Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net sales	$ 2,956,450	$ 2,759,546	$ 2,776,359
Cost of sales	2,411,937	2,335,736	2,285,790
Gross profit	544,513	423,810	490,569
Selling, general and administrative	247,779	217,000	246,513
Research and development	64,625	54,118	50,386
Total operating expenses	312,404	271,118	296,899
Operating income	232,109	152,692	193,670
Interest expense	96,739	83,974	74,212
Interest expense, related party	9,169	13,969	12,394
Other expense, net	(2,214)	(638)	(13,930)
Total other expense, net	(108,122)	(98,581)	(100,536)
Income before taxes and equity in earnings of unconsolidated affiliate	123,987	54,111	93,134
Income tax expense	22,646	17,001	7,124
Income before equity in earnings of unconsolidated affiliate	101,341	37,110	86,010
Equity in earnings of J-Devices	(10,316)	(5,592)	(7,085)
Net income	111,657	42,702	93,095
Net income attributable to noncontrolling interests	(2,361)	(884)	(1,287)
Net income attributable to Amkor	$ 109,296	$ 41,818	$ 91,808
Net income attributable to Amkor per common share:
Basic (in dollars per share)	$ 0.58	$ 0.26	$ 0.48
Diluted (in dollars per share)	$ 0.50	$ 0.24	$ 0.39
Shares used in computing per common share amounts:
Basic (in shares)	187,032	160,105	190,829
Diluted (in shares)	235,330	243,004	273,686