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Allowance for Loan Losses Allowance for Loan Losses Narrative (Details) (USD $) | 3 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2013 loan | Jun. 30, 2012 loan | Jun. 30, 2013 loan | Jun. 30, 2012 loan | Mar. 31, 2013 | Dec. 31, 2012 loan | Mar. 31, 2012 | Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Less allowance for loan losses | $ 12,670,000 | $ 14,384,000 | $ 12,670,000 | $ 14,384,000 | $ 12,720,000 | $ 12,500,000 | $ 12,954,000 | $ 13,000,000
Loan value, lower range | 75.00% |  | 75.00% |  |  |  |  |
Construction loans accrual to company capital | 18.40% |  | 18.40% |  |  |  |  |
Contstructions loan portfolio maximum to company captial | 100.00% |  | 100.00% |  |  |  |  |
Construction and non owner occupied commercial real estate | 74.10% |  | 74.10% |  |  |  |  |
Construction and non owner occupied commercial real estae maximum | 300.00% |  | 300.00% |  |  |  |  |
Outstanding loans and commitments subject by independent consulting firm | 50.00% |  | 50.00% |  |  |  |  |
Residential loans typical loan to value range, high | 80.00% |  | 80.00% |  |  |  |  |
Collateralized consumer loans to individuals loan to value maximum, lower range | 80.00% |  | 80.00% |  |  |  |  |
Collateralized consumer loans to individuals loan to value maximum, higher range | 90.00% |  | 90.00% |  |  |  |  |
Number of Loans | 105 | 82 | 105 | 82 |  | 101 |  |
Balance | 30,874,000 | 24,980,000 | 30,874,000 | 24,980,000 |  | 29,955,000 |  |
Number of contracts greater than 30 days past due | 12 | 13 | 12 | 13 |  |  |  |
Recorded investment greater than 30 days past due | 2,197,000 | 2,487,000 | 2,197,000 | 2,487,000 |  |  |  |
Number of loans classified as TDR in previous 12 months | 2 | 6 | 2 | 6 |  |  |  |
Loans classified as TDR in last 12 months | 524,000 | 864,000 | 524,000 | 864,000 |  |  |  |
Number of Loans | 3 | 15 | 10 | 29 |  |  |  |
Pre-Modification Outstanding Recorded Investment | 936,000 | 5,105,000 | 3,890,000 | 8,107,000 |  |  |  |
Number of TDR loans that are involved in bankruptcy | 10 |  | 10 |  |  |  |  |
Loans classified as TDR that are involved in bankruptcy | 970,000 |  | 970,000 |  |  |  |  |
Number of loans classified as TDR that were on non accrual status | 23 |  | 23 |  |  |  |  |
Financing Receivalbe, Number of Loans Classified As Troubled Debt Restructurings Classifed As NonAccrual | 4,027,000 |  | 4,027,000 |  |  |  |  |
Number of loans classified as TDR involved in foreclosure | 5 |  | 5 |  |  |  |  |
Loans classified as TDR that are involved in Foreclosure | 450,000 |  | 450,000 |  |  |  |  |
Consumer Loan [Member] |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Deliquent period before residential loans placed on non accrual status |  |  | 120 days |  |  |  |  |
Residential Construction [Member] |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Less allowance for loan losses | 9,000 | 58,000 | 9,000 | 58,000 | 9,000 | 11,000 | 59,000 | 255,000
Deliquent period before residential loans placed on non accrual status |  |  | 90 days |  |  |  |  |
Unallocated Financing Receivables [Member] |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Less allowance for loan losses | 1,275,000 | 1,895,000 | 1,275,000 | 1,895,000 | 1,089,000 | 842,000 | 1,699,000 | 2,008,000
Number of days past due | 30 days | 30 days |  |  |  |  |  |
Unallocated Reserves [Member] |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Less allowance for loan losses | 1,275,000 | 1,895,000 | 1,275,000 | 1,895,000 |  | 842,000 |  |
Unallocated Reserves [Member] | Unallocated Financing Receivables [Member] |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Less allowance for loan losses | $ 1,275,000 | $ 1,895,000 | $ 1,275,000 | $ 1,895,000 |  | $ 842,000 |  |

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