Reconciliation of Basic and Diluted Shares (Tables)

3 Months Ended

Mar. 31, 2015

Earnings Per Share [Abstract]

Reconciliation of basic and diluted shares

	Three Months Ended
	March 31
(In thousands, except per share amounts)	2015		2014
Income from continuing operations attributable to Harsco Corporation common stockholders	$	15,671	$	10,614
Weighted-average shares outstanding - basic	80,240		80,816
Dilutive effect of stock-based compensation	112		206
Weighted-average shares outstanding - diluted	$	80,352	$	81,022
Earnings from continuing operations per common share, attributable to Harsco Corporation common stockholders:
Basic	$	0.20	$	0.13
Diluted	$	0.20	$	0.13

Schedule of antidilutive securities excluded from computation of earnings per share

The following average outstanding stock-based compensation units were not included in the three months ended computation of diluted earnings per share because the effect was antidilutive:

	Three Months Ended
	March 31
(In thousands)	2015	2014
Stock options	114	215
Stock appreciation rights	864	15
Performance share units	122	—