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EARNINGS PER SHARE (Tables) | 6 Months Ended
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Jun. 30, 2018
Earnings Per Share [Abstract] |
Schedule of computation of basic and diluted earnings per share | The following table sets forth the computation of basic and diluted earnings per share:
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2018 |  | 2017 |  | 2018 |  | 2017
Numerator: |  |  |  |  |  |  |  |  |  |  |
Net income | $ | 68,864 |  |  | $ | 61,352 |  |  | $ | 129,688 |  |  | $ | 117,196 |
Denominator (shares in 000's): |  |  |  |  |  |  |  |  |  |  |
Basic weighted average shares outstanding | 65,337 |  |  | 65,811 |  |  | 65,458 |  |  | 65,750 |
Effect of dilutive securities - Stock options and awards | 784 |  |  | 932 |  |  | 799 |  |  | 916 |
Diluted weighted average shares outstanding | 66,121 |  |  | 66,743 |  |  | 66,257 |  |  | 66,666 |
Basic earnings per share | $ | 1.05 |  |  | $ | 0.93 |  |  | $ | 1.98 |  |  | $ | 1.78 |
Diluted earnings per share | $ | 1.04 |  |  | $ | 0.92 |  |  | $ | 1.96 |  |  | $ | 1.76 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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