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Loans, Troubled Debt Restructurings Segregated by Class (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2013 Loan | Mar. 31, 2012 Loan | Dec. 31, 2012 Loan
Financing Receivable, Modifications [Line Items] |  |  |
Number of troubled debt restructuring that occurred during the period | 17 | 4 | 40
Post-modification outstanding balance | $ 8,300 | $ 1,713 | $ 8,687
Net charge-offs resulting from modification | 0 | 0 | 0
Defaulted restructured loans, number of loans | 5 | 5 |
Defaulted Restructured loans, recorded investment | 1,002 | 402 |
Commercial Construction [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of troubled debt restructuring that occurred during the period | 3 | 0 | 5
Post-modification outstanding balance | 2,110 | 0 | 557
Net charge-offs resulting from modification | 0 | 0 | 0
Defaulted restructured loans, number of loans | 2 | 0 |
Defaulted Restructured loans, recorded investment | 328 | 0 |
Commercial Secured by Real Estate [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of troubled debt restructuring that occurred during the period | 5 | 3 | 11
Post-modification outstanding balance | 605 | 1,665 | 4,506
Net charge-offs resulting from modification | 0 | 0 | 0
Defaulted restructured loans, number of loans | 2 | 3 |
Defaulted Restructured loans, recorded investment | 662 | 370 |
Commercial Other [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of troubled debt restructuring that occurred during the period | 9 | 1 | 23
Post-modification outstanding balance | 5,585 | 48 | 3,233
Net charge-offs resulting from modification | 0 | 0 | 0
Defaulted restructured loans, number of loans | 1 | 2 |
Defaulted Restructured loans, recorded investment | 12 | 32 |
Real Estate Mortgage [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of troubled debt restructuring that occurred during the period |  |  | 1
Post-modification outstanding balance |  |  | 391
Net charge-offs resulting from modification |  |  | $ 0

X
- Definition Amount of investment in financing receivables (after modification) modified by troubled debt restructurings that occurred 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 within the current reporting period and for which there was a payment default. + References No definition available. + Details
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- Definition Amount of investment related to financing receivables modified by troubled debt restructurings within the current reporting period, for which there was a payment default. + References No definition available. + Details
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- Definition Number of financing receivables that have been modified by troubled debt restructurings during the period + References No definition available. + Details
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- Details
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- Definition Reflects the amount of the write-down related to a troubled debt restructuring. + 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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