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Earnings Per Share and Capital Stock (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Basic |  |  |  |
Net Income |  | $ 94,347 | $ 86,425 | $ 84,342
Less: Distributed earnings to common shareholders |  | 51,689 | 47,206 | 42,702
Less: Distributed earnings to participating securities |  | 134 | 158 | 180
Undistributed earnings |  | 42,524 | 39,061 | 41,460
Undistributed earnings allocated to common shareholders |  | 42,414 | 38,930 | 41,285
Undistributed earnings allocated to participating securities |  |  | 131 | 175
Total income available to common shareholders, basic |  | $ 94,103 | $ 86,136 | $ 83,987
Weighted average Common Shares outstanding, basic |  | 36,921,000 | 36,880,000 | 36,814,000
Basic earnings per Common Share: |  |  |  |
Earnings Per Share, Basic |  | $ 2.55 | $ 2.34 | $ 2.28
Diluted |  |  |  |
Total income available to common shareholders, basic |  | $ 94,103 | $ 86,136 | $ 83,987
Undistributed earnings for dilutive stock options |  | 110 | 131 | 175
Total common shareholders earnings, diluted |  | $ 94,213 | $ 86,267 | $ 84,162
Weighted average Common Shares outstanding, basic |  | 36,921,000 | 36,880,000 | 36,814,000
Stock-based compensation (in shares) | [1] | 89,000 | 115,000 | 150,000
Weighted average common shares outstanding, diluted |  | 37,010,000 | 36,995,000 | 36,964,000
Diluted earnings per Common Share: |  |  |  |
Earnings Per Share, Diluted |  | $ 2.55 | $ 2.33 | $ 2.28
Restricted Stock Units |  |  |  |
Share based compensation arrangement |  |  |  |
Restricted stock units outstanding (in shares) |  | 100,020 |  |
[1] | (1) In applying the treasury stock method of reflecting the dilutive effect of outstanding stock-based compensation in the calculation of diluted EPS, 100,020 restricted stock units, including performance awards, at December 31, 2021 were deemed to be outstanding in accordance with accounting guidance on earnings per share.

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