Reconciliation of Basic and Diluted Shares (Tables)

3 Months Ended

Mar. 31, 2014

Earnings Per Share [Abstract]

Reconciliation of basic and diluted shares

	Three Months Ended
	March 31
(In thousands, except per share amounts)	2014		2013
Income from continuing operations attributable to Harsco Corporation common stockholders	$	11,542	$	7,642
Weighted-average shares outstanding - basic	80,816		80,706
Dilutive effect of stock-based compensation	206		224
Weighted-average shares outstanding - diluted	81,022		80,930
Earnings from continuing operations per common share, attributable to Harsco Corporation common stockholders:
Basic	$	0.14	$	0.09
Diluted	$	0.14	$	0.09

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)	2014	2013
Stock options	215	304
Stock appreciation rights	15	—