Related Party Transactions	12 Months Ended
Related Party Transactions	Dec. 31, 2011
Related Party Transactions [Abstract]
Related Party Transactions Disclosure	Related Party Transactions We purchase leadframe inventory from Acqutek Semiconductor & Technology Co., Ltd. (“Acqutek”) under arms-length transactions at terms consistent with our non-related party vendors. Mr. James J. Kim, our Executive Chairman of the Board of Directors, owned approximately 16.2% of Acqutek at December 31, 2010. In July 2011, Mr. James J. Kim sold all of his shares in Acqutek and no longer holds any interest in the company. As a result, Acqutek is no longer considered a related party. During 2011, 2010 and 2009, related party inventory purchases from Acqutek were $2.8 million, $10.3 million and $11.4 million, respectively. The related party amount due to Acqutek at December 31, 2010 was $1.2 million. Mr. JooHo Kim is an employee of Amkor and a brother of Mr. James J. Kim, our Executive Chairman of the Board of Directors. We received $0.4 million in services from a company controlled by Mr. JooHo Kim in January and February 2009.

The entire disclosure for related party transactions, including the nature of the relationship(s), a description of the transactions, the amount of the transactions, the effects of any change in the method of establishing the terms of the transaction from the previous period, stated interest rate, expiration date, terms and manner of settlement per the agreement with the related party, and amounts due to or from related parties. If the entity and one or more other entities are under common ownership or management control and this control affects the operating results or financial position, disclosure includes the nature of the control relationship even if there are no transactions between the entities. Disclosure may also include the aggregate amount of current and deferred tax expense for each statement of earnings presented where the entity is a member of a group that files a consolidated tax return, the amount of any tax related balances due to or from affiliates as of the date of each statement of financial position presented, the principal provisions of the method by which the consolidated amount of current and deferred tax expense is allocated to the members of the group and the nature and effect of any changes in that method. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.

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