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Earnings Per Share and Capital Stock (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Basic |  |  |  |
Net Income |  | $ 59,743 | $ 60,484 | $ 61,058
Less: Distributed earnings to common shareholders |  | 33,408 | 32,690 | 32,125
Less: Distributed earnings to participating securities |  | 187 | 207 | 177
Undistributed earnings |  | 26,148 | 27,587 | 28,756
Undistributed earnings allocated to common shareholders |  | 26,003 | 27,414 | 28,599
Undistributed earnings allocated to participating securities |  |  | 173 | 157
Total income available to common shareholders, basic |  | $ 59,411 | $ 60,104 | $ 60,724
Weighted average Common Shares outstanding, basic |  | 36,552,000 | 37,389,000 | 38,658,000
Basic earnings per Common Share: |  |  |  |
Income from continuing operations (in dollars per share) |  | $ 1.63 | $ 1.61 | $ 1.57
Net Income (in dollars per share) |  | $ 1.63 | $ 1.61 | $ 1.57
Diluted |  |  |  |
Total income available to common shareholders, basic |  | $ 59,411 | $ 60,104 | $ 60,724
Undistributed earnings for dilutive stock options |  | 145 | 173 | 157
Total common shareholders earnings, diluted |  | $ 59,556 | $ 60,277 | $ 60,881
Weighted average Common Shares outstanding, basic |  | 36,552,000 | 37,389,000 | 38,658,000
Stock-based compensation (in shares) | [1] | 198,000 | 225,000 | 222,000
Weighted average common shares outstanding, diluted |  | 36,750,000 | 37,614,000 | 38,880,000
Diluted earnings per Common Share: |  |  |  |
Income from continuing operations (in dollars per share) |  | $ 1.62 | $ 1.60 | $ 1.57
Net Income (in dollars per share) |  | $ 1.62 | $ 1.60 | $ 1.57
Stock option and restricted stock option outstanding |  |  |  |
Options outstanding (in shares) |  | 136,560 |  |
Restricted Stock Units |  |  |  |
Share based compensation arrangement |  |  |  |
Restricted stock units outstanding (in shares) |  | 209,932 |  |
[1] | (1) In applying the treasury stock method of reflecting the dilutive effect of outstanding stock-based compensation in the calculation of diluted EPS, 136,560 stock options and 209,932 restricted stock units, including performance awards, at December 31, 2016 were deemed to be outstanding in accordance with accounting guidance on earnings per share.

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