Note 3 - Loans and Allowance for Loan Losses (Detail) - Components of Domestic Loans Held For Sale and Loans Held in Portfolio (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Real estate—residential mortgage	$ 75,857	$ 121,237
Loans held in portfolio, net of unearned discounts	1,697,335	1,666,598
Less unearned discounts	16,946	16,845
Loans held in portfolio, net of unearned discounts	1,680,389	1,649,753
	1,756,246	1,770,990
Commercial and Industrial [Member]
Loans held in portfolio, net of unearned discounts	637,807	629,369
Loans held in portfolio, net of unearned discounts	635,817	627,785
Loans To Non Depository Institutions [Member]
Loans held in portfolio, net of unearned discounts	379,938	348,843
Loans held in portfolio, net of unearned discounts	379,788	348,809
Factored Receivables [Member]
Loans held in portfolio, net of unearned discounts	148,726	151,830
Loans held in portfolio, net of unearned discounts	148,600	151,593
Equipment Financing Receivables [Member]
Loans held in portfolio, net of unearned discounts	183,990	177,084
Loans held in portfolio, net of unearned discounts	169,310	162,094
Real Estate Residential Mortgage [Member]
Loans held in portfolio, net of unearned discounts	156,243	151,609
Loans held in portfolio, net of unearned discounts	156,243	151,609
Commercial Mortgage [Member]
Loans held in portfolio, net of unearned discounts	154,336	182,735
Loans held in portfolio, net of unearned discounts	154,336	182,735
Commercial Real Estate Construction and Land Development [Member]
Loans held in portfolio, net of unearned discounts	13,345	13,277
Loans held in portfolio, net of unearned discounts	13,345	13,277
Loans To Individual [Member]
Loans held in portfolio, net of unearned discounts	22,950	11,851
Loans held in portfolio, net of unearned discounts	22,950	11,851
Loans To Depository Institutions [Member]
Loans held in portfolio, net of unearned discounts	$ 0	$ 0

Amount of deferred interest and fee income, unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of acquired loans. Excludes amounts for loans and leases covered under loss sharing agreements.

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

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-Name Federal Regulation (FR)

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

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Statement of Position (SOP)

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-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.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

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

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Reference 5: http://www.xbrl.org/2003/role/presentationRef

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

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 13

-Paragraph 23

-Subparagraph a(i)(d)

-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.

Reference 9: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

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Reference 10: http://www.xbrl.org/2003/role/presentationRef

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-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

- 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+ Details

- Definition

The aggregate carrying amount of loans receivable that will be sold to other entities. Includes mortgage and all other loans (collectively, loans) not classified as held for investment. Such loans are stated at the lower of cost or market, or elected fair value. Mortgage loans exclude mortgage-backed securities which are considered a debt security (other loan).

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-Paragraph 4, 5, 6, 7, 9, 12, 28, 29

-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.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Statement of Position (SOP)

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-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.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

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

Reference 7: http://www.xbrl.org/2003/role/presentationRef

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+ Details