Loans (Schedule of Financing Receivables, Non-Accrual Status) (Details) $ in Thousands	Jun. 30, 2020 USD ($) numberOfLoans	Dec. 31, 2019 USD ($) numberOfLoans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non- accrual delinquent loans | $	$ 20,077	$ 12,787
Number of loans, non- accrual delinquent loans | numberOfLoans	26	21
Non-accrual current loans | $	$ 2,819	$ 5,070
Number of loans, non-accrual current loans | numberOfLoans	13	18
Total non-accrual loans | $	$ 22,896	$ 17,857
Total number of loans | numberOfLoans	39	39
Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non- accrual delinquent loans | $	$ 18,083	$ 10,562
Number of loans, non- accrual delinquent loans | numberOfLoans	18	11
Non-accrual current loans | $	$ 1,878	$ 1,687
Number of loans, non-accrual current loans | numberOfLoans	5	5
Total non-accrual loans | $	$ 19,961	$ 12,249
Total number of loans | numberOfLoans	23	16
Residential first mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual current loans | $	$ 194	$ 830
Number of loans, non-accrual current loans | numberOfLoans	1	3
Total non-accrual loans | $	$ 194	$ 830
Total number of loans | numberOfLoans	1	3
Residential rentals
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual current loans | $	$ 281	$ 937
Number of loans, non-accrual current loans | numberOfLoans	2	5
Total non-accrual loans | $	$ 281	$ 937
Total number of loans | numberOfLoans	2	5
Home equity and second mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non- accrual delinquent loans | $	$ 132	$ 177
Number of loans, non- accrual delinquent loans | numberOfLoans	3	3
Non-accrual current loans | $	$ 451	$ 271
Number of loans, non-accrual current loans | numberOfLoans	3	3
Total non-accrual loans | $	$ 583	$ 448
Total number of loans | numberOfLoans	6	6
Commercial loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non- accrual delinquent loans | $	$ 1,807	$ 1,807
Number of loans, non- accrual delinquent loans | numberOfLoans	2	2
Non-accrual current loans | $		$ 1,320
Number of loans, non-accrual current loans | numberOfLoans		1
Total non-accrual loans | $	$ 1,807	$ 3,127
Total number of loans | numberOfLoans	2	3
Consumer loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non- accrual delinquent loans | $	$ 5
Number of loans, non- accrual delinquent loans | numberOfLoans	1
Commercial equipment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non- accrual delinquent loans | $	$ 50	$ 241
Number of loans, non- accrual delinquent loans | numberOfLoans	2	5
Non-accrual current loans | $	$ 15	$ 25
Number of loans, non-accrual current loans | numberOfLoans	2	1
Total non-accrual loans | $	$ 65	$ 266
Total number of loans | numberOfLoans	4	6