Capital Stock (Tables)

12 Months Ended

Dec. 31, 2012

The Board of Directors has authorized the repurchase of shares of common stock as follows:



	Shares Authorized to be Purchased January 1	Additional Shares Authorized for Purchase	Shares Purchased	Remaining Shares Authorized for Purchase December 31
2010	2,000,000	—	—	2,000,000
2011	2,000,000	—	286,577	1,713,423
2012	1,713,423	—	—	1,713,423

Schedule of Common Stock Outstanding Roll Forward

The following table summarizes the Company's common stock:



	Common Stock
	Shares Issued	Treasury Shares	Outstanding Shares
Outstanding, January 1, 2010	111,387,185	31,034,126	80,353,059
Stock Options Exercised	115,493	24,008	91,485
Vested Restricted Stock Units	108,424	38,909	69,515
Outstanding, December 31, 2010	111,611,102	31,097,043	80,514,059
Stock Options Exercised	199,032	41,974	157,058
Vested Restricted Stock Units	121,133	28,503	92,630
Treasury Shares Purchased	—	286,577	(286,577	)
Outstanding, December 31, 2011	111,931,267	31,454,097	80,477,170
Stock Options Exercised	38,900	—	38,900
Vested Restricted Stock Units	45,898	14,677	31,221
Other Stock Grants	47,873	10,536	37,337
Outstanding, December 31, 2012	112,063,938	31,479,310	80,584,628

Schedule of Earnings Per Share, Basic and Diluted

The following is a reconciliation of the average shares of common stock used to compute basic earnings per common share to the shares used to compute diluted earnings per common share as shown in the Consolidated Statements of Operations:



(Amounts in thousands, except per share data)	2012			2011			2010
Income (loss) from continuing operations attributable to Harsco Corporation common stockholders	$	(253,693	)	$	(9,447	)	$	10,885

Weighted-average shares outstanding—basic	80,632			80,736			80,569
Dilutive effect of stock-based compensation	—			—			192
Weighted-average shares outstanding—diluted	80,632			80,736			80,761
Earnings (loss) from continuing operations per common share, attributable to Harsco Corporation common stockholders:
Basic	$	(3.15	)	$	(0.12	)	$	0.14

Diluted	$	(3.15	)	$	(0.12	)	$	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 computation of diluted earnings per share because the effect was antidilutive:



(In thousands)	2012	2011	2010
Restricted stock units	148	64	9
Stock options	389	755	—
Stock appreciation rights	530	—	—
Other stock-based compensation units	317	554	—