Note 5 - Fair Value Measurements (Detail) - Carrying Amount of Assets Measured at Fair Value on a Nonrecurring Basis (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Real Estate Construction And Land Development [Member] \| Fair Value, Inputs, Level 3 [Member]
OREO	$ 9,418	$ 8,826
Real Estate Construction And Land Development [Member]
OREO	9,418	8,826
Real Estate Mortgage Residential [Member] \| Fair Value, Inputs, Level 3 [Member]
OREO	1,454	1,217
Real Estate Mortgage Residential [Member]
OREO	1,454	1,217
Real Estate Mortgage Farmland And Other Commercial Enterprises [Member] \| Fair Value, Inputs, Level 3 [Member]
OREO	2,841	4,785
Real Estate Mortgage Farmland And Other Commercial Enterprises [Member]
OREO	2,841	4,785
Total [Member] \| Fair Value, Inputs, Level 3 [Member]
OREO	13,713	14,828
Total [Member]
OREO	13,713	14,828
Fair Value, Inputs, Level 3 [Member] \| Real Estate Construction And Land Development [Member]
Impaired Loans	14,601	18,636
Fair Value, Inputs, Level 3 [Member] \| Real Estate Mortgage Residential [Member]
Impaired Loans	2,515	8,160
Fair Value, Inputs, Level 3 [Member] \| Real Estate Mortgage Farmland And Other Commercial Enterprises [Member]
Impaired Loans	2,588	12,928
Fair Value, Inputs, Level 3 [Member] \| Commercial And Industrial [Member]
Impaired Loans	6	293
Fair Value, Inputs, Level 3 [Member] \| Consumer Secured [Member]
Impaired Loans	4
Fair Value, Inputs, Level 3 [Member] \| Consumer Unsecured [Member]
Impaired Loans	115
Fair Value, Inputs, Level 3 [Member] \| Total [Member]
Impaired Loans	19,829	40,064
Fair Value, Inputs, Level 3 [Member] \| Consumer [Member]
Impaired Loans		47
Fair Value, Inputs, Level 3 [Member]
Impaired Loans	990,603	1,043,824
Real Estate Construction And Land Development [Member]
Impaired Loans	14,601	18,636
Real Estate Mortgage Residential [Member]
Impaired Loans	2,515	8,160
Real Estate Mortgage Farmland And Other Commercial Enterprises [Member]
Impaired Loans	2,588	12,928
Commercial And Industrial [Member]
Impaired Loans	6	293
Consumer Secured [Member]
Impaired Loans	4
Consumer Unsecured [Member]
Impaired Loans	115
Total [Member]
Impaired Loans	19,829	40,064
Consumer [Member]
Impaired Loans		$ 47

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents loan receivable as presented on the statement of financial position which may include mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts, or any other loans which are due the Company as of the balance sheet date.

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