 147
Number of loans, non- accrual delinquent loans | loan	3	2
Total non-accrual loans | $	$ 193	$ 147
Total number of loans | loan	3	2
Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non- accrual delinquent loans | $	$ 829	$ 866
Number of loans, non- accrual delinquent loans | loan	2	2
Total non-accrual loans | $	$ 829	$ 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 | $	$ 287	$ 1,259
Number of loans, non- accrual delinquent loans | loan	4	5
Non-accrual current loans | $	$ 35	$ 41
Number of loans, non-accrual current loans | loan	2	2
Total non-accrual loans | $	$ 322	$ 1,300
Total number of loans | loan	6	7