Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 434,631	$ 404,998
Restricted cash	2,680	17,782
Accounts receivable:
Trade, net of allowances	298,543	392,327
Other	27,197	17,970
Inventories	198,427	191,072
Other current assets	35,352	37,918
Total current assets	996,830	1,062,067
Property, plant and equipment, net	1,656,214	1,537,226
Intangibles, net	8,382	13,524
Investments	36,707	28,215
Restricted cash	4,001	1,945
Other assets	70,913	93,845
Total assets	2,773,047	2,736,822
Current liabilities:
Short-term borrowings and current portion of long-term debt	59,395	150,081
Trade accounts payable	424,504	443,333
Accrued expenses	158,287	178,794
Total current liabilities	642,186	772,208
Long-term debt	1,062,256	964,219
Long-term debt, related party	225,000	250,000
Pension and severance obligations	129,096	103,543
Other non-current liabilities	13,288	10,171
Total liabilities	2,071,826	2,100,141
Commitments and contingencies (see Note 16)
Amkor stockholders' equity:
Preferred stock, $0.001 par value, 10,000 shares authorized, designated Series A, none issued
Common stock, $0.001 par value, 500,000 shares authorized, 197,359 and 183,467 shares issued, and 168,628 and 183,420 shares outstanding, in 2011 and 2010, respectively	197	183
Additional paid-in capital	1,611,242	1,504,927
Accumulated deficit	(798,462)	(890,270)
Accumulated other comprehensive income	10,849	15,457
Treasury stock, at cost, 28,731 and 47 shares in 2011 and 2010, respectively	(130,560)	(284)
Total Amkor stockholders' equity:	693,266	630,013
Noncontrolling interests in subsidiaries	7,955	6,668
Total equity	701,221	636,681
Total liabilities and equity	$ 2,773,047	$ 2,736,822