Earnings Per Share

12 Months Ended

Dec. 31, 2016

Basic earnings per share (“EPS”) is computed by dividing net income attributable to Amkor common stockholders by the weighted-average number of common shares outstanding during the period. The weighted-average number of common shares outstanding includes restricted shares held by retirement eligible recipients and is reduced for treasury stock.

Diluted EPS is computed on the basis of the weighted-average number of shares of common stock plus the effect of dilutive potential common shares outstanding during the period. Dilutive potential common shares include outstanding stock options, unvested restricted shares and convertible debt. The following table summarizes the computation of basic and diluted EPS:



	For the Year Ended December 31,
	2016		2015			2014
	(In thousands, except per share data)
Net income attributable to Amkor	$	164,190	$	51,098		$	129,739
Income allocated to participating securities	—		(59		)	(370		)
Net income available to Amkor common stockholders — basic	164,190		51,039			129,369
Adjustment for dilutive securities on net income:
Net income reallocated to participating securities	—		—			6
Interest on 6.0% convertible notes due 2014, net of tax	—		—			1,039
Net income attributable to Amkor — diluted	$	164,190	$	51,039		$	130,414

Weighted-average shares outstanding — basic	237,416		236,850			230,710
Effect of dilutive securities:
Stock options and restricted share awards	618		320			712
6.0% convertible notes due 2014	—		—			5,309
Weighted-average shares outstanding — diluted	238,034		237,170			236,731
Net income attributable to Amkor per common share:
Basic	$	0.69	$	0.22		$	0.56
Diluted	0.69		0.22			0.55

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 anti-dilutive:



	For the Year Ended December 31,
	2016	2015	2014
	(In thousands)
Stock options and restricted share awards	1,135	1,858	1,303