Business, Basis of Presentation and Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
Business	*Business* MagnaChip Semiconductor Corporation (together with its subsidiaries, the “Company”) is a Korea-based designer and manufacturer of analog and mixed-signal semiconductor products for consumer, computing, communication, industrial, automotive and Internet of Things (“IoT”) applications. The Company provides technology platforms for analog, mixed signal, power, high voltage, non-volatile memory and RF applications. The Company’s business is comprised of three key business lines: Display Solutions, Power Solutions and Semiconductor Manufacturing Services. The Company’s Display Solutions products provide flat panel display solutions to major suppliers of large and small flat panel display. The Company’s Power Solutions products include discrete and integrated circuit solutions for power management in consumer, communication and industrial applications. The Company’s Semiconductor Manufacturing Services provide specialty analog and mixed-signal foundry services mainly for fabless and Integrated Device Manufacturer (“IDM”) semiconductor companies that primarily serve the consumer, computing, communication, industrial, automotive and IoT applications.
Basis of Presentation	*Basis of Presentation* The accompanying unaudited interim consolidated financial statements of the Company have been prepared in accordance with generally accepted accounting principles in the United States of America (“US GAAP”). These interim consolidated financial statements include normal recurring adjustments and the elimination of all intercompany accounts and transactions which are, in the opinion of management, necessary to provide a fair statement of the Company’s financial condition and results of operations for the periods presented. These interim consolidated financial statements are presented in accordance with ASC 270, “Interim Reporting” (“ASC 270”) and, accordingly, do not include all of the information and note disclosures required by US GAAP for complete financial statements. The results of operations for the three months ended March 31, 2015 are not necessarily indicative of the results to be expected for a full year or for any other periods. The December 31, 2014 balance sheet data was derived from the Company’s audited financial statements, but does not include all disclosures required by US GAAP.
Recent Accounting Pronouncements	*Recent Accounting Pronouncements* In April 2015, the FASB issued Accounting Standards Update. 2015-03, “Interest—Imputation of Interest” (“ASU 2015-03”). ASU 2015-03 requires that debt issuance costs are presented in the balance sheet as a direct deduction from the carrying amount of debt liability, consistent with debt discounts or premiums. The recognition and measurement guidance for debt issuance costs would not be affected. ASU 2015-03 is effective for annual reporting periods beginning after December 15, 2015, including interim periods within that reporting period. The Company is currently evaluating the impact of the adoption of ASU 2015-03 on its consolidated financial statements. In August 2014, the FASB issued Accounting Standards Update No. 2014-15, “Presentation of Financial Statements — Going Concern” (“ASU 2014-15”), which provides guidance on determining when and how to disclose going-concern uncertainties in the financial statements. ASU 2014-15 requires management to perform interim and annual assessments of an entity’s ability to continue as a going concern within one year of the date the financial statements are issued. An entity will be required to provide certain disclosures if conditions of events raise substantial doubt about the entity’s ability to continue as a going concern. ASU 2014-15 is effective for annual periods ending after December 15, 2016, and interim periods thereafter, with early adoption permitted. The Company is currently evaluating the impact of the adoption of ASU 2014-15 on its consolidated financial statements. In May 2014, the FASB issued Accounting Standards Update No. 2014-09, “Revenue from Contracts with Customers” (“ASU 2014-09”). ASU 2014-09 supersedes the revenue recognition requirements in “Revenue Recognition (Topic 605)”, and requires entities to recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services. ASU 2014-09 is effective for annual reporting periods beginning after December 15, 2016, including interim periods within that reporting period. Early adoption is not permitted. The Company is currently evaluating the impact of the adoption of ASU 2014-09 on its consolidated financial statements.