Note 16 - Stockholders' Equity (Details) - Accumulated Other Comprehensive Income - Nine Months (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 Accumulated Net Unrealized Investment Gain (Loss) [Member]	Jun. 30, 2014 Accumulated Net Unrealized Investment Gain (Loss) [Member]	Dec. 31, 2013 Accumulated Net Unrealized Investment Gain (Loss) [Member]	Sep. 30, 2013 Accumulated Net Unrealized Investment Gain (Loss) [Member]	Jun. 30, 2013 Accumulated Net Unrealized Investment Gain (Loss) [Member]	Dec. 31, 2012 Accumulated Net Unrealized Investment Gain (Loss) [Member]	Sep. 30, 2014 Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Beginning balance, (loss)/income net of tax
Accumulated Other Comprenhensive Income, Net of Tax	$ (8,896,000)	$ (15,073,000)	$ (29,729,000)	$ 465,000	$ (8,935,000)	$ (8,896,000)	$ (29,729,000)	$ (21,183,000)	$ (15,073,000)	$ 465,000	$ 100,000
Net unrealized gains/(losses) arising during the period
Securities available-for sale	292,000	(1,854,000)	43,157,000	(48,245,000)
Securities available-for sale	122,000	(780,000)	18,143,000	(20,282,000)
Securities available-for sale	170,000	(1,074,000)	25,014,000	(5,908,000)
Cash flow hedge derivatives	171,000		(281,000)
Cash flow hedge derivatives	71,000		(118,000)
Cash flow hedge derivatives	100,000		(163,000)
Total	463,000	(1,854,000)	42,876,000	(48,245,000)
Total	193,000	(780,000)	18,025,000	(20,282,000)
Total	270,000	(1,074,000)	24,851,000	(27,963,000)
Reclassification adjustment for net losses in net income
Securities available-for sale	(361,000)	(8,688,000)	(6,827,000)	(27,157,000)
Securities available-for sale	(152,000)	(3,652,000)	(2,870,000)	(11,417,000)
Securities available-for sale	(209,000)	(5,036,000)	(3,957,000)	(15,740,000)
Total	(361,000)	(8,688,000)	(6,827,000)	(27,157,000)
Total	(152,000)	(3,652,000)	(2,870,000)	(11,417,000)
Total	(209,000)	(5,036,000)	(3,957,000)	(15,740,000)
Net unrealized gains arising from transferring securities held-to-maturity to available-for-sale				38,052,000
Net unrealized gains arising from transferring securities held-to-maturity to available-for-sale				15,997,000
Net unrealized gains arising from transferring securities held-to-maturity to available-for-sale				22,055,000
Total other comprehensive income/(loss)
Securities available-for sale	(69,000)	(10,542,000)	36,330,000	(37,350,000)
Securities available-for sale			15,273,000	(15,702,000)
Securities available-for sale	(39,000)	(6,110,000)	21,057,000	(21,648,000)
Cash flow hedge derivatives	171,000		(281,000)
Cash flow hedge derivatives	71,000		(118,000)
Cash flow hedge derivatives	100,000		(163,000)
Total	102,000	(10,542,000)	36,049,000	(37,350,000)
Total	41,000	(4,432,000)	15,155,000	(15,702,000)
Total	61,000	(6,110,000)	20,894,000	(21,648,000)
Ending balance, loss net of tax
Accumulated Other Comprenhensive Income, Net of Tax	$ (8,835,000)	$ (21,183,000)	$ (8,835,000)	$ (21,183,000)	$ (8,935,000)	$ (8,896,000)	$ (29,729,000)	$ (21,183,000)	$ (15,073,000)	$ 465,000	$ 100,000