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Reconciliation of Basic and Diluted Shares
 3 Months Ended
Mar. 31, 2017
Earnings Per Share [Abstract]  
Reconciliation of Basic and Diluted Shares
Reconciliation of Basic and Diluted Shares
 
 
Three Months Ended
 
 
March 31
(In thousands, except per share amounts)
 
2017
 
2016
Income (loss) from continuing operations attributable to Harsco Corporation common stockholders
 
$
9,267

 
$
(10,550
)
 
 
 
 
 
Weighted-average shares outstanding - basic
 
80,385

 
80,238

Dilutive effect of stock-based compensation
 
1,878

 
—

Weighted-average shares outstanding - diluted
 
82,263

 
80,238

 
 
 
 
 
Earnings (loss) from continuing operations per common share, attributable to Harsco Corporation common stockholders:
Basic
 
$
0.12

 
$
(0.13
)
 
 
 
 
 
Diluted
 
$
0.11

 
$
(0.13
)


The following average outstanding stock-based compensation units were not included in the computation of diluted earnings (loss) per share because the effect was antidilutive:
 
 
Three Months Ended
 
 
March 31
(In thousands)
 
2017
 
2016
Restricted stock units
 
—

 
430

Stock options
 
55

 
90

Stock appreciation rights
 
1,263

 
1,088

Performance share units
 
467

 
309