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Note 11 - Net Income per Common Share (Details) - Net Income Per Common Share Calculation (USD $)
In Thousands, except Per Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Net Income Per Common Share Calculation [Abstract]      
Net income available to common shareholders (in Dollars) $ 46,441 $ 34,723 $ 23,047
Average common shares outstanding 25,726 23,136 21,819
Adjustment for common share equivalents 633 608 498
Average common shares outstanding-diluted 26,359 23,744 22,317
Diluted net income per common share (in Dollars per share) $ 1.76 $ 1.46 $ 1.04
Anti-dilutive shares 35,079 131,182 218,620
Basic net income per common share (in Dollars per share) $ 1.81 $ 1.50 $ 1.05