Note 3 - Loans and Allowance for Loan Losses (Detail) - Allowance For Loan Losses And The Recorded Investment In Loans By Portfolio Segment (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Total ending allowance balance			$ 28,784	$ 23,364
Ending loan balance	1,004,995	1,072,108
Real Estate Loans [Member]
Individually evaluated for impairment	4,732	1,737
Collectively evaluated for impairment	17,522	21,801
Total ending allowance balance	22,254	23,538
Loans individually evaluated for impairment	63,351	134,800
Loans collectively evaluated for impairment	833,342	814,984
Ending loan balance	896,693	949,784
Commercial Portfolio Segment [Member]
Individually evaluated for impairment	198	159
Collectively evaluated for impairment	1,315	3,349
Total ending allowance balance	1,513	3,508
Loans individually evaluated for impairment	207	3,438
Loans collectively evaluated for impairment	89,848	97,521
Ending loan balance	90,055	100,959
Consumer Portfolio Segment [Member]
Individually evaluated for impairment	213	30
Collectively evaluated for impairment	465	1,188
Total ending allowance balance	678	1,218
Loans individually evaluated for impairment	331	79
Loans collectively evaluated for impairment	17,916	21,286
Ending loan balance	18,247	21,365
Total [Member]
Individually evaluated for impairment	5,143	1,926
Collectively evaluated for impairment	19,302	26,338
Total ending allowance balance	24,445	28,264
Loans individually evaluated for impairment	63,889	138,317
Loans collectively evaluated for impairment	941,106	933,791
Ending loan balance	$ 1,004,995	$ 1,072,108

A valuation allowance for financing receivables that are expected to be uncollectible.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (c)(1)

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The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

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-Paragraph 11B

-Subparagraph (g)

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The balance of financing receivables that were collectively evaluated for impairment.

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-Publisher FASB

-Name Accounting Standards Codification

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

-Publisher FASB

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- Definition

Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

+ References

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

-Publisher OTS

-Name Federal Regulation (FR)

-Number Title 12

-Section 563c.102

-Paragraph 8

-Subparagraph e

-Chapter V

-Subsection I

-LegacyDoc This is a non-GAAP reference that was included in the 2009 taxonomy. It will be removed from future versions of this taxonomy.

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-Publisher AICPA

-Name Audit and Accounting Guide (AAG)

-Number AAG-DEP

-Paragraph 116

-IssueDate 2006-05-01

-Chapter 8

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Name Statement of Position (SOP)

-Number 01-6

-Paragraph 13

-Subparagraph e

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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