Loans (Loan Receivable and Allowance Balances Disaggregated) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Loan receivables:
Ending balance: individually evaluated for impairment	$ 43,254	$ 35,360
Ending balance: collectively evaluated for impairment	1,106,790	1,053,622
Total Loan Receivables	1,150,044	1,088,982
Allowance for loan losses:
Ending balance: individually evaluated for impairment	1,024	1,289
Ending balance: collectively evaluated for impairment	9,491	8,571
Total Allowance for loan losses	10,515	9,860	$ 8,540	$ 8,481
Commercial Real Estate Portfolio Segment [Member]
Loan receivables:
Ending balance: individually evaluated for impairment	32,929	21,977
Ending balance: collectively evaluated for impairment	694,385	645,128
Total Loan Receivables	727,314	667,105
Allowance for loan losses:
Ending balance: individually evaluated for impairment	370	806
Ending balance: collectively evaluated for impairment	6,081	4,406
Total Allowance for loan losses	6,451	5,212	3,465	3,528
Residential First Mortgages Portfolio Segment [Member]
Loan receivables:
Ending balance: individually evaluated for impairment	2,437	2,413
Ending balance: collectively evaluated for impairment	167,937	168,591
Total Loan Receivables	170,374	171,004
Allowance for loan losses:
Ending balance: individually evaluated for impairment	2	7
Ending balance: collectively evaluated for impairment	1,142	1,399
Total Allowance for loan losses	1,144	1,406	584	1,047
Residential Rentals Portfolio Segment [Member]
Loan receivables:
Ending balance: individually evaluated for impairment	2,376	3,028
Ending balance: collectively evaluated for impairment	107,852	98,869
Total Loan Receivables	110,228	101,897
Allowance for loan losses:
Ending balance: individually evaluated for impairment	18	36
Ending balance: collectively evaluated for impairment	494	326
Total Allowance for loan losses	512	362	538	593
Construction And Land Development Portfolio Segment [Member]
Loan receivables:
Ending balance: individually evaluated for impairment	729	3,777
Ending balance: collectively evaluated for impairment	27,142	33,157
Total Loan Receivables	27,871	36,934
Allowance for loan losses:
Ending balance: individually evaluated for impairment	163	178
Ending balance: collectively evaluated for impairment	299	763
Total Allowance for loan losses	462	941	1,103	1,071
Home Equity And Second Mortgages Portfolio Segment [Member]
Loan receivables:
Ending balance: individually evaluated for impairment	317	170
Ending balance: collectively evaluated for impairment	21,034	21,229
Total Loan Receivables	21,351	21,399
Allowance for loan losses:
Ending balance: collectively evaluated for impairment	162	138
Total Allowance for loan losses	162	138	142	173
Commercial Portfolio Segment [Member]
Loan receivables:
Ending balance: individually evaluated for impairment	2,951	3,204
Ending balance: collectively evaluated for impairment	53,466	47,280
Total Loan Receivables	56,417	50,484
Allowance for loan losses:
Ending balance: individually evaluated for impairment	168	123
Ending balance: collectively evaluated for impairment	845	671
Total Allowance for loan losses	1,013	794	1,477	1,677
Consumer Portfolio Segment [Member]
Loan receivables:
Ending balance: collectively evaluated for impairment	573	422
Total Loan Receivables	573	422
Allowance for loan losses:
Ending balance: collectively evaluated for impairment	7	3
Total Allowance for loan losses	7	3	2	3
Commercial Equipment Portfolio Segment [Member]
Loan receivables:
Ending balance: individually evaluated for impairment	1,515	791
Ending balance: collectively evaluated for impairment	34,401	38,946
Total Loan Receivables	35,916	39,737
Allowance for loan losses:
Ending balance: individually evaluated for impairment	303	139
Ending balance: collectively evaluated for impairment	461	865
Total Allowance for loan losses	$ 764	$ 1,004	$ 1,229	$ 389