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Earnings Per Share (Tables)
 12 Months Ended
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