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EARNINGS PER SHARE (Tables) | 12 Months Ended
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Dec. 31, 2017
Earnings Per Share [Abstract] |
Computation of basic and diluted earnings per share | The following table sets forth the computation of basic and diluted earnings per share:
| Year Ended December 31,
| 2017 |  | 2016 |  | 2015
Numerator: |  |  |  |  |
Net income | $ | 247,503 |  |  | $ | 198,399 |  |  | $ | 127,478 |
Denominator: |  |  |  |  |
Basic weighted average shares outstanding | 65,739 |  |  | 67,462 |  |  | 74,111 |
Effect of dilutive securities - Stock options and awards | 904 |  |  | 694 |  |  | 743 |
Diluted weighted average shares outstanding | 66,643 |  |  | 68,156 |  |  | 74,854 |
Basic earnings per share | $ | 3.76 |  |  | $ | 2.94 |  |  | $ | 1.72 |
Diluted earnings per share | $ | 3.71 |  |  | $ | 2.91 |  |  | $ | 1.70 |

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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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