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Note 12 - Earnings Per Share (Details) - Earnings Per Share Calculation (USD $)
In Thousands, except Per Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Numerator for basic and diluted earnings per share-      
Net income available to common shareholders (in Dollars) $ 49,217 $ 62,455 $ 55,213
Denominator-      
Denominator for basic earnings per share, weighted average shares 39,405 38,643 37,861
Effect of dilutive securities-      
Stock options and restricted shares 1,101 1,045 1,154
Denominator for diluted earnings per share, adjusted weighted average shares and assumed conversions 40,506 39,688 39,015
Basic earnings per common share (in Dollars per share) $ 1.25 $ 1.62 $ 1.46
Diluted earnings per common share and common share equivalents (in Dollars per share) $ 1.22 $ 1.57 $ 1.42