Note 4 - Loans and Allowance for Credit Losses (Details) - The Company’s Recorded Investment In Loans (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Recorded investment in loans:
Individually evaluated for impairment	$ 34,597	$ 72,356
Collectively evaluated for impairment	2,910,561	2,420,739
Ending balance	2,945,158	2,493,095
Commercial Loan [Member]
Recorded investment in loans:
Individually evaluated for impairment	9,614	15,177
Collectively evaluated for impairment	684,736	529,893
Ending balance	694,350	545,070
Commercial Real Estate Investment [Member]
Recorded investment in loans:
Individually evaluated for impairment	2,682	11,401
Collectively evaluated for impairment	1,117,118	903,237
Ending balance	1,119,800	914,638
Commercial Real Estate Owner Occupied [Member]
Recorded investment in loans:
Individually evaluated for impairment	7,574	8,723
Collectively evaluated for impairment	309,917	289,134
Ending balance	317,491	297,857
Residential Mortgage [Member]
Recorded investment in loans:
Individually evaluated for impairment	113
Collectively evaluated for impairment	90,305	61,871
Ending balance	90,418	61,871
Home Equity Line of Credit [Member]
Recorded investment in loans:
Individually evaluated for impairment	682	510
Collectively evaluated for impairment	109,560	106,334
Ending balance	110,242	106,844
Consumer, Other [Member]
Recorded investment in loans:
Individually evaluated for impairment	70	43
Collectively evaluated for impairment	3,961	4,242
Ending balance	4,031	4,285
Construction Loans [Member]
Recorded investment in loans:
Individually evaluated for impairment	13,862	36,502
Collectively evaluated for impairment	594,964	526,028
Ending balance	$ 608,826	$ 562,530

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

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (h)

-URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953423-111524

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- Definition

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

+ References

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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 FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5074-111524

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522

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