Note 5 - Loans and Allowances for Credit Losses - Nonaccrual Loans (Details) - USD ($) $ in Thousands		Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Commercial Portfolio Segment [Member]
Nonaccrual loan, recorded investment		$ 4,234	$ 4,940	$ 11,257
Income Producing Portfolio Segment [Member]
Nonaccrual loan, recorded investment		10,305	5,961	2,152
Owner Occupied Portfolio Segment [Member]
Nonaccrual loan, recorded investment		1,263	1,268	1,314
Residential Portfolio Segment [Member]
Nonaccrual loan, recorded investment		582	329	342
Construction Portfolio Segment [Member]
Nonaccrual loan, recorded investment		5,422	557	3,608
Home Equity Portfolio Segment [Member]
Nonaccrual loan, recorded investment		$ 122	161	889
Other Consumer Portfolio Segment [Member]
Nonaccrual loan, recorded investment			23	10
Nonaccrual loan, recorded investment	[1],[2]	$ 21,928	$ 13,239	$ 19,572

[1] Excludes troubled debt restructurings (“TDRs”) that were performing under their restructured terms totaling $6.8 million at March 31, 2016, $11.8 million at December 31, 2015 and $13.4 million at March 31, 2015.

[2] Gross interest income of $335 thousand would have been recorded for the three months ended March 31, 2016 if nonaccrual loans shown above had been current and in accordance with their original terms, while interest actually recorded on such loans was $74 thousand. See Note 1 to the Consolidated Financial Statements for a description of the Company’s policy for placing loans on nonaccrual status.