Note 12 - Fair Value (Detail) - Rollforward Carrying Value of CDO's (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012	Jun. 30, 2011
Balance at beginning of period	$ 13,685		$ 16,193		$ 13,394	$ 14,858
Included in earnings (1)	(1,405)	[1]		[1]	(2,126)
Included in other comprehensive income (2)	(1,198)	[2]	294	[2]	(186)	1,629
Balance at end of period	11,082		16,487		11,082	16,487
Change in unrealized losses recognized in earnings related to securities still held at end of period	$ (1,405)				$ (2,126)

[1] Included in net securities gains (losses) in the Condensed Consolidated Statements of Income and related to securities still held at the end of the period.

[2] Included in unrealized holding gains in the Consolidated Statements of Comprehensive Income.