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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2015
Earnings Per Share [Abstract] |
Stock awards excluded from the calculation of diluted EPS |
|  | Year ended December 31,
|  | 2015 |  | 2014 |  | 2013
Stock awards subject to performance conditions |  |  | 266 |  |  | 385 |  |  | 381
Stock awards that were antidilutive |  |  | 289 |  |  | 232 |  |  | 393
Total stock awards excluded from diluted earnings per share |  |  | 555 |  |  | 617 |  |  | 774
Earnings Per Share |
|  | Year ended December 31,
|  | 2015 |  | 2014 |  | 2013
Net income |  | $ | 475,602 |  | $ | 445,374 |  | $ | 327,438
Shares: |  |  |  |  |  |  |  |  |
Weighted average number of common shares outstanding |  |  | 31,092 |  |  | 31,038 |  |  | 30,957
Dilutive stock awards |  |  | 402 |  |  | 474 |  |  | 324
Diluted weighted average number of common shares outstanding |  |  | 31,494 |  |  | 31,512 |  |  | 31,281
Basic earnings per share |  | $ | 15.30 |  | $ | 14.35 |  | $ | 10.58
Diluted earnings per share |  | $ | 15.10 |  | $ | 14.13 |  | $ | 10.47

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- Definition Stock awards excluded from the calculation of diluted EPS - consisting of awards subject to performance conditions and awards that were antidilutive. + References No definition available. + Details
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- References No definition available. + Details
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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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