Allowance for Loan Losses, Nonperforming Assets and Impaired Loans, Troubled Debt Restructurings (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2012
Financing Receivable Modifications [Abstract]
Number of Contracts	5	8
Pre-Modification Outstanding Principal Balance	$ 1,428	$ 1,595
Post-Modification Outstanding Principal Balance	1,319	1,505
Impairment Accrued	197	244
Partial charge-off on loans	109
Number of loans modified and reported as trouble debt restructurings	2
Financing Receivable Modifications Subsequent Default [Abstract]
Number of Contracts	4	4
Principal Balance	891	891
Impairment Accrued	21	21
Number of days delay beyond which restructured loans are secured by real estate, minimum (in days)		90 days
Consumer Real Estate [Member]
Financing Receivable Modifications [Abstract]
Number of loans modified and reported as trouble debt restructurings	1
Consumer Real Estate [Member] | Closed-end first liens [Member]
Financing Receivable Modifications [Abstract]
Number of Contracts	2	4
Pre-Modification Outstanding Principal Balance	201	351
Post-Modification Outstanding Principal Balance	146	310
Impairment Accrued	0	47
Financing Receivable Modifications Subsequent Default [Abstract]
Number of Contracts	2	2
Principal Balance	123	123
Impairment Accrued	0	0
Consumer Real Estate [Member] | Closed-end junior liens [Member]
Financing Receivable Modifications [Abstract]
Number of Contracts	1	1
Pre-Modification Outstanding Principal Balance	147	147
Post-Modification Outstanding Principal Balance	93	93
Impairment Accrued	0	0
Financing Receivable Modifications Subsequent Default [Abstract]
Number of Contracts	1	1
Principal Balance	93	93
Impairment Accrued	0	0
Commercial Real Estate [Member]
Financing Receivable Modifications [Abstract]
Number of loans modified and reported as trouble debt restructurings	1
Commercial Real Estate [Member] | Commercial real estate, owner occupied [Member]
Financing Receivable Modifications [Abstract]
Number of Contracts	1	2
Pre-Modification Outstanding Principal Balance	680	697
Post-Modification Outstanding Principal Balance	680	702
Impairment Accrued	21	21
Commercial Non Real Estate [Member]
Financing Receivable Modifications [Abstract]
Number of loans modified and reported as trouble debt restructurings	1
Commercial Non Real Estate [Member] | Commercial and Industrial [Member]
Financing Receivable Modifications [Abstract]
Number of Contracts	1	1
Pre-Modification Outstanding Principal Balance	400	400
Post-Modification Outstanding Principal Balance	400	400
Impairment Accrued	176	176
Financing Receivable Modifications Subsequent Default [Abstract]
Number of Contracts	1	1
Principal Balance	675	675
Impairment Accrued	$ 21	$ 21