Loans (Schedule of Financing Receivable Recorded Investment Credit Quality Indicator) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 1,415,417	$ 1,346,922	$ 1,307,737
Unrated [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	344,850	333,349
Pass [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	1,043,596	981,347
Substandard [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	26,971	32,226
Commercial Real Estate Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	932,344	878,016	847,945
Commercial Real Estate Portfolio Segment [Member] | Unrated [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	103,996	112,280
Commercial Real Estate Portfolio Segment [Member] | Pass [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	806,267	741,037
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	22,081	24,699
Construction And Land Development Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	30,774	29,705	28,788
Construction And Land Development Portfolio Segment [Member] | Unrated [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	1,654	2,172
Construction And Land Development Portfolio Segment [Member] | Pass [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	29,120	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	121,170	124,298	125,383
Residential Rentals Portfolio Segment [Member] | Unrated [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	39,187	37,478
Residential Rentals Portfolio Segment [Member] | Pass [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	81,317	85,551
Residential Rentals Portfolio Segment [Member] | Substandard [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	666	1,269
Commercial Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	69,179	71,680	62,083
Commercial Portfolio Segment [Member] | Unrated [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	17,792	19,157
Commercial Portfolio Segment [Member] | Pass [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	48,758	49,828
Commercial Portfolio Segment [Member] | Substandard [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	2,629	2,695
Commercial Equipment Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	61,104	50,202	49,883
Commercial Equipment Portfolio Segment [Member] | Unrated [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	24,390	15,373
Commercial Equipment Portfolio Segment [Member] | Pass [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	36,504	33,685
Commercial Equipment Portfolio Segment [Member] | Substandard [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	210	1,144
Total Commercial Portfolios [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	1,214,571	1,153,901
Total Commercial Portfolios [Member] | Unrated [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	187,019	186,460
Total Commercial Portfolios [Member] | Pass [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	1,001,966	936,906
Total Commercial Portfolios [Member] | Substandard [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	25,586	30,535
Non Commercial Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	200,846	193,021
Non Commercial Portfolio Segment [Member] | Unrated [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	157,831	146,889
Non Commercial Portfolio Segment [Member] | Pass [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	41,630	44,441
Non Commercial Portfolio Segment [Member] | Substandard [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	1,385	1,691
Residential First Mortgages Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	163,727	156,709	156,565
Residential First Mortgages Portfolio Segment [Member] | Performing Financial Instruments [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	163,581	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	36,182	35,561	36,360
Home Equity And Second Mortgage Loans [Member] | Performing Financial Instruments [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	35,972	35,414
Home Equity And Second Mortgage Loans [Member] | Nonperforming Financial Instruments [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	210	147
Consumer Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	937	751	$ 730
Consumer Portfolio Segment [Member] | Performing Financial Instruments [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 937	$ 751