Note 6 - Loans and Allowance for Credit Losses (Details) - Troubled Debt Restructurings (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended			12 Months Ended		6 Months Ended	12 Months Ended	6 Months Ended	12 Months Ended	6 Months Ended	12 Months Ended	6 Months Ended	12 Months Ended					6 Months Ended	12 Months Ended	6 Months Ended	12 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 Troubled Debt Restructuring [Member] Commercial Real Estate Investment [Member] Performing Financing Receivable [Member]	Dec. 31, 2013 Troubled Debt Restructuring [Member] Commercial Real Estate Investment [Member] Performing Financing Receivable [Member]	Dec. 31, 2013 Troubled Debt Restructuring [Member] Commercial Real Estate Investment [Member] Nonperforming Financing Receivable [Member]	Jun. 30, 2014 Troubled Debt Restructuring [Member] Commercial Real Estate Investment [Member]	Dec. 31, 2013 Troubled Debt Restructuring [Member] Commercial Real Estate Investment [Member]	Jun. 30, 2014 Troubled Debt Restructuring [Member] Construction, Commercial And Residential [Member] Performing Financing Receivable [Member]	Dec. 31, 2013 Troubled Debt Restructuring [Member] Construction, Commercial And Residential [Member] Performing Financing Receivable [Member]	Jun. 30, 2014 Troubled Debt Restructuring [Member] Construction, Commercial And Residential [Member] Nonperforming Financing Receivable [Member]	Dec. 31, 2013 Troubled Debt Restructuring [Member] Construction, Commercial And Residential [Member] Nonperforming Financing Receivable [Member]	Jun. 30, 2014 Troubled Debt Restructuring [Member] Construction, Commercial And Residential [Member]	Dec. 31, 2013 Troubled Debt Restructuring [Member] Construction, Commercial And Residential [Member]	Dec. 31, 2013 Troubled Debt Restructuring [Member] Commercial Loan [Member] Nonperforming Financing Receivable [Member]	Dec. 31, 2013 Troubled Debt Restructuring [Member] Commercial Loan [Member]	Dec. 31, 2013 Troubled Debt Restructuring [Member] Commercial Real Estate Owner Occupied [Member] Nonperforming Financing Receivable [Member]	Dec. 31, 2013 Troubled Debt Restructuring [Member] Commercial Real Estate Owner Occupied [Member]	Jun. 30, 2014 Troubled Debt Restructuring [Member] Performing Financing Receivable [Member]	Dec. 31, 2013 Troubled Debt Restructuring [Member] Performing Financing Receivable [Member]	Jun. 30, 2014 Troubled Debt Restructuring [Member] Nonperforming Financing Receivable [Member]	Dec. 31, 2013 Troubled Debt Restructuring [Member] Nonperforming Financing Receivable [Member]	Jun. 30, 2014 Troubled Debt Restructuring [Member]	Dec. 31, 2013 Troubled Debt Restructuring [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	0	0	0	0				2	3					2	2		3		1					4	9
TDRs					$ 3,365	$ 3,377	$ 217	$ 3,365	$ 3,594	$ 4,541	$ 4,567	$ 912	$ 912	$ 5,453	$ 5,479	$ 4,042	$ 4,042	$ 4,081	$ 4,081	$ 7,906	$ 7,944	$ 912	$ 9,252	$ 8,818	$ 17,196