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Earnings Per Share and Capital Stock (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Basic |  |  |  |
Net Income |  | $ 60,484 | $ 61,058 | $ 62,686
Less: Distributed earnings to common shareholders |  | 32,690 | 32,125 | 29,366
Less: Distributed earnings to participating securities |  | 207 | 177 | 171
Undistributed earnings |  | 27,587 | 28,756 | 33,149
Undistributed earnings allocated to common shareholders |  | 27,414 | 28,599 | 32,958
Undistributed earnings allocated to participating securities |  |  | 157 | 191
Total income available to common shareholders, basic |  | $ 60,104 | $ 60,724 | $ 62,324
Weighted average Common Shares outstanding, basic |  | 37,389,000 | 38,658,000 | 38,639,000
Basic earnings per Common Share: |  |  |  |
Income from continuing operations (in dollars per share) |  | $ 1.61 | $ 1.57 | $ 1.61
Net Income (in dollars per share) |  | $ 1.61 | $ 1.57 | $ 1.61
Diluted |  |  |  |
Total income available to common shareholders, basic |  | $ 60,104 | $ 60,724 | $ 62,324
Undistributed earnings for dilutive stock options |  | 173 | 157 | 191
Total common shareholders earnings, diluted |  | $ 60,277 | $ 60,881 | $ 62,515
Weighted average Common Shares outstanding, basic |  | 37,389,000 | 38,658,000 | 38,639,000
Stock-based compensation (in shares) | [1] | 225,000 | 222,000 | 230,000
Weighted average common shares outstanding, diluted |  | 37,614,000 | 38,880,000 | 38,869,000
Diluted earnings per Common Share: |  |  |  |
Income from continuing operations (in dollars per share) |  | $ 1.60 | $ 1.57 | $ 1.61
Net Income (in dollars per share) |  | $ 1.60 | $ 1.57 | $ 1.61
Stock option and restricted stock option outstanding |  |  |  |
Options outstanding (in shares) |  | 150,606 |  |
Restricted Stock Units |  |  |  |
Share based compensation arrangement |  |  |  |
Restricted stock units outstanding (in shares) |  | 243,288 |  |
[1] | (1) In applying the treasury stock method of reflecting the dilutive effect of outstanding stock-based compensation in the calculation of diluted EPS, 150,606 stock options and 243,288 restricted stock units, including performance awards, at December 31, 2015 were deemed to be outstanding in accordance with accounting guidance on earnings per share.

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