Note 7 - Loans and Allowance for Loan Losses (Details) - Recorded Investment in Nonperforming Loans by Class of Loans - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Real Estate:
Nonaccrual	$ 8,201	$ 11,508
Restructured Loans	24,155	24,429
Loans Past Due 90 Days or More and Still Accruing	0	0
Real Estate Portfolio Segment [Member] \| Real Estate Construction and Land Development [Member]
Real Estate:
Nonaccrual	1,861	3,744
Restructured Loans	3,679	3,742
Loans Past Due 90 Days or More and Still Accruing	0	0
Real Estate Portfolio Segment [Member] \| Real Estate Mortgage Residential [Member]
Real Estate:
Nonaccrual	2,527	3,474
Restructured Loans	4,350	4,674
Loans Past Due 90 Days or More and Still Accruing	0	0
Real Estate Portfolio Segment [Member] \| Real Estate Mortgage Farmland and Other Commercial Enterprises [Member]
Real Estate:
Nonaccrual	3,739	4,202
Restructured Loans	15,594	16,004
Loans Past Due 90 Days or More and Still Accruing	0	0
Commercial Portfolio Segment [Member] \| Commercial and Industrial [Member]
Real Estate:
Nonaccrual	55	81
Restructured Loans	385	0
Loans Past Due 90 Days or More and Still Accruing	0	0
Commercial Portfolio Segment [Member] \| Commercial Other [Member]
Real Estate:
Nonaccrual	9
Restructured Loans	0
Loans Past Due 90 Days or More and Still Accruing	0
Commercial Portfolio Segment [Member] \| Lease Financing [Member]
Real Estate:
Nonaccrual		7
Restructured Loans		0
Loans Past Due 90 Days or More and Still Accruing		0
Consumer Portfolio Segment [Member] \| Consumer Secured [Member]
Real Estate:
Nonaccrual	10
Restructured Loans	0
Loans Past Due 90 Days or More and Still Accruing	0
Consumer Portfolio Segment [Member] \| Consumer Unsecured [Member]
Real Estate:
Nonaccrual	0	0
Restructured Loans	147	9
Loans Past Due 90 Days or More and Still Accruing	$ 0	$ 0

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- Definition

The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 40

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18845-111554

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- Definition

Recorded investment in financing receivables that are 90 days or more past due and still accruing.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 7

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5111-111524

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- Definition

Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date.

+ References

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