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Earnings Per Share | 6 Months Ended
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Jun. 30, 2016
Earnings Per Share [Abstract] |
Earnings Per Share | 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 three and six months ended June 30 (in thousands, except per share data) follows:
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
|  | 2016 |  | 2015 |  | 2016 |  | 2015
Net income |  | $ | 114,185 |  |  | $ | 98,678 |  |  | $ | 224,157 |  |  | $ | 192,831 |
Denominator for basic earnings per share |  | 92,665 |  |  | 91,904 |  |  | 92,591 |  |  | 91,828 |
Dilutive securities |  | 1,884 |  |  | 2,146 |  |  | 1,846 |  |  | 2,164 |
Denominator for diluted earnings per share |  | 94,549 |  |  | 94,050 |  |  | 94,437 |  |  | 93,992 |
Basic earnings per share |  | $ | 1.23 |  |  | $ | 1.07 |  |  | $ | 2.42 |  |  | $ | 2.10 |
Diluted earnings per share |  | $ | 1.21 |  |  | $ | 1.05 |  |  | $ | 2.37 |  |  | $ | 2.05 |
Diluted earnings per share for the three month period ended June 30, 2016 and 2015, respectively, excludes the effect of 1.5 million and 31 thousand shares of common stock that may be issued upon the exercise of employee stock options because such effect would be antidilutive. Diluted earnings per share also excludes the effect of 0.3 million and 0.5 million shares of performance based restricted stock for which the performance criteria have not yet been achieved for the three month period ended June 30, 2016 and 2015, respectively.

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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 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1278-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=32703322&loc=d3e4984-109258 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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