Note 5 - Covered Assets (Detail) - Changes in Accretable Yield (USD $) In Thousands	3 Months Ended				9 Months Ended
	Sep. 30, 2011		Sep. 30, 2010		Sep. 30, 2011		Sep. 30, 2010
Balance at beginning of period	$ 55,606		$ 24,474		$ 63,616		$ 9,298
Additions			39,154				41,745
Accretion	(7,892)		(4,816)		(28,420)		(10,461)
Reclassifications (to) from non-accretable difference, net (1)	(2,657)	[1]		[1]	9,861	[1]	18,230	[1]
Balance at end of period	$ 45,057		$ 58,812		$ 45,057		$ 58,812

[1] Amount represents an increase in the estimated cash flows to be collected on those loans showing improvement in the underlying portfolio.