Note 16 - Stockholders' Equity (Details) - Accumulated Other Comprehensive Income - Three Months (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 Accumulated Net Unrealized Investment Gain (Loss) [Member]	Mar. 31, 2014 Accumulated Net Unrealized Investment Gain (Loss) [Member]	Dec. 31, 2013 Accumulated Net Unrealized Investment Gain (Loss) [Member]	Jun. 30, 2013 Accumulated Net Unrealized Investment Gain (Loss) [Member]	Mar. 31, 2013 Accumulated Net Unrealized Investment Gain (Loss) [Member]	Dec. 31, 2012 Accumulated Net Unrealized Investment Gain (Loss) [Member]	Jun. 30, 2014 Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Beginning balance, net of tax
Accumulated Other Comprenhensive Income, Net of Tax	$ (22,090,000)	$ 23,477,000	$ (29,729,000)	$ 465,000	$ (8,633,000)	$ (22,090,000)	$ (29,729,000)	$ (15,073,000)	$ 23,477,000	$ 465,000	$ (263,000)
Net unrealized losses arising during the period
Securities available-for sale	23,724,000	(54,334,000)	42,867,000	(46,391,000)
Securities available-for sale	9,974,000	(22,842,000)	18,023,000	(19,503,000)
Securities available-for sale	13,750,000	(31,492,000)	24,844,000	(4,833,000)
Cash flow hedge derivatives	(454,000)		(454,000)
Cash flow hedge derivatives	(191,000)		(191,000)
Cash flow hedge derivatives	(263,000)		(263,000)
Total	23,270,000	(54,334,000)	42,413,000	(46,391,000)
Total	9,783,000	(22,842,000)	17,832,000	(19,503,000)
Total	13,487,000	(31,492,000)	24,581,000	(26,888,000)
Reclassification adjustment for net gains/(losses) in net income
Securities available-for sale	(506,000)	(12,177,000)	(6,466,000)	(18,469,000)
Securities available-for sale	(213,000)	(5,119,000)	(2,718,000)	(7,764,000)
Securities available-for sale	(293,000)	(7,058,000)	(3,748,000)	(10,705,000)
Total	(506,000)	(12,177,000)	(6,466,000)	(18,469,000)
Total	(213,000)	(5,119,000)	(2,718,000)	(7,764,000)
Total	(293,000)	(7,058,000)	(3,748,000)	(10,705,000)
Total other comprehensive income
Securities available-for sale	23,218,000	(66,511,000)	36,401,000	(26,808,000)
Securities available-for sale	9,761,000	(27,961,000)
Securities available-for sale	13,457,000	(38,550,000)	21,096,000	(15,538,000)
Cash flow hedge derivatives	(454,000)		(454,000)
Cash flow hedge derivatives	(191,000)		(191,000)
Cash flow hedge derivatives	(263,000)		(263,000)
Total	22,764,000	(66,511,000)	35,947,000	(26,808,000)
Total	9,570,000	(27,961,000)	15,114,000	(11,270,000)
Total	13,194,000	(38,550,000)	20,833,000	(15,538,000)
Ending balance, net of tax
Accumulated Other Comprenhensive Income, Net of Tax	$ (8,896,000)	$ (15,073,000)	$ (8,896,000)	$ (15,073,000)	$ (8,633,000)	$ (22,090,000)	$ (29,729,000)	$ (15,073,000)	$ 23,477,000	$ 465,000	$ (263,000)