Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 413,048	$ 434,631
Restricted cash	2,680	2,680
Accounts receivable:
Trade, net of allowances	389,699	298,543
Other	13,098	27,197
Inventories	227,439	198,427
Other current assets	45,444	35,352
Total current assets	1,091,408	996,830
Property, plant and equipment, net	1,819,969	1,656,214
Intangibles, net	4,766	8,382
Investments	38,690	36,707
Restricted cash	2,308	4,001
Other assets	68,074	70,913
Total assets	3,025,215	2,773,047
Current liabilities:
Short-term borrowings and current portion of long-term debt	0	59,395
Trade accounts payable	439,663	424,504
Accrued expenses	212,964	158,287
Total current liabilities	652,627	642,186
Long-term debt	1,320,000	1,062,256
Long-term debt, related party	225,000	225,000
Pension and severance obligations	139,379	129,096
Other non-current liabilities	21,415	13,288
Total liabilities	2,358,421	2,071,826
Commitments and contingencies (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, 197,709 and 197,359 shares issued, and 152,397 and 168,628 shares outstanding, in 2012 and 2011, respectively	198	197
Additional paid-in capital	1,614,143	1,611,242
Accumulated deficit	(756,644)	(798,462)
Accumulated other comprehensive income	11,241	10,849
Treasury stock, at cost, 45,312 and 28,731 shares in 2012 and 2011, respectively	(210,983)	(130,560)
Total Amkor stockholders’ equity	657,955	693,266
Noncontrolling interests in subsidiaries	8,839	7,955
Total equity	666,794	701,221
Total liabilities and equity	$ 3,025,215	$ 2,773,047