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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2017
Earnings Per Share [Abstract] |
Schedule of basic and diluted earnings per common share from continuing operations | The following table presents the calculation of basic and diluted earnings per common share from continuing operations:
|  | Years ended December 31,
|  | 2017 |  | 2016 |  | 2015
|  | (In thousands, except per share amounts)
Earnings per share — Basic: |  |  |  |  |  |
Earnings from continuing operations |  | $ | 791,015 |  |  | 264,640 |  |  | 305,989 |
Less: Distributed and undistributed earnings allocated to unvested stock |  | (2,848 | ) |  | (840 | ) |  | (877 | )
Earnings from continuing operations available to common shareholders — Basic |  | $ | 788,167 |  |  | 263,800 |  |  | 305,112 |
Weighted average common shares outstanding— Basic |  | 52,613 |  |  | 53,015 |  |  | 52,814 |
Earnings from continuing operations per common share — Basic |  | $ | 14.98 |  |  | 4.98 |  |  | 5.78 |
Earnings per share — Diluted: |  |  |  |  |  |
Earnings from continuing operations |  | $ | 791,015 |  |  | 264,640 |  |  | 305,989 |
Less: Distributed and undistributed earnings allocated to unvested stock |  | (2,830 | ) |  | (836 | ) |  | (872 | )
Earnings from continuing operations available to common shareholders — Diluted |  | $ | 788,185 |  |  | 263,804 |  |  | 305,117 |
Weighted average common shares outstanding— Basic |  | 52,613 |  |  | 53,015 |  |  | 52,814 |
Effect of dilutive equity awards |  | 375 |  |  | 346 |  |  | 446 |
Weighted average common shares outstanding— Diluted |  | 52,988 |  |  | 53,361 |  |  | 53,260 |
Earnings from continuing operations per common share — Diluted |  | $ | 14.87 |  |  | 4.94 |  |  | 5.73 |
Anti-dilutive equity awards and market-based restrictive stock rights not included above |  | 881 |  |  | 716 |  |  | 392 |

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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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