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Allowance for Loan Losses (Narrative) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Mar. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Individual loan balance is classified as nonaccrual status or troubled debt restructure | $ 100
Credit reviews mandatory for loan aggregate balances with in 12-month period | 1,000
Number of consecutive historical quarters for calculation of charge-off factor | 12
Loans past due as to maturity, days | 90 days
Minimum [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Credit reviews mandatory for loan aggregate balances with in 12-month period | 250
Anticipated scope of range-of-coverage | 55.00%
Commercial [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Individual loan balance is classified as nonaccrual status or troubled debt restructure | 100
Credit reviews mandatory for loan aggregate balances with in 12-month period | $ 250
Number of consecutive historical quarters for calculation of charge-off factor | 12
Real estate-mortgage [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans past due as to maturity, days | 90 days
Consumer [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Loans past due as to maturity, days | 90 days

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