Note 5 - Loans and Allowance for Loan Losses (Detail) - Loan Portfolio (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Consumer:
Total loans	$ 1,237,813	$ 1,254,954
Commercial Real Estate Owner Occupied [Member] \| Purchased Credit Impaired Loans [Member]
Commercial:
Commercial real estate loans	42,068	44,925
Commercial Real Estate Owner Occupied [Member] \| All Other Loans [Member]
Commercial:
Commercial real estate loans	243,285	254,491
Commercial Real Estate Owner Occupied [Member] \| Total [Member]
Commercial:
Commercial real estate loans	285,353	299,416
Commercial Real Estate Investor Income Producing [Member] \| Purchased Credit Impaired Loans [Member]
Commercial:
Commercial real estate loans	77,744	85,959
Commercial Real Estate Investor Income Producing [Member] \| All Other Loans [Member]
Commercial:
Commercial real estate loans	289,690	285,998
Commercial Real Estate Investor Income Producing [Member] \| Total [Member]
Commercial:
Commercial real estate loans	367,434	371,957
Other Commercial [Member] \| Purchased Credit Impaired Loans [Member]
Commercial:
Commercial real estate loans	9	742
Other Commercial [Member] \| All Other Loans [Member]
Commercial:
Commercial real estate loans	4,885	4,886
Other Commercial [Member] \| Total [Member]
Commercial:
Commercial real estate loans	4,894	5,628
Purchased Credit Impaired Loans [Member]
Commercial:
Commercial and industrial	6,543	7,323
Total commercial loans	162,672	178,490
Acquisition, construction and development (AC&D)	36,308	39,541
Consumer:
Residential mortgage	39,100	40,483
Home equity lines of credit (HELOC)	1,955	1,949
Residential construction	10,596	11,265
Other loans to individuals	1,640	2,095
Total consumer loans	53,291	55,792
Total loans	215,963	234,282
Total loans, net of deferred fees	215,963	234,282
All Other Loans [Member]
Commercial:
Commercial and industrial	112,253	111,809
Total commercial loans	754,674	758,304
Acquisition, construction and development (AC&D)	104,561	101,120
Consumer:
Residential mortgage	141,268	148,049
Home equity lines of credit (HELOC)	154,847	161,676
Residential construction	44,609	41,547
Other loans to individuals	18,597	13,458
Total consumer loans	359,321	364,730
Total loans	1,113,995	1,123,034
Deferred fees	(209)	(609)
Total loans, net of deferred fees	1,113,786	1,122,425
Total [Member]
Commercial:
Commercial and industrial	118,796	119,132
Total commercial loans	917,346	936,794
Acquisition, construction and development (AC&D)	140,869	140,661
Consumer:
Residential mortgage	180,368	188,532
Home equity lines of credit (HELOC)	156,802	163,625
Residential construction	55,205	52,812
Other loans to individuals	20,237	15,553
Total consumer loans	412,612	420,522
Total loans	1,329,958	1,357,316
Deferred fees	(209)	(609)
Total loans, net of deferred fees	$ 1,329,749	$ 1,356,707

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Amount before allowance of commercial loans and leases receivable includes, but not limited to, commercial and industrial loans, agricultural loans, mortgage loans, promissory notes, interbank and other loans to financial institutions, draws against credit facilities, trade financing, lease financings. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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Amount before allowance of loans issued to build, improve or remodel a residential home. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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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.

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