Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2011

Computation of basic and diluted earnings per share

The following table summarizes the computation of basic and diluted EPS:



	For the Year Ended December 31,
	2011			2010			2009
	(In thousands, except per share data)
Net income attributable to Amkor	$	91,808		$	231,971		$	155,980
Income allocated to participating securities	(332		)	(470		)	—
Net income available to Amkor common shareholders	91,476			231,501			155,980
Adjustment for dilutive securities on net income:
Net income allocated to participating securities in basic calculation	332			470			—
Interest on 2.5% convertible notes due 2011, net of tax	—			1,318			2,084
Interest on 6.25% convertible notes due 2013, net of tax	—			6,370			6,370
Interest on 6.0% convertible notes due 2014, net of tax	16,103			16,103			12,086
Net income attributable to Amkor — diluted	$	107,911		$	255,762		$	176,520

Weighted average shares outstanding — basic	190,829			183,312			183,067
Effect of dilutive securities:
Stock options	149			299			61
Unvested restricted shares	50			64			—
2.5% convertible notes due 2011	—			2,918			4,530
6.25% convertible notes due 2013	—			13,351			13,351
6.0% convertible notes due 2014	82,658			82,658			62,370
Weighted average shares outstanding — diluted	273,686			282,602			263,379
Net income attributable to Amkor per common share:
Basic	$	0.48		$	1.26		$	0.85
Diluted	0.39			0.91			0.67

Antidilutive effect of potential shares of common stock that were excluded from diluted earnings per share

The following table summarizes the potential shares of common stock that were excluded from diluted EPS, because the effect of including these potential shares was antidilutive:



	For the Year Ended December 31,
	2011	2010	2009
	(In thousands)
Stock options and restricted share awards	5,070	6,585	7,982
2.5% convertible notes due 2011	1,094	—	—
6.25% convertible notes due 2013	695	—	—
Total potentially dilutive shares	6,859	6,585	7,982