Note 5 - Loans (Details) - Composition of Impaired Loans by Class (Loans, Gross [Member], USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Note 5 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment	$ 24,758	$ 22,968
Impaired loans with no related allowance, unpaid principal balance	37,577
Impaired loans with related allowance, recorded investment	18,624	21,727
Impaired loans with related allowance, unpaid principal balance	21,379
Impaired loans with related allowance, related allowance	2,470	2,555
Total Impaired Loans, recorded investment	43,382	44,695
Total Impaired Loans, unpaid principal balance	58,956
Total Impaired Loans, related allowance	2,470	2,555
Construction, Land Development and Other Land Loan [Member]
Note 5 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment	2,757	3,244
Impaired loans with no related allowance, unpaid principal balance	6,016
Impaired loans with related allowance, recorded investment	259	260
Impaired loans with related allowance, unpaid principal balance	259
Impaired loans with related allowance, related allowance	68	68
Total Impaired Loans, recorded investment	3,016	3,504
Total Impaired Loans, unpaid principal balance	6,275
Total Impaired Loans, related allowance	68	68
Multi Family Residential [Member]
Note 5 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment	180	181
Impaired loans with no related allowance, unpaid principal balance	239
Total Impaired Loans, recorded investment	180	181
Total Impaired Loans, unpaid principal balance	239
Non Farm Nonresidential [Member]
Note 5 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment	20,132	17,414
Impaired loans with no related allowance, unpaid principal balance	24,940
Impaired loans with related allowance, recorded investment	15,883	18,839
Impaired loans with related allowance, unpaid principal balance	17,338
Impaired loans with related allowance, related allowance	1,770	1,668
Total Impaired Loans, recorded investment	36,015	36,253
Total Impaired Loans, unpaid principal balance	42,278
Total Impaired Loans, related allowance	1,770	1,668
Commercial Real Estate Loans [Member]
Note 5 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment	23,069	20,839
Impaired loans with no related allowance, unpaid principal balance	31,195
Impaired loans with related allowance, recorded investment	16,142	19,099
Impaired loans with related allowance, unpaid principal balance	17,597
Impaired loans with related allowance, related allowance	1,838	1,736
Total Impaired Loans, recorded investment	39,211	39,938
Total Impaired Loans, unpaid principal balance	48,792
Total Impaired Loans, related allowance	1,838	1,736
Revolving Lines Secured By Single Family Residential Properties [Member]
Note 5 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with related allowance, recorded investment	404	404
Impaired loans with related allowance, unpaid principal balance	404
Impaired loans with related allowance, related allowance		83
Total Impaired Loans, recorded investment	404	404
Total Impaired Loans, unpaid principal balance	404
Total Impaired Loans, related allowance		83
Single Family Residential Closed End First Lien [Member]
Note 5 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment	921	1,369
Impaired loans with no related allowance, unpaid principal balance	5,208
Impaired loans with related allowance, recorded investment	253	323
Impaired loans with related allowance, unpaid principal balance	253
Impaired loans with related allowance, related allowance	13	18
Total Impaired Loans, recorded investment	1,174	1,692
Total Impaired Loans, unpaid principal balance	5,461
Total Impaired Loans, related allowance	13	18
Single Family Residential Closed End Junior Lien [Member]
Note 5 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment	27
Impaired loans with no related allowance, unpaid principal balance	27
Impaired loans with related allowance, recorded investment	167	195
Impaired loans with related allowance, unpaid principal balance	167
Impaired loans with related allowance, related allowance	138	62
Total Impaired Loans, recorded investment	194	195
Total Impaired Loans, unpaid principal balance	194
Total Impaired Loans, related allowance	138	62
Single Family Residential [Member]
Note 5 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment	948	1,369
Impaired loans with no related allowance, unpaid principal balance	5,235
Impaired loans with related allowance, recorded investment	824	922
Impaired loans with related allowance, unpaid principal balance	824
Impaired loans with related allowance, related allowance	151	163
Total Impaired Loans, recorded investment	1,772	2,291
Total Impaired Loans, unpaid principal balance	6,059
Total Impaired Loans, related allowance	151	163
Commercial And Industrial [Member]
Note 5 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment	735	753
Impaired loans with no related allowance, unpaid principal balance	1,132
Impaired loans with related allowance, recorded investment	1,641	1,680
Impaired loans with related allowance, unpaid principal balance	2,941
Impaired loans with related allowance, related allowance	478	644
Total Impaired Loans, recorded investment	2,376	2,433
Total Impaired Loans, unpaid principal balance	4,073
Total Impaired Loans, related allowance	478	644
Consumer [Member]
Note 5 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment	6	7
Impaired loans with no related allowance, unpaid principal balance	15
Impaired loans with related allowance, recorded investment	17	26
Impaired loans with related allowance, unpaid principal balance	17
Impaired loans with related allowance, related allowance	3	12
Total Impaired Loans, recorded investment	23	33
Total Impaired Loans, unpaid principal balance	32
Total Impaired Loans, related allowance	$ 3	$ 12