Loans Loan Categories and Past Due Loans(Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, Past Due	$ 12,016	$ 13,468	$ 11,875
Current Loans	1,467,654	1,399,800	1,332,249
Loans and Leases Receivable, Gross	1,479,670	1,413,268	1,344,124
Loans 90 Days or More Past Due and Still Accruing Interest	1,570	537	1,325
Nonaccrual Loans	6,931	6,899	6,185
Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, Past Due	3,729	5,205	3,377
Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, Past Due	2,264	2,881	3,276
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, Past Due	6,023	5,382	5,222
Commercial [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, Past Due	577	623	895
Current Loans	94,756	98,888	92,995
Loans and Leases Receivable, Gross	95,333	99,511	93,890
Loans 90 Days or More Past Due and Still Accruing Interest	0	0	0
Nonaccrual Loans	513	473	164
Commercial [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, Past Due	109	124	212
Commercial [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, Past Due	86	154	575
Commercial [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, Past Due	382	345	108
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, Past Due	2,600	2,271	2,330
Current Loans	351,195	337,841	337,018
Loans and Leases Receivable, Gross	353,795	340,112	339,348
Loans 90 Days or More Past Due and Still Accruing Interest	883	0	51
Nonaccrual Loans	1,777	2,071	2,079
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, Past Due	0	432	0
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, Past Due	0	7	443
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, Past Due	2,600	1,832	1,887
Consumer Loans Financing [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, Past Due	4,666	5,598	3,815
Current Loans	450,213	431,443	413,349
Loans and Leases Receivable, Gross	454,879	437,041	417,164
Loans 90 Days or More Past Due and Still Accruing Interest	21	0	5
Nonaccrual Loans	417	415	473
Consumer Loans Financing [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, Past Due	3,355	4,167	2,726
Consumer Loans Financing [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, Past Due	1,116	1,225	817
Consumer Loans Financing [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, Past Due	195	206	272
Residential [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, Past Due	4,173	4,976	4,835
Current Loans	571,490	531,628	488,887
Loans and Leases Receivable, Gross	575,663	536,604	493,722
Loans 90 Days or More Past Due and Still Accruing Interest	666	537	1,269
Nonaccrual Loans	4,224	3,940	3,469
Residential [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, Past Due	265	482	439
Residential [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, Past Due	1,062	1,495	1,441
Residential [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing Receivable, Recorded Investment, Past Due	$ 2,846	$ 2,999	$ 2,955