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Note 19 - Earnings Per Share - Reconciliation of Net Income and Shares Outstanding to Income and Number of Shares Used to Compute EPS (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Net income as reported, income $ 8,520 $ 8,012 $ 21,781 $ 28,534
Less: Earnings allocated to participating securities, income $ (9) $ 0 $ (29)
Shares outstanding, shares (in shares) 19,739,280 20,030,866 19,739,280 20,030,866
Impact of weighting shares, shares (in shares) (21,713) 36,981 60,337 32,613
Used in basic EPS, income $ 8,511 $ 8,012 $ 21,752 $ 28,534
Used in basic EPS, shares (in shares) 19,717,568 20,067,847 19,799,617 20,063,479
Stock options, shares (in shares) 87,324 358,119 158,994 372,388
Used in dilutive EPS, income $ 8,511 $ 8,012 $ 21,752 $ 28,534
Used in dilutive EPS, shares (in shares) 19,804,892 20,425,966 19,958,612 20,435,867
Basic (in dollars per share) $ 0.43 $ 0.40 $ 1.10 $ 1.42
Diluted (in dollars per share) $ 0.43 $ 0.39 $ 1.09 $ 1.40