Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net sales	$ 2,884,603	$ 3,129,440	$ 2,956,450
Cost of sales	2,405,338	2,576,618	2,411,937
Gross profit	479,265	552,822	544,513
Selling, general and administrative	232,409	254,498	247,779
Research and development	82,017	76,864	64,625
Total operating expenses	314,426	331,362	312,404
Operating income	164,839	221,460	232,109
Interest expense	81,407	104,956	96,739
Interest expense, related party	4,969	4,969	9,169
Other (income) expense, net	10,928	(24,543)	2,214
Total other expense, net	97,304	85,382	108,122
Income before taxes and equity in earnings of unconsolidated affiliate	67,535	136,078	123,987
Income tax expense	28,035	33,845	22,646
Income before equity in earnings of unconsolidated affiliate	39,500	102,233	101,341
Equity in earnings of J-Devices	(20,107)	(31,654)	(10,316)
Net income	59,607	133,887	111,657
Net income attributable to noncontrolling interests	(2,795)	(3,501)	(2,361)
Net income attributable to Amkor	$ 56,812	$ 130,386	$ 109,296
Net income attributable to Amkor per common share:
Basic (in dollars per share)	$ 0.24	$ 0.56	$ 0.58
Diluted (in dollars per share)	$ 0.24	$ 0.55	$ 0.50
Shares used in computing per common share amounts:
Basic (in shares)	236,850	230,710	187,032
Diluted (in shares)	237,170	236,731	235,330