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Earnings Per Share | 12 Months Ended
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Dec. 31, 2015
Earnings Per Share [Abstract] |
Earnings Per Share | 14. Earnings Per Share The Company reports basic and diluted earnings per share. Basic earnings per share is computed by dividing net income attributable to shareholders of the Company by the weighted average number of common shares outstanding during the reported period. Diluted earnings per share reflect the potential dilution related to equity-based incentives using the treasury stock method. The calculation and reconciliation of basic and diluted earnings per share for the years ended December 31 (in thousands, except per share data) follows:
|  | 2015 |  |  | 2014 |  |  | 2013 |
Net income |  | $ | 362,431 |  |  | $ | 368,707 |  |  | $ | 284,501 |
Denominator for basic earnings per share |  |  | 92,023 |  |  |  | 84,317 |  |  |  | 81,793 |
Dilutive securities |  |  | 2,116 |  |  |  | 2,665 |  |  |  | 2,862 |
Denominator for diluted earnings per share |  |  | 94,139 |  |  |  | 86,982 |  |  |  | 84,655 |
Basic earnings per share |  | $ | 3.94 |  |  | $ | 4.37 |  |  | $ | 3.48 |
Diluted earnings per share |  |  | 3.85 |  |  |  | 4.24 |  |  |  | 3.36 |
Diluted earnings per share for the year ended December 31, 2015 excludes the effect of 1.4 million shares of common stock that may be issued upon the exercise of employee stock options because such effect would be antidilutive. There were no antidilutive shares for 2014 and 2013. Diluted earnings per share also excludes the effect of 0.2 million, 0.5 million and 0.3 million shares of performance based restricted stock for which the performance criteria have not yet been achieved for the years ended December 31, 2015, 2014 and 2013, respectively.

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