Loans (Schedule of Financing Receivable Recorded Investment Credit Quality Indicator) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Loans	$ 1,290,415	$ 1,150,044	$ 1,142,010
Unrated [Member]
Loans	284,114	283,612
Pass [Member]
Loans	970,785	826,030
Special Mention [Member]
Loans	854	96
Substandard [Member]
Loans	34,559	40,306
Doubtful [Member]
Loans	103
Commercial Real Estate Loans [Member]
Loans	828,445	727,314	713,789
Commercial Real Estate Loans [Member] | Unrated [Member]
Loans	75,916	75,581
Commercial Real Estate Loans [Member] | Pass [Member]
Loans	725,402	619,604
Commercial Real Estate Loans [Member] | Special Mention [Member]
Loans	582
Commercial Real Estate Loans [Member] | Substandard [Member]
Loans	26,545	32,129
Residential First Mortgage Loans [Member]
Loans	163,090	170,374	181,386
Residential First Mortgage Loans [Member] | Performing Financing Receivable [Member]
Loans	162,569	169,896
Residential First Mortgage Loans [Member] | Nonperforming Financing Receivable [Member]
Loans	521	478
Residential First Mortgage Loans [Member] | Classified Loans By Payment Activity [Member]
Loans	163,090	170,374
Residential Rentals Loans [Member]
Loans	127,469	110,228	103,361
Residential Rentals Loans [Member] | Unrated [Member]
Loans	30,827	28,428
Residential Rentals Loans [Member] | Pass [Member]
Loans	95,246	80,279
Residential Rentals Loans [Member] | Substandard [Member]
Loans	1,396	1,521
Construction And Land Development Loans [Member]
Loans	28,647	27,871	32,603
Construction And Land Development Loans [Member] | Unrated [Member]
Loans	2,175	1,775
Construction And Land Development Loans [Member] | Pass [Member]
Loans	25,471	25,367
Construction And Land Development Loans [Member] | Special Mention [Member]
Loans	272
Construction And Land Development Loans [Member] | Substandard [Member]
Loans	729	729
Home Equity And Second Mortgage Loans [Member]
Loans	37,026	21,351	20,847
Home Equity And Second Mortgage Loans [Member] | Performing Financing Receivable [Member]
Loans	36,990	21,217
Home Equity And Second Mortgage Loans [Member] | Nonperforming Financing Receivable [Member]
Loans	36	134
Home Equity And Second Mortgage Loans [Member] | Classified Loans By Payment Activity [Member]
Loans	37,026	21,351
Commercial Loans [Member]
Loans	57,519	56,417	55,023
Commercial Loans [Member] | Unrated [Member]
Loans	14,441	14,356
Commercial Loans [Member] | Pass [Member]
Loans	40,296	39,118
Commercial Loans [Member] | Substandard [Member]
Loans	2,782	2,943
Consumer Loans [Member]
Loans	801	573	412
Consumer Loans [Member] | Performing Financing Receivable [Member]
Loans	801	573
Consumer Loans [Member] | Classified Loans By Payment Activity [Member]
Loans	801	573
Commercial Equipment Loans [Member]
Loans	47,418	35,916	$ 34,589
Commercial Equipment Loans [Member] | Unrated [Member]
Loans	12,273	10,856
Commercial Equipment Loans [Member] | Pass [Member]
Loans	33,544	23,581
Commercial Equipment Loans [Member] | Substandard [Member]
Loans	1,498	1,479
Commercial Equipment Loans [Member] | Doubtful [Member]
Loans	103
Commercial Portfolio Segment [Member]
Loans	1,089,498	957,746
Commercial Portfolio Segment [Member] | Unrated [Member]
Loans	135,632	130,996
Commercial Portfolio Segment [Member] | Pass [Member]
Loans	919,959	787,949
Commercial Portfolio Segment [Member] | Special Mention [Member]
Loans	854
Commercial Portfolio Segment [Member] | Substandard [Member]
Loans	32,950	38,801
Commercial Portfolio Segment [Member] | Doubtful [Member]
Loans	103
Non Commercial Portfolio Segment [Member]
Loans	200,917	192,298
Non Commercial Portfolio Segment [Member] | Unrated [Member]
Loans	148,482	152,616
Non Commercial Portfolio Segment [Member] | Pass [Member]
Loans	50,826	38,081
Non Commercial Portfolio Segment [Member] | Special Mention [Member]
Loans		96
Non Commercial Portfolio Segment [Member] | Substandard [Member]
Loans	$ 1,609	$ 1,505