Loans (Past Due Financing Receivables) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Past Due	$ 6,472	$ 12,244
Total Loan Receivables	1,363,176	1,346,922	$ 1,279,655
31 - 60 Days [Member]
Past Due	771	305
61 - 89 Days [Member]
Past Due		829
90 or Greater Days [Member]
Past Due	5,701	11,110
Commercial Real Estate Portfolio Segment [Member]
Past Due	4,387	9,151
Total Loan Receivables	891,165	878,016	817,576
Commercial Real Estate Portfolio Segment [Member] | 31 - 60 Days [Member]
Past Due	364
Commercial Real Estate Portfolio Segment [Member] | 61 - 89 Days [Member]
Past Due		677
Commercial Real Estate Portfolio Segment [Member] | 90 or Greater Days [Member]
Past Due	4,023	8,474
Residential First Mortgages Portfolio Segment [Member]
Past Due	150	212
Total Loan Receivables	156,653	156,709	166,390
Residential First Mortgages Portfolio Segment [Member] | 61 - 89 Days [Member]
Past Due		66
Residential First Mortgages Portfolio Segment [Member] | 90 or Greater Days [Member]
Past Due	150	146
Residential Rentals Portfolio Segment [Member]
Past Due	257	313
Total Loan Receivables	124,518	124,298	129,026
Residential Rentals Portfolio Segment [Member] | 31 - 60 Days [Member]
Past Due	12	13
Residential Rentals Portfolio Segment [Member] | 61 - 89 Days [Member]
Past Due		53
Residential Rentals Portfolio Segment [Member] | 90 or Greater Days [Member]
Past Due	245	247
Construction And Land Development Portfolio Segment [Member]
Total Loan Receivables	32,798	29,705	28,226
Home Equity And Second Mortgage Loans [Member]
Past Due	453	413
Total Loan Receivables	36,746	35,561	39,481
Home Equity And Second Mortgage Loans [Member] | 31 - 60 Days [Member]
Past Due	260	266
Home Equity And Second Mortgage Loans [Member] | 90 or Greater Days [Member]
Past Due	193	147
Commercial Portfolio Segment [Member]
Past Due	919	866
Total Loan Receivables	70,725	71,680	52,198
Commercial Portfolio Segment [Member] | 31 - 60 Days [Member]
Past Due	90
Commercial Portfolio Segment [Member] | 90 or Greater Days [Member]
Past Due	829	866
Consumer Portfolio Segment [Member]
Past Due	1	5
Total Loan Receivables	851	751	853
Consumer Portfolio Segment [Member] | 31 - 60 Days [Member]
Past Due	1	1
Consumer Portfolio Segment [Member] | 61 - 89 Days [Member]
Past Due		4
Commercial Equipment Portfolio Segment [Member]
Past Due	305	1,284
Total Loan Receivables	49,720	50,202	45,905
Commercial Equipment Portfolio Segment [Member] | 31 - 60 Days [Member]
Past Due	44	25
Commercial Equipment Portfolio Segment [Member] | 61 - 89 Days [Member]
Past Due		29
Commercial Equipment Portfolio Segment [Member] | 90 or Greater Days [Member]
Past Due	261	1,230
PCI Loans [Member]
Current	3,227	3,220
Total Loan Receivables	3,227	3,220	3,871
PCI Loans [Member] | Commercial Real Estate Portfolio Segment [Member]
Current	1,750	1,785
Total Loan Receivables	1,750	1,785	1,537
PCI Loans [Member] | Residential First Mortgages Portfolio Segment [Member]
Current	468	466
Total Loan Receivables	468	466
PCI Loans [Member] | Residential Rentals Portfolio Segment [Member]
Current	886	897
Total Loan Receivables	886	897	1,756
PCI Loans [Member] | Construction And Land Development Portfolio Segment [Member]
Total Loan Receivables			110
PCI Loans [Member] | Home Equity And Second Mortgage Loans [Member]
Current	123	72
Total Loan Receivables	123	72	$ 468
All Other Loans [Member]
Current	1,353,477	1,331,458
Total Loan Receivables	1,359,949	1,343,702
All Other Loans [Member] | Commercial Real Estate Portfolio Segment [Member]
Current	885,028	867,080
Total Loan Receivables	889,415	876,231
All Other Loans [Member] | Residential First Mortgages Portfolio Segment [Member]
Current	156,035	156,031
Total Loan Receivables	156,185	156,243
All Other Loans [Member] | Residential Rentals Portfolio Segment [Member]
Current	123,375	123,088
Total Loan Receivables	123,632	123,401
All Other Loans [Member] | Construction And Land Development Portfolio Segment [Member]
Current	32,798	29,705
Total Loan Receivables	32,798	29,705
All Other Loans [Member] | Home Equity And Second Mortgage Loans [Member]
Current	36,170	35,076
All Other Loans [Member] | Commercial Portfolio Segment [Member]
Current	69,806	70,814
Total Loan Receivables	70,725	71,680
All Other Loans [Member] | Consumer Portfolio Segment [Member]
Current	850	746
Total Loan Receivables	851	751
All Other Loans [Member] | Commercial Equipment Portfolio Segment [Member]
Current	49,415	48,918
Total Loan Receivables	$ 49,720	$ 50,202