Loans and Allowance for Loan Losses (Policies)	12 Months Ended
Loans and Allowance for Loan Losses (Policies)	Dec. 31, 2012
Loans and Allowance for Loan Losses [Abstract]
Impairment of Loans	Authoritative accounting guidance requires that the impairment of loans that have been separately identified as impaired is to be measured based on the present value of expected future cash flows or, alternatively, the observable market price of the loans or the fair value of the collateral. However, for those loans that are collateral dependent (that is, if repayment of those loans is expected to be provided solely by the underlying collateral) and for which management has determined foreclosure is probable, the measure of impairment is to be based on the net realizable value of the collateral. Authoritative accounting guidance also requires certain disclosures about investments in impaired loans and the allowance for loan losses and interest income recognized on loans. A loan is considered impaired when it is probable that the Bank will be unable to collect all principal and interest amounts according to the contractual terms of the loan agreement. Factors involved in determining impairment include, but are not limited to, expected future cash flows, financial condition of the borrower, and the current economic conditions. A performing loan may be considered impaired if the factors above indicate a need for impairment. A loan on non-accrual status may not be impaired if it is in the process of collection or if the shortfall in payment is insignificant. A delay of less than 30 days or a shortfall of less than 5% of the required principal and interest payments generally is considered "insignificant" and would not indicate an impairment situation, if in management's judgment the loan will be paid in full. Loans that meet the regulatory definitions of doubtful or loss generally qualify as impaired loans under authoritative accounting guidance. As is the case for all loans, charge-offs for impaired loans occur when the loan or portion of the loan is determined to be uncollectible.

Disclosure of accounting policy for estimating the allowance for losses on loans and lease receivables. The disclosure may include (a) how the entity determines each element of the allowance, (b) which loans are evaluated individually and which loans are evaluated as a group, (c) how the entity determines both the allocated and unallocated portions of the allowance, (d) how the entity determines the loss factors applied to graded loans in order to develop a general allowance, and (e) what self-correcting mechanism the entity uses to reduce differences between estimated and actual losses.

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