Note 18 - Fair Value Measurements (Detail) - Quantitative Information About Unobservable Inputs for Assets Measured on A Nonrecurring Basis Using Level 3 Measurements (Fair Value, Inputs, Level 3 [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012 Impaired Loans [Member]	Dec. 31, 2012 OREO [Member]	Dec. 31, 2012	Dec. 31, 2011
Impaired loans (in Dollars)	$ 23,843		$ 979,301	$ 1,043,824
Impaired loans	Discounted appraisals	Discounted appraisals
Impaired loans	Marketability discount	Marketability discount
Impaired loans	0.80%	0.30%
Impaired loans	32.00%	71.40%
Impaired loans	8.70%	7.60%
OREO (in Dollars)		$ 21,182
OREO	Discounted appraisals	Discounted appraisals
OREO	Marketability discount	Marketability discount
OREO	0.80%	0.30%
OREO	32.00%	71.40%
OREO	8.70%	7.60%