Loans and Allowance For Loan Losses (Details 5) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2011
Summary of recorded investment based on delinquency status
Total Loans	$ 867,459	$ 843,088	$ 830,312
Commercial Real Estate [Member]
Summary of recorded investment based on delinquency status
Total Loans	398,251	381,852	386,891
Commercial [Member]
Summary of recorded investment based on delinquency status
Total Loans	79,461	76,570	72,679
Residential Real Estate [Member]
Summary of recorded investment based on delinquency status
Total Loans	64,834	64,524	68,837
Home Equity Loans [Member]
Summary of recorded investment based on delinquency status
Total Loans	126,568	126,958	130,143
Home Equity Loans [Member] | Grade 9-Loss [Member]
Summary of recorded investment based on delinquency status
Total Loans
Indirect [Member]
Summary of recorded investment based on delinquency status
Total Loans	184,892	180,089	158,885
Indirect [Member] | Grade 9-Loss [Member]
Summary of recorded investment based on delinquency status
Total Loans
Consumer [Member]
Summary of recorded investment based on delinquency status
Total Loans	13,453	13,095	12,877
Consumer [Member] | Grade 9-Loss [Member]
Summary of recorded investment based on delinquency status
Total Loans
Commercial Credit Exposure [Member]
Summary of recorded investment based on delinquency status
Total Loans	867,459	843,088
Total Pass Credits	439,125	402,037
Total loans internally credit risk graded	484,204	465,481
Total loans not internally credit risk graded	383,255	377,607
Commercial Credit Exposure [Member] | Grade 1-Minimal [Member]
Summary of recorded investment based on delinquency status
Total Loans	110	3,157
Commercial Credit Exposure [Member] | Grade 2-Modest [Member]
Summary of recorded investment based on delinquency status
Total Loans
Commercial Credit Exposure [Member] | Grade 3-Better Than Average [Member]
Summary of recorded investment based on delinquency status
Total Loans	1,579	1,621
Commercial Credit Exposure [Member] | Grade 4-Average [Member]
Summary of recorded investment based on delinquency status
Total Loans	43,264	50,086
Commercial Credit Exposure [Member] | Grade 5-Acceptable [Member]
Summary of recorded investment based on delinquency status
Total Loans	394,172	347,173
Commercial Credit Exposure [Member] | Grade 6-Special mention [Member]
Summary of recorded investment based on delinquency status
Total Loans	9,477	19,494
Commercial Credit Exposure [Member] | Grade 7-Substandard [Member]
Summary of recorded investment based on delinquency status
Total Loans	34,837	43,950
Commercial Credit Exposure [Member] | Grade 8-Doubtful [Member]
Summary of recorded investment based on delinquency status
Total Loans	765
Commercial Credit Exposure [Member] | Grade 9-Loss [Member]
Summary of recorded investment based on delinquency status
Total Loans
Commercial Credit Exposure [Member] | 1-29 days Past Due [Member]
Summary of recorded investment based on delinquency status
Total Loans	376,208	368,599
Commercial Credit Exposure [Member] | 30-59 days Past Due [Member]
Summary of recorded investment based on delinquency status
Total Loans	2,426	3,282
Commercial Credit Exposure [Member] | 60-89 days Past Due [Member]
Summary of recorded investment based on delinquency status
Total Loans	1,139	1,436
Commercial Credit Exposure [Member] | 90 days and more Past Due [Member]
Summary of recorded investment based on delinquency status
Total Loans	3,482	4,290
Commercial Credit Exposure [Member] | Commercial Real Estate [Member]
Summary of recorded investment based on delinquency status
Total Loans	398,251	381,852
Total Pass Credits	359,021	324,587
Total loans internally credit risk graded	398,251	381,852
Commercial Credit Exposure [Member] | Commercial Real Estate [Member] | Grade 2-Modest [Member]
Summary of recorded investment based on delinquency status
Total Loans
Commercial Credit Exposure [Member] | Commercial Real Estate [Member] | Grade 3-Better Than Average [Member]
Summary of recorded investment based on delinquency status
Total Loans	1,566	1,602
Commercial Credit Exposure [Member] | Commercial Real Estate [Member] | Grade 4-Average [Member]
Summary of recorded investment based on delinquency status
Total Loans	38,195	44,527
Commercial Credit Exposure [Member] | Commercial Real Estate [Member] | Grade 5-Acceptable [Member]
Summary of recorded investment based on delinquency status
Total Loans	319,260	278,458
Commercial Credit Exposure [Member] | Commercial Real Estate [Member] | Grade 6-Special mention [Member]
Summary of recorded investment based on delinquency status
Total Loans	5,789	16,390
Commercial Credit Exposure [Member] | Commercial Real Estate [Member] | Grade 7-Substandard [Member]
Summary of recorded investment based on delinquency status
Total Loans	32,676	40,875
Commercial Credit Exposure [Member] | Commercial Real Estate [Member] | Grade 8-Doubtful [Member]
Summary of recorded investment based on delinquency status
Total Loans	765
Commercial Credit Exposure [Member] | Commercial Real Estate [Member] | Grade 9-Loss [Member]
Summary of recorded investment based on delinquency status
Total Loans
Commercial Credit Exposure [Member] | Commercial [Member]
Summary of recorded investment based on delinquency status
Total Loans	79,461	76,570
Total Pass Credits	75,191	72,378
Total loans internally credit risk graded	79,461	76,570
Commercial Credit Exposure [Member] | Commercial [Member] | Grade 1-Minimal [Member]
Summary of recorded investment based on delinquency status
Total Loans	110	3,157
Commercial Credit Exposure [Member] | Commercial [Member] | Grade 2-Modest [Member]
Summary of recorded investment based on delinquency status
Total Loans
Commercial Credit Exposure [Member] | Commercial [Member] | Grade 3-Better Than Average [Member]
Summary of recorded investment based on delinquency status
Total Loans	13	19
Commercial Credit Exposure [Member] | Commercial [Member] | Grade 4-Average [Member]
Summary of recorded investment based on delinquency status
Total Loans	4,837	5,322
Commercial Credit Exposure [Member] | Commercial [Member] | Grade 5-Acceptable [Member]
Summary of recorded investment based on delinquency status
Total Loans	70,231	63,880
Commercial Credit Exposure [Member] | Commercial [Member] | Grade 6-Special mention [Member]
Summary of recorded investment based on delinquency status
Total Loans	3,642	2,947
Commercial Credit Exposure [Member] | Commercial [Member] | Grade 7-Substandard [Member]
Summary of recorded investment based on delinquency status
Total Loans	628	1,245
Commercial Credit Exposure [Member] | Commercial [Member] | Grade 8-Doubtful [Member]
Summary of recorded investment based on delinquency status
Total Loans
Commercial Credit Exposure [Member] | Commercial [Member] | Grade 9-Loss [Member]
Summary of recorded investment based on delinquency status
Total Loans
Commercial Credit Exposure [Member] | Residential Real Estate [Member]
Summary of recorded investment based on delinquency status
Total Loans	64,834	64,524
Total Pass Credits	4,913	5,072
Total loans internally credit risk graded	6,492	7,059
Total loans not internally credit risk graded	58,342	57,465
Commercial Credit Exposure [Member] | Residential Real Estate [Member] | Grade 2-Modest [Member]
Summary of recorded investment based on delinquency status
Total Loans
Commercial Credit Exposure [Member] | Residential Real Estate [Member] | Grade 4-Average [Member]
Summary of recorded investment based on delinquency status
Total Loans	232	237
Commercial Credit Exposure [Member] | Residential Real Estate [Member] | Grade 5-Acceptable [Member]
Summary of recorded investment based on delinquency status
Total Loans	4,681	4,835
Commercial Credit Exposure [Member] | Residential Real Estate [Member] | Grade 6-Special mention [Member]
Summary of recorded investment based on delinquency status
Total Loans	46	157
Commercial Credit Exposure [Member] | Residential Real Estate [Member] | Grade 7-Substandard [Member]
Summary of recorded investment based on delinquency status
Total Loans	1,533	1,830
Commercial Credit Exposure [Member] | Residential Real Estate [Member] | Grade 8-Doubtful [Member]
Summary of recorded investment based on delinquency status
Total Loans
Commercial Credit Exposure [Member] | Residential Real Estate [Member] | Grade 9-Loss [Member]
Summary of recorded investment based on delinquency status
Total Loans
Commercial Credit Exposure [Member] | Residential Real Estate [Member] | 1-29 days Past Due [Member]
Summary of recorded investment based on delinquency status
Total Loans	55,181	53,276
Commercial Credit Exposure [Member] | Residential Real Estate [Member] | 30-59 days Past Due [Member]
Summary of recorded investment based on delinquency status
Total Loans	506	545
Commercial Credit Exposure [Member] | Residential Real Estate [Member] | 60-89 days Past Due [Member]
Summary of recorded investment based on delinquency status
Total Loans	608	1,172
Commercial Credit Exposure [Member] | Residential Real Estate [Member] | 90 days and more Past Due [Member]
Summary of recorded investment based on delinquency status
Total Loans	2,047	2,472
Commercial Credit Exposure [Member] | Home Equity Loans [Member]
Summary of recorded investment based on delinquency status
Total Loans	126,568	126,958
Total loans not internally credit risk graded	126,568	126,958
Commercial Credit Exposure [Member] | Home Equity Loans [Member] | Grade 2-Modest [Member]
Summary of recorded investment based on delinquency status
Total Loans
Commercial Credit Exposure [Member] | Home Equity Loans [Member] | Grade 8-Doubtful [Member]
Summary of recorded investment based on delinquency status
Total Loans
Commercial Credit Exposure [Member] | Home Equity Loans [Member] | Grade 9-Loss [Member]
Summary of recorded investment based on delinquency status
Total Loans
Commercial Credit Exposure [Member] | Home Equity Loans [Member] | 1-29 days Past Due [Member]
Summary of recorded investment based on delinquency status
Total Loans	123,568	123,169
Commercial Credit Exposure [Member] | Home Equity Loans [Member] | 30-59 days Past Due [Member]
Summary of recorded investment based on delinquency status
Total Loans	1,342	1,942
Commercial Credit Exposure [Member] | Home Equity Loans [Member] | 60-89 days Past Due [Member]
Summary of recorded investment based on delinquency status
Total Loans	272	181
Commercial Credit Exposure [Member] | Home Equity Loans [Member] | 90 days and more Past Due [Member]
Summary of recorded investment based on delinquency status
Total Loans	1,386	1,666
Commercial Credit Exposure [Member] | Indirect [Member]
Summary of recorded investment based on delinquency status
Total Loans	184,892	180,089
Total loans not internally credit risk graded	184,892	180,089
Commercial Credit Exposure [Member] | Indirect [Member] | Grade 2-Modest [Member]
Summary of recorded investment based on delinquency status
Total Loans
Commercial Credit Exposure [Member] | Indirect [Member] | Grade 8-Doubtful [Member]
Summary of recorded investment based on delinquency status
Total Loans
Commercial Credit Exposure [Member] | Indirect [Member] | Grade 9-Loss [Member]
Summary of recorded investment based on delinquency status
Total Loans
Commercial Credit Exposure [Member] | Indirect [Member] | 1-29 days Past Due [Member]
Summary of recorded investment based on delinquency status
Total Loans	184,273	179,230
Commercial Credit Exposure [Member] | Indirect [Member] | 30-59 days Past Due [Member]
Summary of recorded investment based on delinquency status
Total Loans	518	664
Commercial Credit Exposure [Member] | Indirect [Member] | 60-89 days Past Due [Member]
Summary of recorded investment based on delinquency status
Total Loans	96	71
Commercial Credit Exposure [Member] | Indirect [Member] | 90 days and more Past Due [Member]
Summary of recorded investment based on delinquency status
Total Loans	5	124
Commercial Credit Exposure [Member] | Consumer [Member]
Summary of recorded investment based on delinquency status
Total Loans	13,453	13,095
Total loans not internally credit risk graded	13,453	13,095
Commercial Credit Exposure [Member] | Consumer [Member] | Grade 2-Modest [Member]
Summary of recorded investment based on delinquency status
Total Loans
Commercial Credit Exposure [Member] | Consumer [Member] | Grade 8-Doubtful [Member]
Summary of recorded investment based on delinquency status
Total Loans
Commercial Credit Exposure [Member] | Consumer [Member] | Grade 9-Loss [Member]
Summary of recorded investment based on delinquency status
Total Loans
Commercial Credit Exposure [Member] | Consumer [Member] | 1-29 days Past Due [Member]
Summary of recorded investment based on delinquency status
Total Loans	13,186	12,924
Commercial Credit Exposure [Member] | Consumer [Member] | 30-59 days Past Due [Member]
Summary of recorded investment based on delinquency status
Total Loans	60	131
Commercial Credit Exposure [Member] | Consumer [Member] | 60-89 days Past Due [Member]
Summary of recorded investment based on delinquency status
Total Loans	163	12
Commercial Credit Exposure [Member] | Consumer [Member] | 90 days and more Past Due [Member]
Summary of recorded investment based on delinquency status
Total Loans	$ 44	$ 28