Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Net sales	$ 2,776,359	$ 2,939,483	$ 2,179,109
Cost of sales	2,285,790	2,275,727	1,698,713
Gross profit	490,569	663,756	480,396
Operating expenses:
Selling, general and administrative	246,513	242,424	210,626
Research and development	50,386	47,534	44,453
Total operating expenses	296,899	289,958	255,079
Operating income	193,670	373,798	225,317
Other expense (income):
Interest expense	74,212	85,595	102,396
Interest expense, related party	12,394	15,250	13,000
Interest income	(2,749)	(2,950)	(2,367)
Foreign currency loss	2,178	13,756	3,339
Loss (gain) on debt retirement, net	15,531	18,042	(15,088)
Equity in earnings of unconsolidated affiliate	(7,085)	(6,435)	(2,373)
Other income, net	(1,030)	(619)	(113)
Total other expense, net	93,451	122,639	98,794
Income before income taxes	100,219	251,159	126,523
Income tax expense (benefit)	7,124	19,012	(29,760)
Net income	93,095	232,147	156,283
Net income attributable to noncontrolling interests	(1,287)	(176)	(303)
Net income attributable to Amkor	$ 91,808	$ 231,971	$ 155,980
Net income attributable to Amkor per common share:
Basic (in dollars per share)	$ 0.48	$ 1.26	$ 0.85
Diluted (in dollars per share)	$ 0.39	$ 0.91	$ 0.67
Shares used in computing per common share amounts:
Basic (in shares)	190,829	183,312	183,067
Diluted (in shares)	273,686	282,602	263,379