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Allowance for Loan Losses TDR's by Class and Specific Reserve (Details) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2013 loan | Dec. 31, 2012 loan | Mar. 31, 2012 loan
--- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of Loans | 106 | 101 | 71
Balance | $ 31,147 | $ 29,955 | $ 20,647
Specific Reserves | 2,590 | 2,590 | 606
Commercial Real Estate Portfolio Segment [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of Loans | 20 | 18 | 12
Balance | 13,715 | 11,961 | 7,610
Specific Reserves | 313 | 823 | 271
Commercial Construction [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of Loans | 3 | 3 | 1
Balance | 2,317 | 3,319 | 1,148
Specific Reserves | 1,194 | 969 | 0
Commercial Other [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of Loans | 24 | 23 | 12
Balance | 3,063 | 3,074 | 1,919
Specific Reserves | 40 | 574 | 85
Residential Term [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of Loans | 54 | 53 | 46
Balance | 11,195 | 10,945 | 9,970
Specific Reserves | 1,034 | 224 | 250
Home Equity [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of Loans | 5 | 4 | 0
Balance | 857 | 656 | 0
Specific Reserves | $ 9 | $ 0 | $ 0

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- Definition Specific allowance for loan and lease losses on receivable financings that are classified as troubled debt restructurings during the period. + References No definition available. + Details
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- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953676-111524 + Details
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- Definition The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6951948&loc=d3e18845-111554 + Details
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