Reconciliation of Basic and Diluted Shares (Tables)

3 Months Ended

Mar. 31, 2016

Earnings Per Share [Abstract]

Reconciliation of basic and diluted shares

	Three Months Ended
	March 31
(In thousands, except per share amounts)	2016			2015
Income (loss) from continuing operations attributable to Harsco Corporation common stockholders	$	(10,550	)	$	15,671
Weighted-average shares outstanding - basic	80,238			80,240
Dilutive effect of stock-based compensation	—			112
Weighted-average shares outstanding - diluted	$	80,238		$	80,352
Earnings (loss) from continuing operations per common share, attributable to Harsco Corporation common stockholders:
Basic	$	(0.13	)	$	0.20
Diluted	$	(0.13	)	$	0.20

Schedule of antidilutive securities excluded from computation of earnings per share

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)	2016	2015
Restricted stock units	430	—
Stock options	90	114
Stock appreciation rights	1,088	864
Performance share units	309	122