Note 16 - Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Securities available-for sale, Pre-tax	$ 7,688	$ (11,034)	$ 25,552	$ 177
Securities available-for sale, Tax expense	3,232	(4,639)	10,742	73
Unrealized holding gain/(loss) on securities available-for-sale	4,456	(6,395)	14,810	104
Securities available-for sale, Reclassification adjustment, Pre-tax	(1,655)	3,332	(1,449)	3,353
Securities available-for sale, Reclassification adjustment, Tax expense	(696)	1,401	(609)	1,410
Less: reclassification adjustments included in net income	(959)	1,931	(840)	1,943
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Cash flow hedge derivatives, Pre-tax	(2,212)	4,017	(7,595)	1,277
Cash flow hedge derivatives, Tax expense	(930)	1,689	(3,193)	537
Unrealized holding (loss)/gain on cash flow hedge derivatives	(1,282)	2,328	(4,402)	740
Securities available-for sale, Beginning balance, net of tax	5,042	3,339	(5,431)	(3,172)	$ (3,172)
Cash flow hedge derivatives, Beginning balance, net of tax	(6,115)	(3,985)	(2,995)	(2,397)	(2,397)
Total, Beginning balance, net of tax	(1,073)	(646)	(8,426)	(5,569)	(5,569)
Unrealized holding gain/(loss) on securities available-for-sale	4,456	(6,395)	14,810	104
Unrealized holding (loss)/gain on cash flow hedge derivatives	(1,282)	2,328	(4,402)	740
Total, Pre-tax	5,476	(7,017)	17,957	1,454
Total, Tax expense	2,302	(2,950)	7,549	610
Total, Net-of-tax	3,174	(4,067)	10,408	844
Less: reclassification adjustments included in net income	959	(1,931)	840	(1,943)
Total, Reclassification adjustment, Pre-tax	(1,655)	3,332	(1,449)	3,353
Total, Reclassification adjustment, Tax expense	(696)	1,401	(609)	1,410
Total, Reclassification adjustment, Net-of-tax	(959)	1,931	(840)	1,943
Securities available-for sale, Total other comprehensive income, Pre-tax	6,033	(7,702)	24,103	3,530
Securities available-for sale, Total other comprehensive income, Tax expense	2,536	(3,238)	10,133	1,483
Securities available-for sale, Total other comprehensive income, Net-of-tax	3,497	(4,464)	13,970	2,047
Cash flow hedge derivatives, Total other comprehensive income, Pre-tax	(2,212)	4,017	(7,595)	1,277
Cash flow hedge derivatives, Total other comprehensive income, Tax expense	(930)	1,689	(3,193)	537
Cash flow hedge derivatives, Total other comprehensive income, Net-of-tax	(1,282)	2,328	(4,402)	740
Total Other Comprehensive Income (Loss), Pre-tax	3,821	(3,685)	16,508	4,807
Total other comprehensive income, Tax expense	1,606	(1,549)	6,940	2,020
Total other comprehensive income, Net-of-tax	2,215	(2,136)	9,568	2,787	9,600
Securities available-for sale, Ending balance, net of tax	8,539	(1,125)	8,539	(1,125)	(5,431)
Cash flow hedge derivatives, Ending balance, net of tax	(7,397)	(1,657)	(7,397)	(1,657)	(2,995)
Total, Ending balance, net of tax	$ 1,142	$ (2,782)	$ 1,142	$ (2,782)	$ (8,426)