Note 5 - Earnings Per Common Share (Details) - Weighted Average Common Shares (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Numerator
Net income	$ 11,641	$ 11,094
Preferred stock dividends	(138)	(138)
Net income applicable to common shares for basic and diluted earnings per share	$ 11,503	$ 10,956
Denominator
Basic weighted average common shares	342,666	285,171
Dilutive stock options and restricted stock	7,352	11,993
Diluted weighted average common shares	350,018	297,164
Basic earnings per common share
Net income applicable to common shares	$ 0.03	$ 0.04
Diluted earnings per common share
Net income applicable to common shares	$ 0.03	$ 0.04