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Note 13 - Fair Value of Financial Instruments (Detail) - Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | ---
Construction Other Real Estate Owned [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Assets and Liabilities Measured on a Nonrecurring Basis | $ 1,562 | $ 1,814
Construction Other Real Estate Owned [Member] |  |
Assets and Liabilities Measured on a Nonrecurring Basis | 1,562 |
Commercial and Industrial [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Assets and Liabilities Measured on a Nonrecurring Basis | 1,055 | 1,134
Owner Occupied [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Assets and Liabilities Measured on a Nonrecurring Basis |  | 290
Nonowner Occupied [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Assets and Liabilities Measured on a Nonrecurring Basis |  | 1,959
Construction [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Assets and Liabilities Measured on a Nonrecurring Basis |  | $ 587

X
- Definition This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a nonrecurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References No definition available. + Details
Name: | us-gaap_AssetsFairValueDisclosureNonrecurring
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant