Note 5 - Loans (Details) - Composition of Impaired Loans by Class (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Note 5 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment	$ 21,579	$ 22,968
Impaired loans with no related allowance, unpaid principal balance	23,629	38,132
Impaired loans with related allowance, recorded investment	18,901	21,727
Impaired loans with related allowance, unpaid principal balance	26,222	23,027
Impaired loans, related allowance	2,476	2,555
Impaired loans, recorded investment	40,480	44,695
Impaired loans, unpaid principal balance	49,851	61,159
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	707	3,244
Impaired loans with no related allowance, unpaid principal balance	1,236	6,503
Impaired loans with related allowance, recorded investment	172	260
Impaired loans with related allowance, unpaid principal balance	172	260
Impaired loans, related allowance	30	68
Impaired loans, recorded investment	879	3,504
Impaired loans, unpaid principal balance	1,408	6,763
Multi Family Residential [Member]
Note 5 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment		181
Impaired loans with no related allowance, unpaid principal balance		239
Impaired loans, recorded investment		181
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	19,535	17,414
Impaired loans with no related allowance, unpaid principal balance	19,775	24,422
Impaired loans with related allowance, recorded investment	17,155	18,839
Impaired loans with related allowance, unpaid principal balance	23,177	18,839
Impaired loans, related allowance	2,085	1,668
Impaired loans, recorded investment	36,690	36,253
Impaired loans, unpaid principal balance	42,952	43,261
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	20,242	20,839
Impaired loans with no related allowance, unpaid principal balance	21,011	31,164
Impaired loans with related allowance, recorded investment	17,327	19,099
Impaired loans with related allowance, unpaid principal balance	23,349	19,099
Impaired loans, related allowance	2,115	1,736
Impaired loans, recorded investment	37,569	39,938
Impaired loans, unpaid principal balance	44,360	50,263
Single-family Real Estate, Revolving, Open-end Loans [Member]
Note 5 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment	333
Impaired loans with no related allowance, unpaid principal balance	333
Impaired loans with related allowance, recorded investment		404
Impaired loans with related allowance, unpaid principal balance		404
Impaired loans, related allowance		83
Impaired loans, recorded investment	333	404
Impaired loans, unpaid principal balance	333	404
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	620	1,369
Impaired loans with no related allowance, unpaid principal balance	1,901	5,811
Impaired loans with related allowance, recorded investment	247	323
Impaired loans with related allowance, unpaid principal balance	247	323
Impaired loans, related allowance	28	18
Impaired loans, recorded investment	867	1,692
Impaired loans, unpaid principal balance	2,148	6,134
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	25
Impaired loans with no related allowance, unpaid principal balance	25
Impaired loans with related allowance, recorded investment	107	195
Impaired loans with related allowance, unpaid principal balance	107	195
Impaired loans, related allowance	42	62
Impaired loans, recorded investment	132	195
Impaired loans, unpaid principal balance	132	195
Single Family Residential [Member]
Note 5 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment	978	1,369
Impaired loans with no related allowance, unpaid principal balance	2,259	5,811
Impaired loans with related allowance, recorded investment	354	922
Impaired loans with related allowance, unpaid principal balance	354	922
Impaired loans, related allowance	70	163
Impaired loans, recorded investment	1,332	2,291
Impaired loans, unpaid principal balance	2,613	6,733
Commercial and Industrial [Member]
Note 5 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment	359	753
Impaired loans with no related allowance, unpaid principal balance	359	1,150
Impaired loans with related allowance, recorded investment	1,205	1,680
Impaired loans with related allowance, unpaid principal balance	2,504	2,980
Impaired loans, related allowance	288	644
Impaired loans, recorded investment	1,564	2,433
Impaired loans, unpaid principal balance	2,863	4,130
Consumer [Member]
Note 5 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment		7
Impaired loans with no related allowance, unpaid principal balance		7
Impaired loans with related allowance, recorded investment	15	26
Impaired loans with related allowance, unpaid principal balance	15	26
Impaired loans, related allowance	3	12
Impaired loans, recorded investment	15	33
Impaired loans, unpaid principal balance	$ 15	$ 33