Loans and Allowance for Loan and Lease Losses (Details 6) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012 Loans	Sep. 30, 2011 Loans	Sep. 30, 2012 Loans	Sep. 30, 2011 Loans
Loans classified as troubled debt restructuring consisted primarily of interest rate concessions
Number	3	4	13	15
Recorded Balance Before Modification	$ 168	$ 523	$ 4,101	$ 1,538
Recorded Balance After Modification	168	523	4,101	1,538
Commercial Real Estate Loans [Member]
Loans classified as troubled debt restructuring consisted primarily of interest rate concessions
Number	1	1	2	1
Recorded Balance Before Modification	31	197	172	197
Recorded Balance After Modification	31	197	172	197
Residential Real Estate Loans [Member]
Loans classified as troubled debt restructuring consisted primarily of interest rate concessions
Number	1	2	5	13
Recorded Balance Before Modification	79	86	1,712	1,101
Recorded Balance After Modification	79	86	1,712	1,101
Construction Real Estate Loans [Member]
Loans classified as troubled debt restructuring consisted primarily of interest rate concessions
Number			1
Recorded Balance Before Modification			1,940
Recorded Balance After Modification			1,940
Commercial Loans and Leases [Member]
Loans classified as troubled debt restructuring consisted primarily of interest rate concessions
Number	1	1	2	1
Recorded Balance Before Modification	58	240	268	240
Recorded Balance After Modification	58	240	268	240
Municipal Loans [Member]
Loans classified as troubled debt restructuring consisted primarily of interest rate concessions
Number
Recorded Balance Before Modification
Recorded Balance After Modification
Consumer Loans [Member]
Loans classified as troubled debt restructuring consisted primarily of interest rate concessions
Number			3
Recorded Balance Before Modification			9
Recorded Balance After Modification			$ 9