Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2018

Computation of basic and diluted earnings per share

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



	For the Year Ended December 31,
	2018		2017		2016
	(In thousands, except per share data)
Net income available to Amkor common stockholders	$	127,092	$	263,550	$	175,530

Weighted-average shares outstanding — basic	239,329		238,937		237,416
Effect of dilutive securities:
Stock options and restricted share awards	412		714		618
Weighted-average shares outstanding — diluted	239,741		239,651		238,034
Net income attributable to Amkor per common share:
Basic	$	0.53	$	1.10	$	0.74
Diluted	0.53		1.10		0.74

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 anti-dilutive:



	For the Year Ended December 31,
	2018	2017	2016
	(In thousands)
Stock options and restricted share awards	3,662	3,445	1,135