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Note 2 - Basic and Diluted Earnings Per Common Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Net income $ 8,193 $ 10,188
Basic earnings per common share - weighted-average shares (in shares) 32,454 33,458
Effect of dilutive stock options (in shares) 185 303
Diluted earnings per common share - weighted-average shares and assumed conversions (in shares) 32,639 33,761
Basic earnings per common share (in dollars per share) $ 0.25 $ 0.30
Diluted earnings per common share (in dollars per share) $ 0.25 $ 0.30