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Note 17 - Fair Value Disclosure Measurements (Detail) - Additional Quantitative Information About Assets Measured at Fair Value on Non-Recurring Basis (USD $)
In Thousands, unless otherwise specified

12 Months Ended

Dec. 31, 2012

Appraisal Adjustments [Member] | Minimum [Member] | Impaired Loans [Member]

Unobservable Input

20.00%

Appraisal Adjustments [Member] | Maximum [Member] | Impaired Loans [Member]

Unobservable Input

(68.00%)

Appraisal Adjustments [Member] | Impaired Loans [Member]

Estimate (in Dollars)

17,600

Valuation Techniques

Appraisal of collateral (1)

^[1]

Liquidation Expenses [Member] | Minimum [Member] | Impaired Loans [Member]

Unobservable Input

0.30%

Liquidation Expenses [Member] | Maximum [Member] | Impaired Loans [Member]

Unobservable Input

(45.80%)

Appraisal of Collateral [Member] | Other Real Estate Owned [Member]

Estimate (in Dollars)

1,846

Valuation Techniques

Appraisal of collateral (1), (3)

^[1],[2]

[1]	Fair value is generally determined through independent appraisals of the underlying collateral, which generally include various level 3 inputs which are not identifiable.
[2]	Includes qualitative adjustments by management and estimated liquidation expenses.

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

X

- Definition

Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (bbb)

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

+ Details

Name:	us-gaap_FairValueInputsDiscountRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Description of the inputs and valuation technique(s) used to measure fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (bbb)

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

+ Details

Name:	us-gaap_FairValueMeasurementsValuationTechniques
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration