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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2017
Earnings Per Share [Abstract] |
Calculation Of Basic And Diluted Earnings (Loss) Per Common Share | The following tables summarize our calculation of Basic and Diluted Earnings (Loss) per Common Share (“EPS”) for the years ended December 31, 2017, 2016 and 2015 (in thousands, except share and per share data):
| 2017 |  | 2016 |  | 2015
Numerator: |  |  |  |  |
Income from continuing operations attributable to EMCOR Group, Inc. common stockholders | $ | 228,053 |  |  | $ | 185,077 |  |  | $ | 172,346 |
Loss from discontinued operation, net of income taxes | (857 | ) |  | (3,142 | ) |  | (60 | )
Net income attributable to EMCOR Group, Inc. common stockholders | $ | 227,196 |  |  | $ | 181,935 |  |  | $ | 172,286 |
Denominator: |  |  |  |  |
Weighted average shares outstanding used to compute basic earnings (loss) per common share | 59,254,256 |  |  | 60,769,808 |  |  | 62,789,120 |
Effect of dilutive securities—Share-based awards | 364,713 |  |  | 436,984 |  |  | 518,392 |
Shares used to compute diluted earnings (loss) per common share | 59,618,969 |  |  | 61,206,792 |  |  | 63,307,512 |
Basic earnings (loss) per common share: |  |  |  |  |
From continuing operations attributable to EMCOR Group, Inc. common stockholders | $ | 3.85 |  |  | $ | 3.05 |  |  | $ | 2.74 |
From discontinued operation | (0.01 | ) |  | (0.05 | ) |  | (0.00 | )
Net income attributable to EMCOR Group, Inc. common stockholders | $ | 3.84 |  |  | $ | 3.00 |  |  | $ | 2.74 |
Diluted earnings (loss) per common share: |  |  |  |  |
From continuing operations attributable to EMCOR Group, Inc. common stockholders | $ | 3.83 |  |  | $ | 3.02 |  |  | $ | 2.72 |
From discontinued operation | (0.01 | ) |  | (0.05 | ) |  | (0.00 | )
Net income attributable to EMCOR Group, Inc. common stockholders | $ | 3.82 |  |  | $ | 2.97 |  |  | $ | 2.72 |

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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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