Reconciliation of Basic and Diluted Shares (Tables)

9 Months Ended

Sep. 30, 2012

Earnings Per Share [Abstract]

Reconciliation of basic and diluted shares

	Three Months Ended				Nine Months Ended
	September 30				September 30
(In thousands, except per share amounts)	2012		2011		2012		2011
Income from continuing operations attributable to Harsco Corporation common stockholders	$	26,208	$	32,207	$	10,278	$	82,648
Weighted-average shares outstanding - basic	80,659		80,767		80,623		80,737
Dilutive effect of stock-based compensation	251		270		240		260
Weighted-average shares outstanding - diluted	80,910		81,037		80,863		80,997
Earnings from continuing operations per common share, attributable to Harsco Corporation common stockholders:
Basic	$	0.32	$	0.40	$	0.13	$	1.02
Diluted	$	0.32	$	0.40	$	0.13	$	1.02

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 and nine month computation of diluted earnings per share because the effect was antidilutive:

	Three Months Ended		Nine Months Ended
	September 30		September 30
(In thousands)	2012	2011	2012	2011
Restricted stock units	34	4	12	1
Stock options	349	589	381	198
Stock appreciation rights	291	—	309	—