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Note 5 - Loans (Detail) - Troubled Debt Restructuring by Type of Concession and Type of Loans (USD $) | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | ---
Accruing TDRs | $ 144,695,000 | $ 120,016,000
Accruing Troubled Debt Restructuring Member | Principal Deferral [Member] | Commercial Loans Member |  |
Accruing TDRs | 531,000 | 12,933,000
Accruing Troubled Debt Restructuring Member | Principal Deferral [Member] | Real Estate Construction Loans [Member] |  |
Accruing TDRs |  | 16,820,000
Accruing Troubled Debt Restructuring Member | Principal Deferral [Member] | Commercial Mortgage Loans [Member] |  |
Accruing TDRs | 27,003,000 | 471,000
Accruing Troubled Debt Restructuring Member | Principal Deferral [Member] | Residential Mortgage Loans [Member] |  |
Accruing TDRs | 1,461,000 | 1,294,000
Accruing Troubled Debt Restructuring Member | Principal Deferral [Member] |  |
Accruing TDRs | 28,995,000 | 31,518,000
Accruing Troubled Debt Restructuring Member | Rate Reduction [Member] | Commercial Loans Member |  |
Accruing TDRs | 3,020,000 | 1,756,000
Accruing Troubled Debt Restructuring Member | Rate Reduction [Member] | Real Estate Construction Loans [Member] |  |
Accruing TDRs |  | 9,659,000
Accruing Troubled Debt Restructuring Member | Rate Reduction [Member] | Commercial Mortgage Loans [Member] |  |
Accruing TDRs | 16,656,000 | 37,796,000
Accruing Troubled Debt Restructuring Member | Rate Reduction [Member] | Residential Mortgage Loans [Member] |  |
Accruing TDRs | 1,024,000 | 587,000
Accruing Troubled Debt Restructuring Member | Rate Reduction [Member] |  |
Accruing TDRs | 20,700,000 | 49,798,000
Accruing Troubled Debt Restructuring Member | Rate Reduction and Forgiveness of Principal [Member] | Commercial Mortgage Loans [Member] |  |
Accruing TDRs | 739,000 | 2,071,000
Accruing Troubled Debt Restructuring Member | Rate Reduction and Forgiveness of Principal [Member] |  |
Accruing TDRs | 739,000 | 2,071,000
Accruing Troubled Debt Restructuring Member | Rate Reduction and Payment Deferral [Member] | Commercial Loans Member |  |
Accruing TDRs | 413,000 | 431,000
Accruing Troubled Debt Restructuring Member | Rate Reduction and Payment Deferral [Member] | Real Estate Construction Loans [Member] |  |
Accruing TDRs | 5,834,000 | 5,776,000
Accruing Troubled Debt Restructuring Member | Rate Reduction and Payment Deferral [Member] | Commercial Mortgage Loans [Member] |  |
Accruing TDRs | 85,783,000 | 28,935,000
Accruing Troubled Debt Restructuring Member | Rate Reduction and Payment Deferral [Member] | Residential Mortgage Loans [Member] |  |
Accruing TDRs | 2,231,000 | 1,487,000
Accruing Troubled Debt Restructuring Member | Rate Reduction and Payment Deferral [Member] |  |
Accruing TDRs | 94,261,000 | 36,629,000
Commercial Loans Member |  |
Accruing TDRs | 3,964,000 | 15,120,000
Real Estate Construction Loans [Member] |  |
Accruing TDRs | 5,834,000 | 32,255,000
Commercial Mortgage Loans [Member] |  |
Accruing TDRs | 130,181,000 | 69,273,000
Residential Mortgage Loans [Member] |  |
Accruing TDRs | $ 4,716,000 | $ 3,368,000

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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
Name: | us-gaap_FinancingReceivableModificationsRecordedInvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant