Note 4 - Loans (Details) - Composition of Impaired Loans by Class (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Note 4 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment		$ 25,206
Impaired loans with no related allowance, unpaid principal balance		56,494
Impaired loans with related allowance, recorded investment		16,889
Impaired loans with related allowance, unpaid principal balance		16,889
Impaired loans with related allowance, related allowance		2,477
	46,574	42,095
		73,383
		2,477
Construction Land Development And Other Land Loans [Member] | Loans, Gross [Member]
Note 4 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment	3,400	3,732
Impaired loans with no related allowance, unpaid principal balance	6,660	16,005
Impaired loans with related allowance, recorded investment	253	254
Impaired loans with related allowance, unpaid principal balance	253	254
Impaired loans with related allowance, related allowance	67	68
	3,653	3,986
	6,913	16,259
	67	68
Construction Land Development And Other Land Loans [Member] | Other Loans Held For Sale [Member]
Note 4 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment		776
Impaired loans with no related allowance, unpaid principal balance		8,656
		776
		8,656
Construction Land Development And Other Land Loans [Member]
Note 4 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment		4,508
Impaired loans with no related allowance, unpaid principal balance		24,661
Impaired loans with related allowance, recorded investment		254
Impaired loans with related allowance, unpaid principal balance		254
Impaired loans with related allowance, related allowance		68
		4,762
		24,915
		68
Multi Family Residential [Member] | Loans, Gross [Member]
Note 4 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment	181	0
Impaired loans with no related allowance, unpaid principal balance	239	0
Impaired loans with related allowance, recorded investment	0	246
Impaired loans with related allowance, unpaid principal balance	0	246
Impaired loans with related allowance, related allowance	0	76
	181	246
	239	246
	0	76
Multi Family Residential [Member] | Other Loans Held For Sale [Member]
Note 4 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment		0
Impaired loans with no related allowance, unpaid principal balance		0
		0
		0
Multi Family Residential [Member]
Note 4 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment		0
Impaired loans with no related allowance, unpaid principal balance		0
Impaired loans with related allowance, recorded investment		246
Impaired loans with related allowance, unpaid principal balance		246
Impaired loans with related allowance, related allowance		76
		246
		246
		76
Non Farm Nonresidential [Member] | Loans, Gross [Member]
Note 4 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment	22,703	18,012
Impaired loans with no related allowance, unpaid principal balance	28,967	24,275
Impaired loans with related allowance, recorded investment	14,416	14,309
Impaired loans with related allowance, unpaid principal balance	14,416	14,309
Impaired loans with related allowance, related allowance	1,934	2,055
	37,119	32,321
	43,383	38,584
	1,934	2,055
Non Farm Nonresidential [Member] | Other Loans Held For Sale [Member]
Note 4 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment		0
Impaired loans with no related allowance, unpaid principal balance		0
		0
		0
Non Farm Nonresidential [Member]
Note 4 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment		18,012
Impaired loans with no related allowance, unpaid principal balance		24,275
Impaired loans with related allowance, recorded investment		14,309
Impaired loans with related allowance, unpaid principal balance		14,309
Impaired loans with related allowance, related allowance		2,055
		32,321
		38,584
		2,055
Commercial Real Estate Loans [Member] | Loans, Gross [Member]
Note 4 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment	26,284	21,744
Impaired loans with no related allowance, unpaid principal balance	35,866	40,280
Impaired loans with related allowance, recorded investment	14,669	14,809
Impaired loans with related allowance, unpaid principal balance	14,669	14,809
Impaired loans with related allowance, related allowance	2,001	2,199
	40,953	36,553
	50,535	55,089
	2,001	2,199
Commercial Real Estate Loans [Member] | Other Loans Held For Sale [Member]
Note 4 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment		776
Impaired loans with no related allowance, unpaid principal balance		8,656
		776
		8,656
Commercial Real Estate Loans [Member]
Note 4 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment		22,520
Impaired loans with no related allowance, unpaid principal balance		48,936
Impaired loans with related allowance, recorded investment		14,809
Impaired loans with related allowance, unpaid principal balance		14,809
Impaired loans with related allowance, related allowance		2,199
		37,329
		63,745
		2,199
Revolving Lines Secured By Single Family Residential Properties [Member] | Loans, Gross [Member]
Note 4 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment	0	0
Impaired loans with no related allowance, unpaid principal balance	0	0
Impaired loans with related allowance, recorded investment	404	404
Impaired loans with related allowance, unpaid principal balance	404	404
Impaired loans with related allowance, related allowance	100	0
	404	404
	404	404
	100	0
Revolving Lines Secured By Single Family Residential Properties [Member] | Other Loans Held For Sale [Member]
Note 4 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment		0
Impaired loans with no related allowance, unpaid principal balance		0
		0
		0
Revolving Lines Secured By Single Family Residential Properties [Member]
Note 4 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment		0
Impaired loans with no related allowance, unpaid principal balance		0
Impaired loans with related allowance, recorded investment		404
Impaired loans with related allowance, unpaid principal balance		404
Impaired loans with related allowance, related allowance		0
		404
		404
		0
Single Family Residential Closed End First Lien [Member] | Loans, Gross [Member]
Note 4 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment	1,780	1,963
Impaired loans with no related allowance, unpaid principal balance	6,224	6,408
Impaired loans with related allowance, recorded investment	414	707
Impaired loans with related allowance, unpaid principal balance	414	707
Impaired loans with related allowance, related allowance	49	54
	2,194	2,670
	6,638	7,115
	49	54
Single Family Residential Closed End First Lien [Member] | Other Loans Held For Sale [Member]
Note 4 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment		0
Impaired loans with no related allowance, unpaid principal balance		0
		0
		0
Single Family Residential Closed End First Lien [Member]
Note 4 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment		1,963
Impaired loans with no related allowance, unpaid principal balance		6,408
Impaired loans with related allowance, recorded investment		707
Impaired loans with related allowance, unpaid principal balance		707
Impaired loans with related allowance, related allowance		54
		2,670
		7,115
		54
Single Family Residential Closed End Junior Lien [Member] | Loans, Gross [Member]
Note 4 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment	29	31
Impaired loans with no related allowance, unpaid principal balance	29	31
Impaired loans with related allowance, recorded investment	170	173
Impaired loans with related allowance, unpaid principal balance	170	173
Impaired loans with related allowance, related allowance	60	162
	199	204
	199	204
	60	162
Single Family Residential Closed End Junior Lien [Member] | Other Loans Held For Sale [Member]
Note 4 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment		0
Impaired loans with no related allowance, unpaid principal balance		0
		0
		0
Single Family Residential Closed End Junior Lien [Member]
Note 4 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment		31
Impaired loans with no related allowance, unpaid principal balance		31
Impaired loans with related allowance, recorded investment		173
Impaired loans with related allowance, unpaid principal balance		173
Impaired loans with related allowance, related allowance		162
		204
		204
		162
Single Family Residential [Member] | Loans, Gross [Member]
Note 4 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment	1,809	1,994
Impaired loans with no related allowance, unpaid principal balance	6,253	6,439
Impaired loans with related allowance, recorded investment	988	1,284
Impaired loans with related allowance, unpaid principal balance	988	1,284
Impaired loans with related allowance, related allowance	209	216
	2,797	3,278
	7,241	7,723
	209	216
Single Family Residential [Member] | Other Loans Held For Sale [Member]
Note 4 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment		0
Impaired loans with no related allowance, unpaid principal balance		0
		0
		0
Single Family Residential [Member]
Note 4 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment		1,994
Impaired loans with no related allowance, unpaid principal balance		6,439
Impaired loans with related allowance, recorded investment		1,284
Impaired loans with related allowance, unpaid principal balance		1,284
Impaired loans with related allowance, related allowance		216
		3,278
		7,723
		216
Commercial And Industrial [Member] | Loans, Gross [Member]
Note 4 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment	745	674
Impaired loans with no related allowance, unpaid principal balance	1,406	1,101
Impaired loans with related allowance, recorded investment	2,043	776
Impaired loans with related allowance, unpaid principal balance	2,043	776
Impaired loans with related allowance, related allowance	836	58
	2,788	1,450
	3,449	1,877
	836	58
Commercial And Industrial [Member] | Other Loans Held For Sale [Member]
Note 4 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment		0
Impaired loans with no related allowance, unpaid principal balance		0
		0
		0
Commercial And Industrial [Member]
Note 4 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment		674
Impaired loans with no related allowance, unpaid principal balance		1,101
Impaired loans with related allowance, recorded investment		776
Impaired loans with related allowance, unpaid principal balance		776
Impaired loans with related allowance, related allowance		58
		1,450
		1,877
		58
Consumer [Member] | Loans, Gross [Member]
Note 4 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment	8	18
Impaired loans with no related allowance, unpaid principal balance	8	18
Impaired loans with related allowance, recorded investment	28	20
Impaired loans with related allowance, unpaid principal balance	28	20
Impaired loans with related allowance, related allowance	4	4
	36	38
	36	38
	4	4
Consumer [Member] | Other Loans Held For Sale [Member]
Note 4 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
		0
		0
Consumer [Member]
Note 4 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment		18
Impaired loans with no related allowance, unpaid principal balance		18
Impaired loans with related allowance, recorded investment		20
Impaired loans with related allowance, unpaid principal balance		20
Impaired loans with related allowance, related allowance		4
		38
		38
		4
Loans, Gross [Member]
Note 4 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment	28,846	24,430
Impaired loans with no related allowance, unpaid principal balance	43,533	47,838
Impaired loans with related allowance, recorded investment	17,728	16,889
Impaired loans with related allowance, unpaid principal balance	17,728	16,889
Impaired loans with related allowance, related allowance	3,050	2,477
	46,574	41,319
	61,261	64,727
	3,050	2,477
Other Loans Held For Sale [Member]
Note 4 - Loans (Details) - Composition of Impaired Loans by Class [Line Items]
Impaired loans with no related allowance, recorded investment		776
Impaired loans with no related allowance, unpaid principal balance		8,656
		776
		$ 8,656