Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Net sales	$ 746,059	$ 686,527	$ 1,433,588	$ 1,341,537
Cost of sales	607,680	597,207	1,180,256	1,147,236
Gross profit	138,379	89,320	253,332	194,301
Operating expenses:
Selling, general and administrative	65,618	53,489	125,177	110,744
Research and development	14,308	13,867	28,614	27,292
Total operating expenses	79,926	67,356	153,791	138,036
Operating income	58,453	21,964	99,541	56,265
Other expense (income):
Interest expense	23,739	22,452	45,817	41,038
Interest expense, related party	3,192	3,492	6,684	6,984
Interest income	(676)	(828)	(1,503)	(1,717)
Foreign currency loss, net	2,041	1,277	875	2,067
Loss on debt retirement, net	11,619	0	11,619	0
Equity in earnings of unconsolidated affiliate	(1,445)	(892)	(1,500)	(2,880)
Other income, net	(108)	(518)	(337)	(1,152)
Total other expense, net	38,362	24,983	61,655	44,340
Income (loss) before income taxes	20,091	(3,019)	37,886	11,925
Income tax benefit	(10,238)	(3,891)	(6,209)	(529)
Net income	30,329	872	44,095	12,454
Net income attributable to noncontrolling interests	(602)	(291)	(986)	(99)
Net income attributable to Amkor	$ 29,727	$ 581	$ 43,109	$ 12,355
Net income attributable to Amkor per common share:
Basic (in dollars per share)	$ 0.18	$ 0.00	$ 0.27	$ 0.07
Diluted (in dollars per share)	$ 0.14	$ 0.00	$ 0.21	$ 0.07
Shares used in computing per common share amounts:
Basic (in shares)	160,886	165,956	156,672	166,911
Diluted (in shares)	235,111	166,009	235,099	167,012