Summary of Significant Accounting Policies (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012 security	Dec. 31, 2011 security	Dec. 31, 2010
Maturities of Time Deposits, Description	Interest-bearing time deposits with banks consist of certificates of deposits in other banks with maturities within one year to three years
Held-to-maturity securities, number of holdings	0	0
Impairment of Investments			$ 40
Net unamortized origination fees	42	83
Other real estate owned	428	427
Accrued benefit liability	738	709
Other Postretirement Benefit Expense	29	49	39
Advertising Expense	172	144	127
Share-based Compensation Expense	25	26	58
Investment in Federal Home Loan Bank Stock [Member]
Impairment of Investments	$ 0	$ 0	$ 0
Real estate - commercial [Member]
Maximum loan-to-value ratio	80.00%
Real estate - mortgage [Member]
Maximum loan-to-value ratio	80.00%
Home equity installment loans [Member]
Maximum loan-to-value ratio	80.00%
Home equity lines of credit [Member]
Maximum loan-to-value ratio	90.00%

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Maximum Loan To Value Ration

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Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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The carrying amount of the liability as of the balance sheet date to an individual under a deferred compensation arrangement. This amount may be the result of periodic accruals made over the period of active employment, or reflect termination benefits resulting contractual terms or a death benefit.

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The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

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Description of the maturities of time deposits (including certificates of deposits, individual retirement accounts and open accounts) held by the entity.

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The amount of costs recognized during the period for non-pension postretirement benefits, such as medical, dental and life insurance.

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Carrying amount as of the balance sheet date of land and buildings obtained through foreclosure proceedings or defeasance in full or partial satisfaction of a debt arrangement.

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Amount of deferred fees paid by borrowers and unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of loans that are being amortized into income as an adjustment to yield. Excludes amounts for loans and leases covered under loss sharing agreements.

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