Allowance for Loan Losses (Details 4) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013 Loan	Mar. 31, 2012 Loan
Troubled debt restructuring
Number	3	15
Pre-modification out-standing principal balance	$ 257	$ 3,164
Post-modification out-standing principal balance	260	3,175
Financial Impact due to troubled debt restructure taken as additional provisions		16
Number that defaulted during the period		6
Recorded investment of TDRs that defaulted during the period		2,783
Financial Impact due to the default of previous troubled debt structure taken as charge-offs or additional provisions
RE Mortgage [Member] | Residential [Member]
Troubled debt restructuring
Number		2
Pre-modification out-standing principal balance		650
Post-modification out-standing principal balance		669
Financial Impact due to troubled debt restructure taken as additional provisions
Number that defaulted during the period		1
Recorded investment of TDRs that defaulted during the period		112
Financial Impact due to the default of previous troubled debt structure taken as charge-offs or additional provisions
RE Mortgage [Member] | Commercial [Member]
Troubled debt restructuring
Number		7
Pre-modification out-standing principal balance		1,561
Post-modification out-standing principal balance		1,523
Financial Impact due to troubled debt restructure taken as additional provisions
Number that defaulted during the period		4
Recorded investment of TDRs that defaulted during the period		2,632
Financial Impact due to the default of previous troubled debt structure taken as charge-offs or additional provisions
Home Equity Lines [Member]
Troubled debt restructuring
Number	3	2
Pre-modification out-standing principal balance	257	436
Post-modification out-standing principal balance	260	464
Financial Impact due to troubled debt restructure taken as additional provisions		16
Number that defaulted during the period
Recorded investment of TDRs that defaulted during the period
Financial Impact due to the default of previous troubled debt structure taken as charge-offs or additional provisions
Home Equity Loans [Member]
Troubled debt restructuring
Number
Pre-modification out-standing principal balance
Post-modification out-standing principal balance
Financial Impact due to troubled debt restructure taken as additional provisions
Number that defaulted during the period
Recorded investment of TDRs that defaulted during the period
Financial Impact due to the default of previous troubled debt structure taken as charge-offs or additional provisions
Auto indirect [Member]
Troubled debt restructuring
Number
Pre-modification out-standing principal balance
Post-modification out-standing principal balance
Financial Impact due to troubled debt restructure taken as additional provisions
Number that defaulted during the period
Recorded investment of TDRs that defaulted during the period
Financial Impact due to the default of previous troubled debt structure taken as charge-offs or additional provisions
Other Consumer [Member]
Troubled debt restructuring
Number		1
Pre-modification out-standing principal balance		38
Post-modification out-standing principal balance		38
Financial Impact due to troubled debt restructure taken as additional provisions
Number that defaulted during the period
Recorded investment of TDRs that defaulted during the period
Financial Impact due to the default of previous troubled debt structure taken as charge-offs or additional provisions
C&I [Member]
Troubled debt restructuring
Number		1
Pre-modification out-standing principal balance		249
Post-modification out-standing principal balance		249
Financial Impact due to troubled debt restructure taken as additional provisions
Number that defaulted during the period
Recorded investment of TDRs that defaulted during the period
Financial Impact due to the default of previous troubled debt structure taken as charge-offs or additional provisions
Construction [Member] | Residential [Member]
Troubled debt restructuring
Number		2
Pre-modification out-standing principal balance		230
Post-modification out-standing principal balance		232
Financial Impact due to troubled debt restructure taken as additional provisions
Number that defaulted during the period
Recorded investment of TDRs that defaulted during the period
Financial Impact due to the default of previous troubled debt structure taken as charge-offs or additional provisions
Construction [Member] | Commercial [Member]
Troubled debt restructuring
Number
Pre-modification out-standing principal balance
Post-modification out-standing principal balance
Financial Impact due to troubled debt restructure taken as additional provisions
Number that defaulted during the period		1
Recorded investment of TDRs that defaulted during the period		39
Financial Impact due to the default of previous troubled debt structure taken as charge-offs or additional provisions