Note 3 - Loans and Allowance for Credit Losses (Details) - Troubled Debt Restructurings (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Financing Receivable, Modifications [Line Items]
Number of Contracts	6	5	3
Pre-Modification Carrying Value	$ 5,718	$ 6,709	$ 3,509
Period-End Carrying Value	5,453	6,678	3,447
Period-End Individual Impairment Allowance		797	1,794
Commercial [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	4	3	2
Pre-Modification Carrying Value	3,427	1,318	326
Period-End Carrying Value	3,164	1,196	321
Period-End Individual Impairment Allowance		797
Commercial Real Estate Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	2	2
Pre-Modification Carrying Value	2,291	5,391
Period-End Carrying Value	2,289	5,482
Construction [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts			1
Pre-Modification Carrying Value			3,183
Period-End Carrying Value			3,126
Period-End Individual Impairment Allowance			$ 1,794