Equity and Accumulated Other Comprehensive Income (Loss) (Tables)

9 Months Ended

Sep. 30, 2017

Equity [Abstract]

Changes in equity attributable to both Company and noncontrolling interests

Changes in equity consist of the following:

	Attributable to Amkor			Attributable to Non-controlling Interests			Total
	(In thousands)
Equity at December 31, 2016	$	1,383,588		$	19,816		$	1,403,404
Net income	159,936			3,009			162,945
Other comprehensive income (loss)	12,047			—			12,047
Issuance of stock through employee share-based compensation plans	2,421			—			2,421
Treasury stock acquired through surrender of shares for tax withholding	(1,427		)	—			(1,427		)
Share-based compensation	3,872			—			3,872
Subsidiary dividends paid to non-controlling interests	—			(412		)	(412		)
Equity at September 30, 2017	$	1,560,437		$	22,413		$	1,582,850

	Attributable to Amkor			Attributable to Non-controlling Interests			Total
	(In thousands)
Equity at December 31, 2015	$	1,200,286		$	17,250		$	1,217,536
Net income	63,927			2,175			66,102
Other comprehensive income (loss)	52,232			—			52,232
Issuance of stock through employee share-based compensation plans	2,600			—			2,600
Treasury stock acquired through surrender of shares for tax withholding	(446		)	—			(446		)
Share-based compensation	2,449			—			2,449
Subsidiary dividends paid to non-controlling interests	—			(413		)	(413		)
Equity at September 30, 2016	$	1,321,048		$	19,012		$	1,340,060

Changes in accumulated other comprehensive income (loss)

Changes in accumulated other comprehensive income (loss), net of tax, consist of the following:

	Defined Benefit Pension		Foreign Currency Translation		Total
	(In thousands)
Accumulated other comprehensive income (loss) at December 31, 2016	$	1,138	$	5,124	$	6,262
Other comprehensive income (loss) before reclassifications	—		11,784		11,784
Amounts reclassified from accumulated other comprehensive income (loss)	263		—		263
Other comprehensive income (loss)	263		11,784		12,047
Accumulated other comprehensive income (loss) at September 30, 2017	$	1,401	$	16,908	$	18,309

	Defined Benefit Pension			Foreign Currency Translation			Total
	(In thousands)
Accumulated other comprehensive income (loss) at December 31, 2015	$	(1,425	)	$	(659	)	$	(2,084	)
Other comprehensive income (loss) before reclassifications	—			52,161			52,161
Amounts reclassified from accumulated other comprehensive income (loss)	71			—			71
Other comprehensive income (loss)	71			52,161			52,232
Accumulated other comprehensive income (loss) at September 30, 2016	$	(1,354	)	$	51,502		$	50,148