Note 22 - Fair Value (Detail) - Carrying Value of Level 3 Securities Available-for-Sale (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2009		Dec. 31, 2011 Collateralized Debt Obligations 2010 [Member]		Dec. 31, 2010 Mortgage-Backed Securities 2009 [Member]		Dec. 31, 2009 Collateralized Debt Obligations 2009 [Member]		Dec. 31, 2009 Total Year 2009 [Member]
Balance at beginning of year	$ 58,718		$ 14,858		$ 11,728		$ 16,632		$ 42,086
Balance at end of year	11,728		13,394		14,858				11,728
Change in unrealized losses recognized in earnings relating to securities still held at end of period	(24,509)		(936)		(4,664)				(24,509)
Change in unrealized losses recognized in earnings relating to securities still held at end of period	(24,509)		(936)		(4,664)				(24,509)
Included in earnings (1)	(24,509)	[1]	(936)	[1]	(4,664)	[1]	-	[1]	(24,509)	[1]
Included in other comprehensive income (loss)	(5,268)		(528)		7,794		566		(5,834)
Included in other comprehensive income (loss)	(5,268)		(528)		7,794		566		(5,834)
Included in other comprehensive income (loss)	(5,268)		(528)		7,794		566		(5,834)
Principal paydowns	(1,612)						(1,590)		(22)
Principal paydowns	(1,612)						(1,590)		(22)
Principal paydowns	(1,612)						(1,590)		(22)
Accretion	5						(2)		7
Accretion	5						(2)		7
Transfer out of Level 3 (2)	(15,606)	[2]		[2]		[2]	(15,606)	[2]		[2]
Transfer out of Level 3 (2)	(15,606)	[2]		[2]		[2]	(15,606)	[2]		[2]
Transfer out of Level 3 (2)	$ (15,606)	[2]		[2]		[2]	$ (15,606)	[2]		[2]

[1] Included in securities gains, net in the Consolidated Statements of Income and related to securities still held at the end of the year.

[2] The transfer out of level 3 represents securities that were manually priced using broker quotes (a level 3 input) at the beginning of the year, but valued by an external pricing service using level 2 inputs at the end of the year.