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Note 6 - Earnings Per Share - Earnings Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Net income $ 88,978 $ 77,199 $ 164,006 $ 150,583
Basic weighted-average number of common shares outstanding (in shares) 74,958,913 79,167,004 75,144,414 79,347,886
Dilutive effect of weighted-average outstanding common share equivalents RSUs (in shares) 311,227 251,664 349,102 276,458
Diluted weighted-average number of common shares outstanding (in shares) 75,270,140 79,418,668 75,493,516 79,624,344
Average restricted stock units with anti-dilutive effect (in shares) 108,211 19,170 65,629 44,996
Basic (in dollars per share) $ 1.19 $ 0.98 $ 2.18 $ 1.90
Diluted (in dollars per share) $ 1.18 $ 0.97 $ 2.17 $ 1.89