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Earnings per Share | 9 Months Ended
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Sep. 30, 2018
Earnings Per Share [Abstract] |
Earnings per Share |
6. | Earnings per Share
Basic earnings per share is computed by dividing net income attributable to shareholders by the weighted average number of shares of common stock and vested deferred stock units outstanding during the year. The computation of diluted earnings per share is similar to the computation of basic earnings per share, except that the denominator is increased for the assumed exercise of dilutive options, the assumed issuance of unvested restricted stock units and deferred stock units, and unvested performance-based awards for which the performance condition has been met as of the date of determination using the treasury stock method unless the effect is anti-dilutive. The treasury stock method assumes that proceeds, including cash received from the exercise of employee stock options and the average unrecognized compensation expense for unvested share-based compensation awards, would be used to purchase the Company’s common stock at the average market price during the period. The following table summarizes net income attributable to shareholders and reconciles basic and diluted shares outstanding used in the earnings per share computations:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
(In thousands) | 2018 |  | 2017 |  | 2018 |  | 2017
Net income attributable to shareholders | $ | 57,322 |  |  | $ | 33,971 |  |  | $ | 145,253 |  |  | $ | 80,462 |
Weighted average common shares outstanding – Basic | 43,191 |  |  | 43,014 |  |  | 43,141 |  |  | 42,963 |
Dilutive impact of share-based compensation awards | 424 |  |  | 87 |  |  | 417 |  |  | 129 |
Weighted average common shares outstanding – Diluted | 43,615 |  |  | 43,101 |  |  | 43,558 |  |  | 43,092 |
For the three and nine months ended September 30, 2018 and September 30, 2017, an immaterial number of outstanding share-based compensation awards were excluded from the computation of diluted earnings per share, as the effect of including these awards would be anti-dilutive.

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