Allowance for Loan Losses (Details 4) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012 FinancingReceivable Loan	Dec. 31, 2011 Loan
Troubled Debt Restructuring
Number	43,000	110,000
Pre-mod outstanding principal balance	$ 7,098	$ 27,732
Post-mod outstanding principal balance	7,393	28,198
Financial impact due to TDR taken as additional provision	578	352
Number that defaulted during the period	28,000	20,000
Recorded investment of TDRs that defaulted during the period	11,915	5,139
Financial Impact due to the default of previous TDR taken as charge-offs or additional provisions	36	98
RE Mortgage [Member] | Residential [Member]
Troubled Debt Restructuring
Number	4,000	14,000
Pre-mod outstanding principal balance	822	2,403
Post-mod outstanding principal balance	842	2,524
Financial impact due to TDR taken as additional provision	(11)
Number that defaulted during the period	1,000	3,000
Recorded investment of TDRs that defaulted during the period	112	393
Financial Impact due to the default of previous TDR taken as charge-offs or additional provisions		(1)
RE Mortgage [Member] | Commercial [Member]
Troubled Debt Restructuring
Number	15,000	37,000
Pre-mod outstanding principal balance	3,220	15,394
Post-mod outstanding principal balance	3,402	15,514
Financial impact due to TDR taken as additional provision	212	258
Number that defaulted during the period	13,000	5,000
Recorded investment of TDRs that defaulted during the period	8,904	917
Financial Impact due to the default of previous TDR taken as charge-offs or additional provisions		50
Home Equity Lines [Member]
Troubled Debt Restructuring
Number	11,000	14,000
Pre-mod outstanding principal balance	1,598	2,261
Post-mod outstanding principal balance	1,678	2,377
Financial impact due to TDR taken as additional provision	60	29
Number that defaulted during the period	5,000
Recorded investment of TDRs that defaulted during the period	500
Financial Impact due to the default of previous TDR taken as charge-offs or additional provisions	(13)
Home Equity Loans [Member]
Troubled Debt Restructuring
Number		4,000
Pre-mod outstanding principal balance		457
Post-mod outstanding principal balance		481
Number that defaulted during the period	1,000
Recorded investment of TDRs that defaulted during the period	46
Financial Impact due to the default of previous TDR taken as charge-offs or additional provisions	(1)
Auto indirect [Member]
Troubled Debt Restructuring
Number		2,000
Pre-mod outstanding principal balance		40
Post-mod outstanding principal balance		40
Financial impact due to TDR taken as additional provision
Number that defaulted during the period		4,000
Recorded investment of TDRs that defaulted during the period		301
Financial Impact due to the default of previous TDR taken as charge-offs or additional provisions
Other Consumer [Member]
Troubled Debt Restructuring
Number	1,000
Pre-mod outstanding principal balance	38
Post-mod outstanding principal balance	38
Financial impact due to TDR taken as additional provision
Number that defaulted during the period
Recorded investment of TDRs that defaulted during the period
Financial Impact due to the default of previous TDR taken as charge-offs or additional provisions
C&I [Member]
Troubled Debt Restructuring
Number	9,000	30,000
Pre-mod outstanding principal balance	1,105	5,222
Post-mod outstanding principal balance	1,105	5,312
Financial impact due to TDR taken as additional provision	317	57
Number that defaulted during the period	3,000	6,000
Recorded investment of TDRs that defaulted during the period	1,238	720
Financial Impact due to the default of previous TDR taken as charge-offs or additional provisions	50	49
Construction [Member] | Residential [Member]
Troubled Debt Restructuring
Number	3,000	5,000
Pre-mod outstanding principal balance	317	1,421
Post-mod outstanding principal balance	328	1,416
Financial impact due to TDR taken as additional provision		7
Number that defaulted during the period	2,000	2,000
Recorded investment of TDRs that defaulted during the period	139	2,808
Construction [Member] | Commercial [Member]
Troubled Debt Restructuring
Number		4,000
Pre-mod outstanding principal balance		534
Post-mod outstanding principal balance		534
Number that defaulted during the period	3,000
Recorded investment of TDRs that defaulted during the period	$ 256