Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2018

Computation of basic and diluted earnings per share

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



	For the Three Months Ended June 30,				For the Six Months Ended June 30,
	2018		2017		2018		2017
	(In thousands, except per share data)
Net income attributable to Amkor common stockholders	$	32,591	$	119,013	$	42,135	$	104,227

Weighted-average number of common shares outstanding — basic	239,351		238,863		239,283		238,774
Effect of dilutive securities:
Stock options and restricted share awards	453		816		522		827
Weighted-average number of common shares outstanding — diluted	239,804		239,679		239,805		239,601
Net income attributable to Amkor per common share:
Basic	$	0.14	$	0.50	$	0.18	$	0.44
Diluted	0.14		0.50		0.18		0.44

Summary of potential shares of common stock 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 Three Months Ended June 30,		For the Six Months Ended June 30,
	2018	2017	2018	2017
	(In thousands)
Stock options and restricted share awards	3,644	3,193	3,524	3,473