Note 16 - Stockholders' Equity (Details) - Accumulated Other Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Beginning balance, loss, net of tax
Securities available-for sale	$ 3,339	$ (22,090)	$ (3,172)	$ (29,729)
Cash flow hedge derivatives	(3,985)		(2,397)
Total	(646)	(22,090)	(5,569)	(29,729)
Net unrealized gains/(losses) arising during the period
Securities available-for sale	(6,395)	13,750	104	24,844
Cash flow hedge derivatives	2,328	(263)	740	(263)
Total	(7,017)	23,270	1,454	42,413
Total	(2,950)	9,783	610	17,832
Total	(4,067)	13,487	844	24,581
Reclassification adjustment for net losses/(gains) in net income
Securities available-for sale	(1,931)	293	(1,943)	3,748
Total	3,332	(506)	3,353	(6,466)
Total	1,401	(213)	1,410	(2,718)
Total	1,931	(293)	1,943	(3,748)
Total other comprehensive income/(loss)
Total	(3,685)	22,764	4,807	35,947
Total	(1,549)	9,570	2,020	15,114
Total	(2,136)	13,194	2,787	20,833
Ending balance, loss, net of tax
Securities available-for sale	(1,125)	(8,633)	(1,125)	(8,633)
Cash flow hedge derivatives	(1,657)	(263)	(1,657)	(263)
Total	(2,782)	(8,896)	(2,782)	(8,896)
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Net unrealized gains/(losses) arising during the period
Securities available-for sale	(11,034)	23,724	177	42,867
Securities available-for sale	(4,639)	9,974	73	18,023
Securities available-for sale	(6,395)	13,750	104	24,844
Reclassification adjustment for net losses/(gains) in net income
Securities available-for sale	3,332	(506)	3,353	(6,466)
Securities available-for sale	1,401	(213)	1,410	(2,718)
Securities available-for sale	1,931	(293)	1,943	(3,748)
Total other comprehensive income/(loss)
Securities available-for sale	(7,702)	23,218	3,530	36,401
Securities available-for sale	(3,238)	9,761	1,483	15,305
Securities available-for sale	(4,464)	13,457	2,047	21,096
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Net unrealized gains/(losses) arising during the period
Cash flow hedge derivatives	4,017	(454)	1,277	(454)
Cash flow hedge derivatives	1,689	(191)	537	(191)
Cash flow hedge derivatives	2,328	(263)	740	(263)
Total other comprehensive income/(loss)
Cash flow hedge derivatives	4,017	(454)	1,277	(454)
Cash flow hedge derivatives	1,689	(191)	537	(191)
Cash flow hedge derivatives	$ 2,328	$ (263)	$ 740	$ (263)