Note 8 - Loans and Allowance for Loan Losses - Major Classifications of Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Loan receivable	$ 1,035,469	$ 1,035,263
Less unearned income	0	0
Loans, net of unearned income	1,035,469	1,035,263
Real Estate Portfolio Segment [Member]
Loans, net of unearned income	923,894	916,806
Real Estate Portfolio Segment [Member] \| Real Estate Construction and Land Development [Member]
Loan receivable	131,376	129,181
Loans, net of unearned income	131,376	129,181
Real Estate Portfolio Segment [Member] \| Real Estate Mortgage Residential [Member]
Loan receivable	351,838	355,304
Loans, net of unearned income	351,838	355,304
Real Estate Portfolio Segment [Member] \| Real Estate Mortgage Farmland and Other Commercial Enterprises [Member]
Loan receivable	440,680	432,321
Loans, net of unearned income	440,680	432,321
Commercial Portfolio Segment [Member]
Loans, net of unearned income	104,018	110,542
Commercial Portfolio Segment [Member] \| Commercial and Industrial [Member]
Loan receivable	68,472	63,417
Loans, net of unearned income	68,472	63,417
Commercial Portfolio Segment [Member] \| States and Political Subdivisions [Member]
Loan receivable	18,883	27,209
Loans, net of unearned income	18,883	27,209
Commercial Portfolio Segment [Member] \| Commercial Other [Member]
Loan receivable	16,663	19,916
Loans, net of unearned income	16,663	19,916
Consumer Portfolio Segment [Member]
Loans, net of unearned income	7,557	7,915
Consumer Portfolio Segment [Member] \| Consumer Secured [Member]
Loan receivable	3,980	4,853
Loans, net of unearned income	3,980	4,853
Consumer Portfolio Segment [Member] \| Consumer Unsecured [Member]
Loan receivable	3,577	3,062
Loans, net of unearned income	$ 3,577	$ 3,062

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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-SubTopic 210
-Section S99
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-Subparagraph (SX 210.9-03.7)
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