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Note 9 - Earnings Per Share - Dilutive Effect of Stock Options and Awards (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Net income $ 13,437 $ 11,545 $ 33,911 $ 28,619
Basic (in shares) 18,965 19,316 18,989 19,413
Dilutive effect of stock options and RSUs (in shares) 364 240 356 330
Weighted-average number of diluted shares outstanding during the period (in shares) 19,329 19,556 19,345 19,743
Basic (in dollars per share) $ 0.71 $ 0.60 $ 1.79 $ 1.47
Diluted (in dollars per share) $ 0.70 $ 0.59 $ 1.75 $ 1.45