Note 4 - Loans and Allowance for Credit Losses (Details) - Impaired Loans, Supplemental Schedule (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Note 4 - Loans and Allowance for Credit Losses (Details) - Impaired Loans, Supplemental Schedule [Line Items]
Average Recored Investment	$ 27,813	$ 41,612	$ 27,949	$ 43,752
Recognized Interest Income	169	201	581	878
Commercial [Member]
Note 4 - Loans and Allowance for Credit Losses (Details) - Impaired Loans, Supplemental Schedule [Line Items]
Average Recored Investment	3,885	9,977	4,388	11,726
Recognized Interest Income	59	35	186	141
Commercial Real Estate Loans [Member]
Note 4 - Loans and Allowance for Credit Losses (Details) - Impaired Loans, Supplemental Schedule [Line Items]
Average Recored Investment	20,787	27,714	19,961	27,795
Recognized Interest Income	103	129	373	634
Construction [Member]
Note 4 - Loans and Allowance for Credit Losses (Details) - Impaired Loans, Supplemental Schedule [Line Items]
Average Recored Investment	1,934	2,660	2,076	2,389
Recognized Interest Income		29		80
Residential Real Estate Loans [Member]
Note 4 - Loans and Allowance for Credit Losses (Details) - Impaired Loans, Supplemental Schedule [Line Items]
Average Recored Investment		207	108	483
Consumer Installment And Other [Member]
Note 4 - Loans and Allowance for Credit Losses (Details) - Impaired Loans, Supplemental Schedule [Line Items]
Average Recored Investment	1,207	1,054	1,416	1,359
Recognized Interest Income	$ 7	$ 8	$ 22	$ 23