Loans (Schedule of Financing Receivable Recorded Investment Credit Quality Indicator) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 1,387,186	$ 1,346,922	$ 1,290,415
Unrated [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	334,195	333,349
Pass [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	1,026,845	981,347
Substandard [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	26,146	32,226
Commercial Real Estate Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	917,948	878,016	828,445
Commercial Real Estate Portfolio Segment [Member] | Unrated [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	106,552	112,280
Commercial Real Estate Portfolio Segment [Member] | Pass [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	790,002	741,037
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	21,394	24,699
Construction And Land Development Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	35,662	29,705	28,647
Construction And Land Development Portfolio Segment [Member] | Unrated [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	2,017	2,172
Construction And Land Development Portfolio Segment [Member] | Pass [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	33,645	26,805
Construction And Land Development Portfolio Segment [Member] | Substandard [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans		728
Residential Rentals Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	121,990	124,298	127,469
Residential Rentals Portfolio Segment [Member] | Unrated [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	38,698	37,478
Residential Rentals Portfolio Segment [Member] | Pass [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	82,614	85,551
Residential Rentals Portfolio Segment [Member] | Substandard [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	678	1,269
Commercial Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	67,617	71,680	57,519
Commercial Portfolio Segment [Member] | Unrated [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	18,539	19,157
Commercial Portfolio Segment [Member] | Pass [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	46,452	49,828
Commercial Portfolio Segment [Member] | Substandard [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	2,626	2,695
Commercial Equipment Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	50,466	50,202	47,418
Commercial Equipment Portfolio Segment [Member] | Unrated [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	18,230	15,373
Commercial Equipment Portfolio Segment [Member] | Pass [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	32,018	33,685
Commercial Equipment Portfolio Segment [Member] | Substandard [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	218	1,144
Total Commercial Portfolios [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	1,193,683	1,153,901
Total Commercial Portfolios [Member] | Unrated [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	184,036	186,460
Total Commercial Portfolios [Member] | Pass [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	984,731	936,906
Total Commercial Portfolios [Member] | Substandard [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	24,916	30,535
Non Commercial Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	193,503	193,021
Non Commercial Portfolio Segment [Member] | Unrated [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	150,159	146,889
Non Commercial Portfolio Segment [Member] | Pass [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	42,114	44,441
Non Commercial Portfolio Segment [Member] | Substandard [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	1,230	1,691
Residential First Mortgages Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	156,670	156,709	163,090
Residential First Mortgages Portfolio Segment [Member] | Performing Financial Instruments [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	156,524	156,563
Residential First Mortgages Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	146	146
Home Equity And Second Mortgage Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	35,866	35,561	37,026
Home Equity And Second Mortgage Loans [Member] | Performing Financial Instruments [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	35,556	35,414
Home Equity And Second Mortgage Loans [Member] | Nonperforming Financial Instruments [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	310	147
Consumer Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	967	751	$ 801
Consumer Portfolio Segment [Member] | Performing Financial Instruments [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 967	$ 751