Reconciliation of Basic and Diluted Shares (Tables)

9 Months Ended

Sep. 30, 2015

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)	2015			2014		2015		2014
Income (loss) from continuing operations attributable to Harsco Corporation common stockholders	$	(8,254	)	$	25,000	$	13,719	$	21,912
Weighted-average shares outstanding - basic	80,238			80,918		80,233		80,873
Dilutive effect of stock-based compensation	—			181		130		220
Weighted-average shares outstanding - diluted	$	80,238		$	81,099	$	80,363	$	81,093
Earnings (loss) from continuing operations per common share, attributable to Harsco Corporation common stockholders:
Basic	$	(0.10	)	$	0.31	$	0.17	$	0.27
Diluted	$	(0.10	)	$	0.31	$	0.17	$	0.27

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		Nine Months Ended
	September 30		September 30
(In thousands)	2015	2014	2015	2014
Restricted stock units	441	—	—	103
Stock options	90	200	101	210
Stock appreciation rights	1,265	372	1,156	453
Performance share units	322	136	265	78