Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2013

Computation of basic and diluted earnings per share

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



	For the Three Months Ended March 31,
	2013			2012
	(In thousands, except per share data)
Net income attributable to Amkor	$	13,382		$	11,774
Income allocated to participating securities	(66		)	(38		)
Net income available to Amkor common stockholders	13,316			11,736
Adjustment for dilutive securities on net income:
Net income allocated to participating securities in basic calculation	66			38
Interest on 6.0% convertible notes due 2014, net of tax	4,026			4,026
Net income attributable to Amkor — diluted	$	17,408		$	15,800

Weighted average shares outstanding — basic	152,411			167,866
Effect of dilutive securities:
Stock options and restricted share awards	18			164
6.0% convertible notes due 2014	82,658			82,658
Weighted average shares outstanding — diluted	235,087			250,688
Net income attributable to Amkor per common share:
Basic	$	0.09		$	0.07
Diluted	0.07			0.06

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 Three Months Ended March 31,
	2013	2012
	(In thousands)
Stock options and restricted share awards	4,236	4,408
Total potentially dilutive shares	4,236	4,408