Note 7 - Loans and Allowance for Loan Losses (Details) - Individually Impaired Loans By Class Of Loans (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	$ 52,822	$ 61,331
Recorded Investment With No Allowance	19,695	24,899
Recorded Investment With Allowance	29,928	33,440
Total Recorded Investment	49,623	58,339
Allowance for Loan Losses Allocated	3,590	4,102
Real Estate Construction And Land Development [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	15,753	17,234
Recorded Investment With No Allowance	8,566	9,742
Recorded Investment With Allowance	4,400	4,699
Total Recorded Investment	12,966	14,441
Allowance for Loan Losses Allocated	856	930
Real Estate Mortgage Residential [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	10,930	11,595
Recorded Investment With No Allowance	3,980	2,871
Recorded Investment With Allowance	6,645	8,612
Total Recorded Investment	10,625	11,483
Allowance for Loan Losses Allocated	1,195	1,443
Real Estate Mortgage Farmland And Other Commercial Enterprises [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	25,833	32,102
Recorded Investment With No Allowance	7,126	12,262
Recorded Investment With Allowance	18,600	19,746
Total Recorded Investment	25,726	32,008
Allowance for Loan Losses Allocated	1,278	1,443
Commercial And Industrial [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	240	311
Recorded Investment With No Allowance	23	24
Recorded Investment With Allowance	217	293
Total Recorded Investment	240	317
Allowance for Loan Losses Allocated	195	200
Consumer Unsecured [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	66	71
Recorded Investment With No Allowance	0	0
Recorded Investment With Allowance	66	72
Total Recorded Investment	66	72
Allowance for Loan Losses Allocated	66	71
Consumer Secured [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance		18
Recorded Investment With No Allowance		0
Recorded Investment With Allowance		18
Total Recorded Investment		18
Allowance for Loan Losses Allocated		$ 15