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Earnings Per Share | 6 Months Ended
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Jun. 30, 2018
Earnings Per Share [Abstract] |
Earnings Per Share | Earnings Per Share Earnings Per Share The following table sets forth the computation of earnings per common share and earnings per common share - assuming dilution:
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2018 |  | 2017 |  | 2018 |  | 2017
| (Dollars in thousands, except share and per share data)
Numerator: |  |  |  |  |  |  |
Net income - numerator for earnings per common share | $ | 93,903 |  |  | $ | 26,946 |  |  | $ | 234,865 |  |  | $ | 80,885 |
Denominator: |  |  |  |  |  |  |
Weighted average common shares outstanding | 90,326,747 |  |  | 88,897,203 |  |  | 90,172,812 |  |  | 88,772,831 |
Effect of dilutive securities: |  |  |  |  |  |  |
Stock options and deferred compensation agreements | 696,007 |  |  | 850,870 |  |  | 773,149 |  |  | 899,594 |
Restricted stock and restricted stock units | 248,094 |  |  | 364,211 |  |  | 259,992 |  |  | 372,214 |
Denominator for earnings per common share - assuming dilution | 91,270,848 |  |  | 90,112,284 |  |  | 91,205,953 |  |  | 90,044,639 |
Earnings per common share | $ | 1.04 |  |  | $ | 0.30 |  |  | $ | 2.60 |  |  | $ | 0.91 |
Earnings per common share - assuming dilution | $ | 1.03 |  |  | $ | 0.30 |  |  | $ | 2.58 |  |  | $ | 0.90 |
There were no options to purchase shares of our common stock outstanding excluded from the computation of diluted earnings per share during the three and six months ended June 30, 2018, as the exercise price of all options outstanding was less than the average market price of our common shares for those periods. During the three and six months ended June 30, 2017, there were 1,002,391 options to purchase shares of our common stock outstanding, with an exercise price of $24.79, excluded from the computation of diluted earnings per share.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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