Earnings (Loss) Per Share (Tables)

12 Months Ended

Jun. 30, 2012

Earnings (Loss) Per Share [Abstract]

Reconciliation of the amounts used to compute basic and diluted earnings per common share

The reconciliation of the amounts used to compute basic and diluted earnings per common share for the years ended June 30, 2012, 2011, and 2010 is as follows:

	2012		2011		2010
Basic earnings per share computation
Numerator:
Net income attributable to Globe Specialty Metals, Inc.	$	54,570		52,808		34,101
Denominator:
Weighted average basic shares outstanding		75,038,674		74,924,947		73,511,696
Basic earnings per common share	$	0.73		0.70		0.46
Diluted earnings per share computation
Numerator:
Net income attributable to Globe Specialty Metals, Inc.	$	54,570		52,808		34,101
Denominator:
Weighted average basic shares outstanding		75,038,674		74,924,947		73,511,696
Effect of dilutive securities		1,585,218		1,699,398		1,258,451
Weighted average diluted shares outstanding		76,623,892		76,624,345		74,770,147
Diluted earnings per common share	$	0.71		0.69		0.46

Potentially anti-dilutive common shares excluded from the calculation of diluted earnings

The following potential common shares were excluded from the calculation of diluted earnings per common share because their effect would be anti-dilutive:

	2012		2011		2010
Stock options		1,101,079		66,667		160,000