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EARNINGS PER SHARE (Tables) | 12 Months Ended
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Dec. 31, 2012
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,
| 2012 |  | 2011 |  | 2010
Numerator: |  |  |  |  |
Net income | $ | 257,411 |  |  | $ | 217,186 |  |  | $ | 130,244 |
Denominator: |  |  |  |  |
Basic weighted average shares outstanding | 83,087 |  |  | 83,681 |  |  | 84,407 |
Effect of dilutive securities - Stock options and awards | 1,088 |  |  | 1,027 |  |  | 816 |
Diluted weighted average shares outstanding | 84,175 |  |  | 84,708 |  |  | 85,223 |
Basic earnings per share | $ | 3.10 |  |  | $ | 2.60 |  |  | $ | 1.54 |
Diluted earnings per share | $ | 3.06 |  |  | $ | 2.56 |  |  | $ | 1.53 |

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- Definition Tabular disclosure of the numerators and the denominators of the basic and diluted per-share (or per-unit) computations for income from continuing operations, including the effect that has been given to preferred dividends. + References Reference 1: 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 + Details
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