Note 19 - Earnings Per Common Share (Detail) - Earnings per common share and diluted earnings per common share (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net income applicable to common equity (numerator) (in Dollars)	$ 81,127	$ 87,888	$ 94,577
Basic earnings per common share
Weighted average number of common shares outstanding - basic	27,654	28,628	29,166
Add exercise of options reduced by the number of shares that could have been purchased with the proceeds of such exercise	45	114	305
Weighted average number of common shares outstanding — diluted (denominator)	27,699	28,742	29,471
Diluted earnings per common share (in Dollars per share)	$ 2.93	$ 3.06	$ 3.21
Basic earnings per common share (in Dollars per share)	$ 2.93	$ 3.07	$ 3.24