Note 16 - Stockholders' Equity - Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Securities available-for sale, Pre-tax	$ 1,618	$ 4,717	$ 27,170	$ 4,895
Securities available-for sale, Tax expense	680	1,984	11,422	2,058
Unrealized holding gain on securities available-for-sale	938	2,733	15,748	2,837
Securities available-for sale, Reclassification adjustment, Pre-tax	(1,692)	16	(3,141)	3,369
Securities available-for sale, Reclassification adjustment, Tax expense	(711)	6	(1,320)	1,416
Less: reclassification adjustments for gains/(losses) included in net income	(981)	10	(1,821)	1,953
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Cash flow hedge derivatives, Pre-tax	1,387	(4,413)	(6,208)	(3,137)
Cash flow hedge derivatives, Tax expense	583	(1,855)	(2,610)	(1,319)
Unrealized holding gain/(loss) on cash flow hedge derivatives	804	(2,558)	(3,598)	(1,818)
Securities available-for sale, Beginning balance, net of tax	8,539	(1,125)	(5,431)	(3,172)
Cash flow hedge derivatives, Beginning balance, net of tax	(7,397)	(1,657)	(2,995)	(2,397)
Total, Beginning balance, net of tax	1,142	(2,782)	(8,426)	(5,569)
Unrealized holding gain on securities available-for-sale	938	2,733	15,748	2,837
Unrealized holding gain/(loss) on cash flow hedge derivatives	804	(2,558)	(3,598)	(1,818)
Total, Pre-tax	3,005	304	20,962	1,758
Total, Tax expense	1,263	129	8,812	739
Total, Net-of-tax	1,742	175	12,150	1,019
Less: reclassification adjustments for gains/(losses) included in net income	981	(10)	1,821	(1,953)
Total, Reclassification adjustment, Pre-tax	(1,692)	16	(3,141)	3,369
Total, Reclassification adjustment, Tax expense	(711)	6	(1,320)	1,416
Total, Reclassification adjustment, Net-of-tax	(981)	10	(1,821)	1,953
Securities available-for sale, Total other comprehensive income, Pre-tax	(74)	4,733	24,029	8,264
Securities available-for sale, Total other comprehensive income, Tax expense	(31)	1,990	10,102	3,474
Securities available-for sale, Total other comprehensive income, Net-of-tax	(43)	2,743	13,927	4,790
Cash flow hedge derivatives, Total other comprehensive income, Pre-tax	1,387	(4,413)	(6,208)	(3,137)
Cash flow hedge derivatives, Total other comprehensive income, Tax expense	583	(1,855)	(2,610)	(1,319)
Cash flow hedge derivatives, Total other comprehensive income, Net-of-tax	804	(2,558)	(3,598)	(1,818)
Total Other Comprehensive Income (Loss), Pre-tax	1,313	320	17,821	5,127
Total other comprehensive income, Tax expense	552	135	7,492	2,155
Total other comprehensive income, Net-of-tax	761	185	10,329	2,972
Securities available-for sale, Ending balance, net of tax	8,496	1,618	8,496	1,618
Cash flow hedge derivatives, Ending balance, net of tax	(6,593)	(4,215)	(6,593)	(4,215)
Total, Ending balance, net of tax	$ 1,903	$ (2,597)	$ 1,903	$ (2,597)