Note 16 - Stockholders' Equity (Details) - Accumulated Other Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Accumulated Other Comprehensive Income [Abstract]
Beginning balance, net of tax	$ 23,477		$ 465
Ending balance, net of tax	(15,073)		(15,073)
Net unrealized losses arising during the period	(54,334)		(46,391)
Net unrealized losses arising during the period	(22,842)		(19,503)
Net unrealized losses arising during the period	(31,492)		(26,888)
Reclassification adjustment for net securities losses included in net income	(12,177)		(18,469)
Reclassification adjustment for net securities losses included in net income	(5,119)		(7,764)
Reclassification adjustment for net securities losses included in net income	(7,058)	(1,376)	(10,705)	(2,660)
Net unrealized gains arising from transferring securities held-to-maturity to available-for-sale	0		38,052
Net unrealized gains arising from transferring securities held-to-maturity to available-for-sale	0		15,997
Net unrealized gains arising from transferring securities held-to-maturity to available-for-sale	0		22,055
Total other comprehensive income	(66,511)		(26,808)
Total other comprehensive income	(27,961)		(11,270)
Total other comprehensive income	$ (38,550)	$ 849	$ (15,538)	$ 5,044