Note 14 - Additional Cash Flow Information (Detail) - Additional Cash Flow Information (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Interest paid	$ 11,729	$ 16,109
Income taxes paid	10,965	11,625
Transfers of loans to foreclosed assets	4,321	18,247
Unsettled retirement of trust preferred securities	10,310
Covered by FDIC Loss Share Agreements [Member]
Transfers of loans acquired, covered by FDIC loss share, to foreclosed assets covered by FDIC loss share	$ 9,667	$ 10,369