Note 4 - Loans and Allowance for Credit Losses (Details) - Impaired Loans, Supplemental Schedule (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Note 4 - Loans and Allowance for Credit Losses (Details) - Impaired Loans, Supplemental Schedule [Line Items]
Average Recored Investment	$ 28,277	$ 46,995
Recognized Interest Income	192	387
Commercial [Member]
Note 4 - Loans and Allowance for Credit Losses (Details) - Impaired Loans, Supplemental Schedule [Line Items]
Average Recored Investment	4,842	13,729
Recognized Interest Income	67	54
Commercial Real Estate Loans [Member]
Note 4 - Loans and Allowance for Credit Losses (Details) - Impaired Loans, Supplemental Schedule [Line Items]
Average Recored Investment	19,298	28,507
Recognized Interest Income	117	300
Construction [Member]
Note 4 - Loans and Allowance for Credit Losses (Details) - Impaired Loans, Supplemental Schedule [Line Items]
Average Recored Investment	2,259	2,111
Recognized Interest Income		26
Residential Real Estate Loans [Member]
Note 4 - Loans and Allowance for Credit Losses (Details) - Impaired Loans, Supplemental Schedule [Line Items]
Average Recored Investment	162	685
Consumer Installment And Other [Member]
Note 4 - Loans and Allowance for Credit Losses (Details) - Impaired Loans, Supplemental Schedule [Line Items]
Average Recored Investment	1,716	1,963
Recognized Interest Income	$ 8	$ 7