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Vested in period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Restructuring and Related Activities [Abstract] Reduction in Force Restructuring and Related Activities Disclosure [Text Block] Fair Value Disclosures [Abstract] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value by Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value, Measurements, Recurring [Member] Fair Value, Measurements, Recurring [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 1 [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair value assets measured on recurring basis Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract] Cash equivalent money market funds Cash and Cash Equivalents, Fair Value Disclosure Restricted cash money market funds Restricted Cash Fair Value Disclosure Restricted Cash Fair Value Disclosure Accounts Receivable, Trade [Abstract] Accounts Receivable, Trade [Abstract] Accounts Receivable, Trade Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Segment Reporting [Abstract] Business Segments, Customer Concentrations and Geographic Information Segment Reporting Disclosure [Text Block] Restricted Stock [Member] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Equity 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(in dollars per share) Revenue from External Customers by Products and Services [Table Text Block] Revenue from External Customers by Products and Services [Table Text Block] Net sales by country, and property, plant and equipment by physical location Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block] Schedule of Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries by Country Schedule of Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries by Country [Table Text Block] Commitments and Contingencies Disclosure [Abstract] Unrecorded Unconditional Purchase Obligation [Table] Unrecorded Unconditional Purchase Obligation [Table] Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis] Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis] Unconditional Purchase Obligation, Category of Goods or Services Acquired [Domain] Unconditional Purchase Obligation, Category of Goods or Services Acquired [Domain] Unrecorded Unconditional Purchase Obligation [Line Items] Unrecorded Unconditional Purchase Obligation [Line Items] 2015 Operating Leases, Future Minimum Payments Due, Next Twelve Months 2016 Operating Leases, Future Minimum Payments, Due in Two Years 2017 Operating Leases, Future Minimum Payments, Due in Three Years 2018 Operating Leases, Future Minimum Payments, Due in Four Years 2019 Operating Leases, Future Minimum Payments, Due in Five Years Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Total Operating Leases, Future Minimum Payments Due Operating Leases, Rent Expense, Net Operating Leases, Rent Expense, Net Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Description of Business and Summary of Significant Accounting Policies [Abstract] Description of Business and Summary of Significant Accounting Policies [Abstract] Schedule of Significant Accounting Policies [Table] Schedule of Significant Accounting Policies [Table] Schedule of Significant Accounting Policies [Table] Equity Method Investee, Name [Axis] Investment, Name [Axis] Equity Method Investee, Name [Domain] Investment, Name [Domain] J Devices [Member] J Devices [Member] J Devices [Member] Property, Plant and Equipment by Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Land use rights [Member] Use Rights [Member] Building and Building Improvements [Member] Building and Building Improvements [Member] Machinery and Equipment [Member] Machinery and Equipment [Member] Software and Computer Equipment [Member] Software and Computer Equipment [Member] Software and Computer Equipment [Member] Furniture and Fixtures [Member] Furniture and Fixtures [Member] Summary of Significant Accounting Policies [Line Items] Summary of Significant Accounting Policies [Line Items] Summary of Significant Accounting Policies [Line Items] Useful Life, Average Property, Plant and Equipment, Useful Life Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract] Schedule of Defined Benefit Plans Disclosures [Table] Schedule of Defined Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans [Axis] Defined Benefit Plans and Other Postretirement Benefit Plans [Domain] Defined Benefit Plan and Other Postretirement Benefit Plan [Domain] Foreign Postretirement Benefit Plan [Member] Foreign Postretirement Benefit Plan [Member] Philippine Subsidiaries [Member] Philippine Subsidiaries [Member] Philippine Subsidiaries [Member] Defined Benefit Plan by Plan Asset Categories [Axis] Defined Benefit Plan, Asset Categories [Axis] Plan Asset Categories [Domain] Plan Asset Categories [Domain] Debt Securities [Member] Debt Securities [Member] Equity Securities [Member] Equity Securities [Member] Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan, Target Plan Asset Allocations Defined Benefit Plan, Target Plan Asset Allocations Amount of employer and related party securities included in plan assets Defined Benefit Plan, Amount of Employer and Related Party Securities Included in Plan Assets Defined Benefit Plan, Expected Return on Plan Assets Defined Benefit Plan, Expected Return on Plan Assets Defined Benefit Plan, Net Periodic Benefit Cost Defined Benefit Plan, Net Periodic Benefit Cost Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements Pension Expense Pension Expense Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] Projected benefit obligation at beginning of year Defined Benefit Plan, Benefit Obligation Service cost Defined Benefit Plan, Service Cost Interest cost Defined Benefit Plan, Interest Cost Benefits paid Defined Benefit Plan, Benefits Paid Actuarial losses (gains) Defined Benefit Plan, Actuarial Gain (Loss) Defined Benefit Plan, Business Combinations and Acquisitions, Benefit Obligation Defined Benefit Plan, Business Combinations and Acquisitions, Benefit Obligation Defined Benefit Plan, Divestitures, Benefit Obligation Defined Benefit Plan, Divestitures, Benefit Obligation Effects of curtailment Defined Benefit Plan, Curtailments Settlement Defined Benefit Plan, Settlements, Benefit Obligation Foreign exchange gain Defined Benefit Plan, Foreign Currency Exchange Rate Gain (Loss) Projected benefit obligation at end of year Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] Fair value of plan assets at beginning of year Defined Benefit Plan, Fair Value of Plan Assets Actual gain on plan assets Defined Benefit Plan, Actual Return on Plan Assets Employer contributions Defined Benefit Plan, Contributions by Employer Settlement Defined Benefit Plan, Settlements, Plan Assets Foreign exchange loss Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Plan Assets Fair value of plan assets at end of year Funded status of the Plans at end of year Defined Benefit Plan, Funded Status of Plan Defined Benefit Plan, Assets for Plan Benefits [Abstract] Defined Benefit Plan, Assets for Plan Benefits [Abstract] Accrued benefit liability (included in pension and severance obligations) Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent Accumulated benefit obligation Defined Benefit Plan, Accumulated Benefit Obligation Defined Benefit Plan, Plans with Benefit Obligations in Excess of Plan Assets [Abstract] Defined Benefit Plan, Plans with Benefit Obligations in Excess of Plan Assets [Abstract] Aggregate projected benefit obligation Defined Benefit Plan, Plans with Benefit Obligations in Excess of Plan Assets, Aggregate Benefit Obligation Aggregate fair value of plan assets Defined Benefit Plan, Plans with Benefit Obligations in Excess of Plan Assets, Aggregate Fair Value of Plan Assets Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract] Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract] Aggregate accumulated benefit obligation Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Accumulated Benefit Obligation Aggregate fair value of plan assets Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Fair Value of Plan Assets Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] Discount rate for determining net periodic pension cost Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate Discount rate for determining benefit obligations at year end Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate Rate of compensation increase for determining net periodic pension cost Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase Rate of compensation increase for determining benefit obligations at year end Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase Expected rate of return on plan assets for determining net periodic pension cost Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets Inventory Disclosure [Abstract] Inventories Inventory Disclosure [Text Block] Defined Benefit Plan, Estimated Future Benefit Payments [Abstract] Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract] Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year 2013 Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months 2014 Defined Benefit Plan, Expected Future Benefit Payments, Year Two 2015 Defined Benefit Plan, Expected Future Benefit Payments, Year Three 2016 Defined Benefit Plan, Expected Future Benefit Payments, Year Four 2017 Defined Benefit Plan, Expected Future Benefit Payments, Year Five 2018 to 2022 Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter Income Tax Disclosure [Abstract] Operating Loss Carryforwards [Table] Operating Loss Carryforwards [Table] Income Tax Authority [Axis] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] United States [Member] Internal Revenue Service (IRS) [Member] State Income Taxes [Member] State and Local Jurisdiction [Member] Non-U.S. [Member] Foreign Tax Authority [Member] U.S. [Member] Domestic Tax Authority [Member] KOREA, REPUBLIC OF KOREA, REPUBLIC OF Operating Loss Carryforwards [Line Items] Operating Loss Carryforwards [Line Items] Loss Carryforwards and other details [Abstract] Income Taxes Textuals [Abstract] Income Taxes Textuals [Abstract] Operating loss carryforwards Operating Loss Carryforwards Operating loss carryforwards, expiration dates Operating Loss Carryforwards, Expiration Date Tax Credit Carryforward, Amount Tax Credit Carryforward, Amount Undistributed Earnings of Foreign Subsidiaries Repatriation Of Earnings Estimated Tax Impact The estimated tax impact (foreign withholding and federal income tax) that would be generated if undistributed earnings as of the balance sheet date were to be repatriated to the domestic country. Loss Contingencies [Table] Loss Contingencies [Table] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Line of Credit [Member] Line of Credit [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] $200 million revolving credit facility, LIBOR plus 1.25%-1.75%, due December 2019 (1) Senior Secured Revolving Credit Facility due December 2019 [Member] Senior Secured Revolving Credit Facility due December 2019 [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolving Credit Facility [Member] Revolving Credit Facility [Member] Letter of Credit [Member] Letter of Credit [Member] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Cost of Sales [Member] Cost of Sales [Member] Interest Expense [Member] Interest Expense [Member] Litigation Case [Axis] Litigation Case [Axis] Litigation Case Type [Domain] Litigation Case [Domain] Tessera Inc Legal Proceedings [Member] Tessera Inc Legal Proceedings [Member] Tessera inc legal proceedings. Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event [Member] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Other Commitment Other Commitment Credit facility, borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Available letter of credit subfacility utilized Letters of Credit Outstanding, Amount Letter of credit sublimit facility remaining Line of Credit Facility, Remaining Borrowing Capacity Loss Contingency, Damages Awarded, Value Loss Contingency, Damages Awarded, Value Loss Contingency, Interest Rate Post-Judgment Loss Contingency, Interest Rate Post-Judgment Loss Contingency, Interest Rate After Date of Award Litigation Settlement, Amount Litigation Settlement, Amount Number of Quarterly Settlement Payments Number of Quarterly Settlement Payments Number of Quarterly Settlement Payments Litigation Settlement, Expense Litigation Settlement, Expense Liabilities Estimated Litigation Liability Litigation Settlement Interest Litigation Settlement Interest Statement of Cash Flows [Abstract] Statement [Table] Statement [Table] Statement, Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Statement [Line Items] Statement [Line Items] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization Amortization of deferred debt issuance costs and premiums Amortization of Financing Costs and Discounts Deferred income taxes Deferred Income Tax Expense (Benefit) Equity in earnings of unconsolidated affiliate Income (Loss) from Equity Method Investments Loss on debt retirement Gains (Losses) on Extinguishment of Debt (Gain) loss on disposal of fixed assets, net Gain (Loss) on Disposition of Property Plant Equipment Share-based compensation Share-based Compensation Gain on sale of subsidiary to J-Devices Gain (Loss) on Disposition of Business Other, net Other Noncash Income (Expense) Changes in assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Accounts receivable Increase (Decrease) in Accounts Receivable Inventories Increase (Decrease) in Inventories Other current assets Increase (Decrease) in Other Current Assets Other assets Increase (Decrease) in Other Noncurrent Assets Trade accounts payable Increase (Decrease) in Accounts Payable Accrued expenses Increase (Decrease) in Accrued Liabilities Other non-current liabilities Increase (Decrease) in Other Operating Liabilities Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Payments for property, plant and equipment Payments to Acquire Property, Plant, and Equipment Proceeds from sale of property, plant and equipment Proceeds from Sale of Other Property, Plant, and Equipment Acquisition of business, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Cash transferred on sale of subsidiary to J-Devices, net of proceeds Proceeds from Divestiture of Businesses, Net of Cash Divested Payments from J-Devices Financing lease payment from equity method investee Cash proceeds received during the period for direct financing lease to equity method investment. Investment in J-Devices Payments to Acquire Businesses and Interest in Affiliates Purchase of short-term investment Payments to Acquire Short-term Investments Proceeds from short-term investment Proceeds from Sale of Short-term Investments Other investing activities Payments for (Proceeds from) Other Investing Activities Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Borrowings under revolving credit facilities Proceeds from Lines of Credit Payments under revolving credit facilities Repayments of Lines of Credit Borrowings under short-term debt Proceeds from Short-term Debt Payments of short-term debt Repayments of Short-term Debt Proceeds from issuance of long-term debt Proceeds from Issuance of Long-term Debt Payments of long-term debt Repayments of Long-term Debt Payments for debt issuance costs Payments of Debt Issuance Costs Payments for retirement of debt Payments of Debt Exchange Costs Payments of Debt Exchange Costs Payment of deferred consideration for an acquisition Final Installment Payment for Previous Acquisition The cash outflow attributable to a prior period acquisition whereby a portion of the fixed consideration was deferred to the current period. Payments for repurchase of common stock Payments for Repurchase of Common Stock Proceeds from issuance of stock through share-based compensation plans Proceeds from Stock Options Exercised Payments of tax withholding for restricted shares Payments Related to Tax Withholding for Share-based Compensation Net cash (used in) provided by financing activities Net Cash Provided by (Used in) Financing Activities Effect of exchange rate fluctuations on cash and cash equivalents Effect of Exchange Rate on Cash and Cash Equivalents Net (decrease) increase in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents, beginning of period Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents, end of period Supplemental disclosures of cash flow information: Supplemental Cash Flow Information [Abstract] Cash paid during the period for: Cash Paid During Period For Abstract Cash Paid During Period For Interest Interest Paid Income taxes Income Taxes Paid Non-cash investing and financing activities: Noncash Investing and Financing Items [Abstract] Additions to property, plant and equipment included in capital expenditures payable Increase (Decrease) in Construction Payables Common stock issuance for conversion and exchange in 2014 and 2013, respectively, of 6.0% convertible senior subordinated notes due April 2014, $150 million related party in 2013 Debt Conversion, Converted Instrument, Amount Schedule Of Accrued Severance Obligation Schedule Of Accrued Severance Obligation [Table Text Block] Schedule Of Accrued Severance Obligation [Table Text Block] Schedule of Changes in Projected Benefit Obligations and Fair Value of Plan Assets Schedule of Changes in Projected Benefit Obligations and Fair Value of Plan Assets [Table Text Block] Schedule of Changes in Projected Benefit Obligations and Fair Value of Plan Assets [Table Text Block] Schedule of Amounts Recognized in Balance Sheet Schedule of Amounts Recognized in Balance Sheet [Table Text Block] Schedule of Amounts Recognized in Other Comprehensive Income (Loss) Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block] Schedule of Benefit Obligations in Excess of Fair Value of Plan Assets Schedule of Benefit Obligations in Excess of Fair Value of Plan Assets [Table Text Block] Components of net periodic pension cost Schedule of Net Benefit Costs [Table Text Block] Schedule of Assumptions Used Schedule of Assumptions Used [Table Text Block] Schedule of Allocation of Plan Assets Schedule of Allocation of Plan Assets [Table Text Block] Schedule of Expected Benefit Payments Schedule of Expected Benefit Payments [Table Text Block] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Axis] Prior Service Cost [Member] Prior Service Cost [Member] Actuarial Net Gain Loss [Member] Actuarial Net Gain Loss [Member] Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax [Abstract] Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax [Abstract] Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] Unrecognized pension costs, beginning of year Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax Amortization included in net periodic pension cost, net of tax Other Comprehensive (Income) Loss, Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service Cost (Credit), Net of Tax Net gain arising during period, net of tax Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), Net of Tax Unrecognized pension costs, end of year Estimated amortization of cost to be included in 2012 net periodic pension cost Defined Benefit Plan, Future Amortization of Prior Service Cost (Credit) Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax Pension and Severance Plans Pension And Severance Plans [Text Block] The entire disclosure for pension and severance defined benefit plans. Valuation of money market funds and restricted cash using quoted market prices in active markets for identical assets Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block] Financial instruments that are not recorded at fair value Schedule of Fair Value, Debt [Table Text Block] Schedule of Fair Value, Debt [Table Text Block] Earnings Per Share [Abstract] Earnings Per Share Earnings Per Share [Text Block] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Stock Options [Member] Selling, General and Administrative Expenses [Member] Selling, General and Administrative Expenses [Member] Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Share-based compensation expense Disposal Group, Not Discontinued Operation, Disposal Disclosures [Abstract] Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Schedule of Future Minimum Rental Payments for Operating Leases Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Payables and Accruals [Abstract] Summarized Accrued expenses Schedule of Accrued Liabilities [Table Text Block] Other Income and Expenses [Abstract] Other Income and Other Expense Disclosure [Text Block] Other Income and Other Expense Disclosure [Text Block] Document Information [Table] Document Information, Document [Axis] Document Information, Document [Axis] Document [Domain] Document [Domain] Document Information [Line Items] Document Information [Line Items] Document and Entity Information [Abstract] Document and Entity Information [Abstract] Document And Entity Information. Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Document Type Document Type Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Voluntary Filers Entity Current Reporting Status Entity Current Reporting Status Entity Public Float Entity Public Float Share-Based Compensation Plans Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Debt Disclosure [Abstract] Summary of Short term Borrowings And Long term Debt Schedule of Debt [Table Text Block] Schedule of Interest Rates Schedule of Long-Term Interest Rates [Table Text Block] Schedule of Long-Term Interest Rates [Table Text Block] Schedule of Maturities of Long-term Debt Schedule of Maturities of Long-term Debt [Table Text Block] Dilutive Securities Adjustments [Table] Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table] Convertible Notes Due 2014 [Member] Convertible Notes Due 2014 [Member] convertible notes due 2014. Stock Options and Restricted Share Awards [Member] Stock Options and Restricted Share Awards [Member] Stock Options and Restricted Share Awards [Member] Dilutive Securities Adjustments [Line Items] Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] Net Income (Loss) Attributable to Parent Net Income (Loss) Attributable to Parent Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Net Income (Loss) Available to Common Stockholders, Basic Net Income (Loss) Available to Common Stockholders, Basic Net Income (Loss) Available to Common Stockholders, Basic [Abstract] Net Income (Loss) Available to Common Stockholders, Basic [Abstract] Reallocation of Net Income to Participating Securities Reallocation of Net Income to Participating Securities Adjustment for dilutive securities on net income, net income reallocated to participating securities Interest on Convertible Debt, Net of Tax Interest on Convertible Debt, Net of Tax Net Income (Loss) Available to Common Stockholders, Diluted Net Income (Loss) Available to Common Stockholders, Diluted Weighted Average Number of Shares Outstanding, Basic Weighted Average Number of Shares Outstanding, Basic Incremental Weighted Average Shares Attributable to Dilutive Effect [Abstract] Incremental Weighted Average Shares Attributable to Dilutive Effect [Abstract] Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Weighted Average Number of Shares Outstanding, Diluted Weighted Average Number of Shares Outstanding, Diluted Earnings Per Share, Basic and Diluted [Abstract] Earnings Per Share, Basic and Diluted [Abstract] Earnings Per Share, Basic Earnings Per Share, Basic Earnings Per Share, Diluted Earnings Per Share, Diluted Interest rate of convertible subordinated notes Debt Instrument, Interest Rate, Stated Percentage Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Number of Shares Outstanding beginning balance Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Number of Shares Granted Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures Number of Shares Exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Number of Shares Forfeited or expired Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Number of Shares Outstanding ending balance Number of Shares Fully vested and expected to vest Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Number of Shares Exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Weighted Average Exercise Price Per Share Outstanding beginning balance (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Weighted Average Exercise Price Per Share Granted (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Weighted Average Exercise Price Per Share Exercised (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Weighted Average Exercise Price Per Share Forfeited or expired (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Weighted Average Exercise Price Per Share Outstanding ending balance (in dollars per share) Weighted Average Exercise Price Per Share Fully vested and expected to vest (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Weighted Average Exercise Price Per Share Exercisable (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Average Remaining Contractual Term Fully vested and expected to vest (years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Average Remaining Contractual Term Exercisable (years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Aggregate intrinsic value Outstanding ending balance (in dollars) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Aggregate intrinsic value Fully vested and expected to vest (in dollars) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Aggregate intrinsic value Exercisable (in dollars) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Business Combinations [Abstract] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Toshiba Electronics Malaysia [Member] Toshiba Electronics Malaysia [Member] Toshiba Electronics Malaysia [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Business Acquisition, Percentage of Voting Interests Acquired Business Acquisition, Percentage of Voting Interests Acquired Business Combination, Consideration Transferred Business Combination, Consideration Transferred Business Acquisition, Cost of Acquired Entity, Cash Paid Payments to Acquire Businesses, Gross Final Installment Payment for Previous Acquisition Cap on Future Royalty Payments Cap on Future Royalty Payments Cap on Future Royalty Payments Valuation and Qualifying Accounts [Abstract] Valuation and Qualifying Accounts Disclosure [Table] Valuation and Qualifying Accounts Disclosure [Table] Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves [Domain] Valuation Allowances and Reserves [Domain] Valuation Allowance of Deferred Tax Assets [Member] Valuation and Qualifying Accounts Disclosure [Line Items] Valuation and Qualifying Accounts Disclosure [Line Items] Movement in Valuation Allowances and Reserves [Roll Forward] Movement in Valuation Allowances and Reserves [Roll Forward] Valuation Allowances and Reserves, Balance Valuation Allowances and Reserves, Balance Valuation Allowances and Reserves, Charged to Cost and Expense Valuation Allowances and Reserves, Charged to Cost and Expense Valuation Allowances and Reserves, Write-offs Valuation Allowances and Reserves, Deductions Valuation Allowances and Reserves, Charged to Other Accounts Valuation Allowances and Reserves, Charged to Other Accounts Valuation Allowances and Reserves, Balance Income Statement [Abstract] Net sales Revenue, Net Cost of sales Cost of Goods and Services Sold Gross profit Gross Profit Selling, general and administrative Selling, General and Administrative Expense Research and development Research and Development Expense Total operating expenses Operating Expenses Operating income Operating Income (Loss) Interest expense Interest Expense Interest expense, related party Interest Expense, Related Party Other (income) expense, net Other Nonoperating Income (Expense) Total other expense, net Nonoperating Income (Expense) Income before taxes and equity in earnings of unconsolidated affiliate Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Income tax expense Income Tax Expense (Benefit) Income before equity in earnings of unconsolidated affiliate Income Before Equity In Earnings Of Unconsolidated Affiliate Net income before the entity's share of its equity method investee's earnings. Equity in earnings of J-Devices Net income Net income attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Net income attributable to Amkor Net income attributable to Amkor per common share: Basic (in dollars per share) Diluted (in dollars per share) Shares used in computing per common share amounts: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic (in shares) Diluted (in shares) Interest income Interest Income, Deposits with Financial Institutions Foreign currency (gain) loss, net Foreign Currency Transaction Gain (Loss), before Tax Gains (Losses) on Extinguishment of Debt Including Prepayment Penalties Gains (Losses) on Extinguishment of Debt Including Prepayment Penalties Gains (Losses) on Extinguishment of Debt Including Prepayment Penalties Gain on sale of subsidiary to J-Devices (Note 4) Other income, net Other Nonoperating Income (Expense), Net The net of miscellaneous income and expense items that are combined together as a component of Other Nonoperating Income (Expense). Total other (income) expense, net Payroll and benefits Employee-related Liabilities, Current Deferred revenue and customer advances Deferred Revenue and Credits, Current Accrued settlement costs Accrued settlement costs Accrued settlement costs Income taxes payable Accrued Income Taxes, Current Accrued interest Interest Payable, Current Accrued severance plan obligations (Note 15) Supplemental Unemployment Benefits, Severance Benefits Acquisition payable (Note 3) Business Acquisition, Cost of Acquired Entity, Estimate of Remaining Cash to Be Paid Business Combination, Cost of Acquired Entity, Estimate of Remaining Cash to Be Paid Other accrued expenses Other Accrued Liabilities, Current Total accrued expenses Accrued Liabilities, Current Organization, Consolidation and Presentation of Financial Statements [Abstract] Nature of Operations [Text Block] Nature of Operations [Text Block] Basis of Presentation Basis Of Presentation [Policy Text Block] Basis Of Presentation [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Consolidation of Variable Interest Entities Consolidation, Variable Interest Entity, Policy [Policy Text Block] Foreign Currency Translation Foreign Currency Transactions and Translations Policy [Policy Text Block] Concentration Risk Disclosure [Text Block] Concentration Risk Disclosure [Text Block] Risks and Uncertainties Commitments and Contingencies, Policy [Policy Text Block] Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Restricted Cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Inventories Inventory, Policy [Policy Text Block] Other Current Assets [Text Block] Other Current Assets [Text Block] Property, Plant and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Investments Equity Method Investments, Policy [Policy Text Block] Schedule of Other Assets, Noncurrent [Table Text Block] Schedule of Other Assets, Noncurrent [Table Text Block] Other Noncurrent Liabilities [Table Text Block] Other Noncurrent Liabilities [Table Text Block] Treasury Stock Treasury Stock, Policy [Policy Text Block] Treasury Stock, Policy [Policy Text Block] Fair Value Measurements Fair Value of Financial Instruments, Policy [Policy Text Block] Revenue Recognition Revenue Recognition, Policy [Policy Text Block] Shipping and Handling Fees and Costs Shipping and Handling Cost, Policy [Policy Text Block] Research and Development Costs Research and Development Expense, Policy [Policy Text Block] Income Taxes Income Tax, Policy [Policy Text Block] 2015 Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months 2016 Long-term Debt, Maturities, Repayments of Principal in Year Two 2017 Long-term Debt, Maturities, Repayments of Principal in Year Three 2018 Long-term Debt, Maturities, Repayments of Principal in Year Four 2019 Long-term Debt, Maturities, Repayments of Principal in Year Five Thereafter Long-term Debt, Maturities, Repayments of Principal after Year Five Total debt Long-term Debt Including Related Party, Gross Amount of long-term debt, including related party debt, before deduction of unamortized discount or premium. Income Tax Holiday, Termination Date Income Tax Holiday, Termination Date Income Tax Holiday, Aggregate Dollar Amount Income Tax Holiday, Aggregate Dollar Amount Income Tax Holiday, Tax Benefit, Diluted Earnings Per Share Income Tax Holiday, Tax Benefit, Diluted Earnings Per Share Income Tax Holiday, Tax Benefit, Diluted Earnings Per Share Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Products and Services [Axis] Products and Services [Axis] Products and Services [Domain] Products and Services [Domain] Advanced Products [Member] Advanced Products [Member] Advanced Products [Member] Mainstream Products [Member] Mainstream Products [Member] Mainstream Products [Member] Customer [Axis] Customer [Axis] Customer [Domain] Customer [Domain] Customer One [Member] Customer One [Member] Customer One [Member] Customer Two [Member] Customer Two [Member] Customer Two [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Sales [Member] Sales [Member] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Customer Concentration Risk [Member] Customer Concentration Risk [Member] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] CHINA CHINA IRELAND IRELAND JAPAN JAPAN MALAYSIA MALAYSIA PHILIPPINES PHILIPPINES SINGAPORE SINGAPORE TAIWAN, PROVINCE OF CHINA TAIWAN, PROVINCE OF CHINA THAILAND THAILAND Other Foreign Countries [Member] Other Foreign Countries [Member] Other Foreign Countries [Member] Total Foreign Countries [Member] Total Foreign Countries [Member] Total Foreign Countries [Member] UNITED STATES UNITED STATES Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Property, Plant and Equipment, Net Property, Plant and Equipment, Net Concentration Risk, Percentage Concentration Risk, Percentage Accounting Changes and Error Corrections [Abstract] New Accounting Standards New Accounting Pronouncements and Changes in Accounting Principles [Text Block] Schedule of Valuation and Qualifying Accounts Disclosure Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] Factoring of Accounts Receivable [Table] Factoring of Accounts Receivable [Table] Factoring of Accounts Receivable [Table] Factoring of Accounts Receivable [Axis] Factoring of Accounts Receivable [Axis] Factoring of Accounts Receivable [Axis] Factoring of Accounts Receivable [Domain] Factoring of Accounts Receivable [Domain] [Domain] for Factoring of Accounts Receivable [Axis] Total Factored [Member] Total Factored [Member] Total Accounts Receivable Factored [Member] Factoring Fees [Member] Factoring Fees [Member] Factoring Fees [Member] Factoring of Accounts Receivable [Line Items] Factoring of Accounts Receivable [Line Items] [Line Items] for Factoring of Accounts Receivable [Table] Accounts Receivable Sold without Recourse Accounts Receivable Sold without Recourse Accounts Receivable Sold without Recourse Statement of Stockholders' Equity [Abstract] Statement, Equity Components [Axis] Total Amkor Stockholders' Equity [Member] Parent [Member] Common Stock [Member] Common Stock [Member] Additional Paid-in Capital [Member] Additional Paid-in Capital [Member] Accumulated Deficit [Member] Retained Earnings [Member] Accumulated Other Comprehensive Income [Member] Accumulated Other Comprehensive Income (Loss) [Member] Treasury Stock [Member] Treasury Stock [Member] Noncontrolling Interest in Subsidiaries [Member] Noncontrolling Interest [Member] Treasury Stock, Shares Treasury Stock, Shares Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Balance at beginning of period Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Balance at beginning of period, shares Common Stock, Shares, Issued Net income Net Income (Loss) Attributable to Noncontrolling Interest Other comprehensive income Other Comprehensive Income (Loss), Net of Tax Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest Conversion of debt to common stock Stock Issued During Period, Value, Conversion of Convertible Securities Conversion of debt to common stock, shares Stock Issued During Period, Shares, Conversion of Convertible Securities Repurchase of common stock Treasury Stock, Value, Acquired, Cost Method Repurchase of common stock, number of shares Treasury Stock, Shares, Acquired Treasury stock acquired through surrender of shares for tax withholding Adjustments Related to Tax Withholding for Share-based Compensation Treasury stock acquired through surrender of shares for tax withholding, shares Shares Paid for Tax Withholding for Share Based Compensation Issuance of stock through share-based compensation plans Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures Issuance of stock through share-based compensation plans, shares Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Share-based compensation expense Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Balance at end of period, shares Balance at end of period Schedule of Restructuring and Related Costs [Table] Schedule of Restructuring and Related Costs [Table] Restructuring Cost and Reserve [Axis] Restructuring Type [Axis] Type of Restructuring [Domain] Type of Restructuring [Domain] Employee Separation Costs [Member] Employee Severance [Member] Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Restructuring Reserve [Roll Forward] Restructuring Reserve [Roll Forward] Accrual, Beginning of year Restructuring Reserve Charges Restructuring Charges Cash Payments Payments for Restructuring Non-cash Amounts Restructuring Reserve, Translation and Other Adjustment Accrual, End of year Schedule of Income before Income Tax, Domestic and Foreign Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Schedule of Components of Income Tax Expense (Benefit) Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Schedule of Effective Income Tax Rate Reconciliation Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Schedule of Deferred Tax Assets and Liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Summary of Operating Loss Carryforwards Summary of Operating Loss Carryforwards [Table Text Block] Schedule of Unrecognized Tax Benefits Rollforward Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Stock Options And Restricted Shares [Member] Stock Options And Restricted Shares [Member] Stock options and restricted shares. Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Total potentially dilutive shares Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Schedule of Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits, by Title of Individual and by Type of Deferred Compensation [Table] Schedule of Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits, by Title of Individual and by Type of Deferred Compensation [Table] Defined Benefit Plan and Other Postretirement Benefit Plans [Domain] Korean Severance Plan [Member] Korean Severance Plan [Member] Severance plan in the form of a lump-sum payment upon termination of employment (employees and directors), based on length of service, seniority and average monthly wages at the time of termination, which is not related to restructurings, pension plans or other post retirement benefit plans. Other Deferred Cash Compensation [Axis] Other Deferred Cash Compensation [Axis] Other Deferred Cash Compensation [Axis] Other Deferred Cash Compensation [Domain] Other Deferred Cash Compensation [Domain] Other Deferred Cash Compensation [Domain] Accrued Severance Plan Minimum Service Period Deferred Compensation Arrangement with Individual, Requisite Service Period Deferred Compensation Liability, Current and Noncurrent [Roll Forward] Deferred Compensation Liability, Current and Noncurrent [Roll Forward] Deferred Compensation Liability, Current and Noncurrent [Roll Forward] Balance Deferred Compensation Cash-based Arrangements, Liability, Current and Noncurrent Provision of severance benefits Provision of Severance Benefits Provision related to lump-sum payment upon termination of employment (employees and directors), based on length of service, seniority and average monthly wages at the time of termination, which is not related to restructurings, pension plans or other post retirement benefit plans. Severance benefits are estimated assuming all eligible employees were to terminate their employment at the balance sheet date. Severance payments Payments for Employee Severance Lump-sum payments related to termination of employment (employees and directors), based on length of service, seniority and average monthly wages at the time of termination, which is not related to restructurings, pension plans or other post retirement benefit plans. Severance benefits are estimated assuming all eligible employees were to terminate their employment at the balance sheet date. (Gain) loss on foreign currency Severance Benefits, Translation Adjustments Foreign currency translation adjustments related to the transactions for lump-sum payment upon termination of employment (employees and directors), based on length of service, seniority and average monthly wages at the time of termination, which is not related to restructurings, pension plans or other post retirement benefit plans. Severance benefits are estimated assuming all eligible employees were to terminate their employment at the balance sheet date. Balance Payments remaining with the National Pension Fund Payments Remaining With Local Pension Fund Payments remaining with the Korean National Pension Fund. Pension and Other Postretirement and Postemployment Benefit Plans, Liabilities Pension and Other Postretirement and Postemployment Benefit Plans, Liabilities Less current portion of accrued severance obligation (Note 13) Pension and Other Postretirement and Postemployment Benefit Plans, Liabilities, Current Non-current portion of severance obligation Pension and Other Postretirement and Postemployment Benefit Plans, Liabilities, Noncurrent Accumulated Defined Benefit Plans Adjustment [Member] Accumulated Defined Benefit Plans Adjustment [Member] Accumulated Translation Adjustment [Member] Accumulated Translation Adjustment [Member] Equity Interest in J-Devices' Other Comprehensive Income (Loss) [Member] Equity Interest in Investee Other Comprehensive Income (Loss) [Member] Equity Interest in Investee Other Comprehensive Income (Loss) [Member] Accumulated other comprehensive (loss) income Accumulated Other Comprehensive Income (Loss), Net of Tax Other comprehensive income (loss) before reclassifications Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Amounts reclassified from accumulated other comprehensive (loss) income Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Total other comprehensive (loss) income Summary Balance Sheet Information of Equity Method Investee [Table] Summary Balance Sheet Information of Equity Method Investee [Table] Summary Balance Sheet Information of Equity Method Investee [Table] Summary Balance Sheet Information of Equity Method Investee [Line Items] Summary Balance Sheet Information of Equity Method Investee [Line Items] [Line Items] for Summary Balance Sheet Information of Equity Method Investee [Table] Statement of Comprehensive Income [Abstract] Other comprehensive (loss) income, net of tax: Other Comprehensive Income (Loss), Net of Tax [Abstract] Adjustments to unrealized components of defined benefit pension plans, net of tax Foreign currency translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Equity interest in J-Devices' other comprehensive loss, net of tax Other Comprehensive Income (Loss), Portion Attributable to Equity Method Investment, Net of Tax Other Comprehensive Income (Loss), Portion Attributable to Equity Method Investment, Net of Tax Comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive income attributable to noncontrolling interests Comprehensive income attributable to Amkor Comprehensive Income (Loss), Net of Tax, Attributable to Parent Summary of reduction in force initiatives Restructuring and Related Costs [Table Text Block] Accrued Expenses Accounts Payable and Accrued Liabilities Disclosure [Text Block] Property, Plant and Equipment [Abstract] Schedule of Significant Acquisitions and Disposals [Table] Schedule of Significant Acquisitions and Disposals [Table] Significant Acquisitions and Disposals [Line Items] Significant Acquisitions and Disposals [Line Items] Depreciation Depreciation Accumulated Capitalized Interest Costs Accumulated Capitalized Interest Costs Foreign Postretirement Benefit Plan, Defined Benefit [Member] Defined Benefit Plan, Asset Categories [Axis] Equity Securities by Industry [Axis] Equity Securities by Industry [Axis] Equity Securities, Industry [Domain] Equity Securities, Industry [Domain] Equity Securities by Entity Size [Axis] Equity Securities by Entity Size [Axis] Equity Securities, Entity Size [Domain] Equity Securities, Entity Size [Domain] Equity Securities by Investment Objective [Axis] Equity Securities by Investment Objective [Axis] Equity Securities, Investment Objective [Domain] Equity Securities, Investment Objective [Domain] Service cost Interest cost Expected return on plan assets Amortization of prior service cost Recognized actuarial loss Net periodic pension cost Curtailment (gain) loss Defined Benefit Plan, Recognized Net (Gain) Loss Due to Settlements Total pension expense Description of Business and Summary of Significant Accounting Policies Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Measurement Basis [Axis] Measurement Basis [Axis] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Carrying Value [Member] Reported Value Measurement [Member] Senior Notes [Member] Senior Notes [Member] Convertible Subordinated Debt [Member] Convertible Subordinated Debt [Member] Subsidiary Term Loans [Member] Subsidiary Term Loans [Member] Subsidiary Term Loans [Member] Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value Debt Instrument, Fair Value Disclosure Property Plant and Equipment Policy Property Plant and Equipment Policy [Table Text Block] Property Plant and Equipment [Table Text Block] Inventories Inventory, Net, Combining Work in Process and Raw Materials Alternative [Abstract] Raw materials and purchased components Inventory, Raw Materials, Net of Reserves Work-in-process Inventory, Work in Process, Net of Reserves Total inventories Inventory, Net Income Taxes Income Tax Disclosure [Text Block] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Term loan, LIBOR plus 3.70%, due December 2019 Term Loan Due December 2019 [Member] Term Loan Due December 2019 [Member] Term loan, foreign currency funding-linked base rate plus 1.75%, due September 2017 (7) Term Loan Due September 2017 [Member] Term Loan Due September 2017 [Member] Term loan, LIBOR plus 3.70%, due July 2017 (6) Term Loan Due July 2017 [Member] Term Loan Due July 2017 [Member] Term loan, LIBOR plus 3.70%, due June 2016 (4) Term Loan Due June 2016 [Member] Term Loan Due June 2016 [Member] Term loan, foreign currency funding-linked base rate plus 2.30%, due March 2015 Term Loan Due March 2015 [Member] Term Loan Due March 2015 [Member] Term loan, foreign currency funding-linked base rate plus 2.00%, due March 2017 (5) Term Loan Due March 2017 [Member] Term Loan Due March 2017 [Member] $41 million revolving credit facility, foreign currency funding-linked base rate plus 2.00%, due June 2016 (3) Revolving credit facility due June 2016 [Member] Revolving credit facility due June 2016 [Member] 6.0% Convertible senior subordinated notes, due April 2014 (2) Convertible Senior Subordinated Notes Due April 2014 [Member] Convertible senior subordinated notes due April 2014. 6.375% Senior notes, due October 2022 Senior Notes Due October 2022 [Member] Senior Notes Due October 2022 [Member] 6.625% Senior notes, due June 2021, $75 million related party Senior Notes Due 2021 [Member] Senior notes due 2021. 7.375% Senior notes, due May 2018 Senior Notes Due May 2018 [Member] Senior notes. Revolving credit facility, TAIFX plus a bank-determined spread, due April 2015 (Taiwan) (8) Revolving Credit Facility Due April 2015 [Member] Revolving Credit Facility Due April 2015 [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Description of variable rate basis Debt Instrument, Description of Variable Rate Basis Debt Instrument, Basis Spread on Variable Rate Debt Instrument, Basis Spread on Variable Rate Line of Credit Facility, Current Borrowing Capacity Debt Covenant Borrowing Base Required Accounts Receivable Minimum Debt Covenant Borrowing Base Required Accounts Receivable Minimum Interest rate Face amount, related party Debt Instrument Face Amount Related Party Debt Instrument Face Amount Related Party Reconciliation between statutory rate and income tax provision Effective Income Tax Rate Reconciliation, Amount [Abstract] U.S. federal tax at 35% Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount State taxes, net of federal benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Foreign income taxed at different rates Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount Foreign exchange (loss) gain Income Tax Reconciliation Foreign Exchange Gain Loss The portion of the difference between total income tax expense or benefit as reported in the Income Statement and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations that is attributable to gains or losses on foreign exchange. Change in valuation allowance Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Adjustments related to prior years Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount Income tax credits generated Effective Income Tax Rate Reconciliation, Tax Credit, Amount Repatriation of foreign earnings and profits Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount Expiration of capital loss carryforward Income Tax Reconciliation Expiration Of Capital Loss Carryforwards The portion of the difference between total income tax expense or benefit as reported in the Income Statement and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations that is attributable to the expiration of capital loss carryforwards. Effective Income Tax Rate Reconciliation, Expiration of Net Operating Losses Effective Income Tax Rate Reconciliation, Expiration of Net Operating Losses Effective Income Tax Rate Reconciliation, Expiration of Net Operating Losses Equity in earnings of J-Devices Effective Income Tax Rate Reconciliation, Equity in Earnings (Losses) of Unconsolidated Subsidiary, Amount Debt conversion costs Effective income tax rate reconciliation, debt conversion cost Effective income tax rate reconciliation, debt conversion cost Other Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Income tax expense Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Comprehensive Income (Loss) Note [Text Block] Comprehensive Income (Loss) Note [Text Block] Statement of Financial Position [Abstract] ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Restricted cash Restricted Cash and Cash Equivalents, Current Accounts Receivable, Net of Allowances of $1,377 and $7,120 Accounts Receivable, Net, Current Inventories Other current assets Other Assets, Current Total current assets Assets, Current Property, plant and equipment, net Investments Equity Method Investments Restricted cash Restricted Cash and Cash Equivalents, Noncurrent Other assets Other Assets, Noncurrent Total assets Assets LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Short-term borrowings and current portion of long-term debt Debt, Current Trade accounts payable Accounts Payable, Current Capital expenditures payable Capital expenditures payable Amount owed for capital expenditures. Accrued expenses Total current liabilities Liabilities, Current Long-term debt Long-term Debt, Excluding Current Maturities Long-term debt, related party Due to Related Parties, Noncurrent Pension and severance obligations Other non-current liabilities Other Liabilities, Noncurrent Total liabilities Liabilities Commitments and contingencies (Note 18) Commitments and Contingencies Equity: Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Amkor stockholders' equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, $0.001 par value, 10,000 shares authorized, designated Series A, none issued Preferred Stock, Value, Issued Common stock, $0.001 par value, 500,000 shares authorized, 282,231 and 262,109 shares issued, and 236,627 and 216,702 shares outstanding, in 2014 and 2013, respectively Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Accumulated deficit Retained Earnings (Accumulated Deficit) Accumulated other comprehensive loss Treasury stock, at cost, 45,604 and 45,407 shares in 2014 and 2013, respectively Treasury Stock, Value Total Amkor stockholders’ equity Stockholders' Equity Attributable to Parent Noncontrolling interests in subsidiaries Stockholders' Equity Attributable to Noncontrolling Interest Total equity Total liabilities and equity Liabilities and Equity Long-term Debt Including Related Party, Gross Debt Instrument, Unamortized Premium Debt Instrument, Unamortized Premium Less: Short-term borrowings and current portion of long-term debt Long-term debt (including related party) Non Current Long term Debt Including Related Party Non current long-term debt including related party. Summary of all common stock option activity Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Assumptions used in valuing the weighted average fair values of the options granted Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Restricted share activity Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block] Valuation Allowance [Table] Valuation Allowance by Deferred Tax Asset [Axis] Deferred Tax Asset [Domain] Valuation Allowance Share Based Compensation [Member] The valuation allowance related to the tax benefits of tax deductions associated with employee stock options. Valuation Allowance [Line Items] Components of Deferred Tax Assets and Liabilities [Abstract] Net operating loss carryforwards Deferred Tax Assets, Operating Loss Carryforwards Income tax credits Deferred Tax Assets, Tax Credit Carryforwards Property, plant and equipment Deferred Tax Assets, Property, Plant and Equipment Accrued liabilities Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities Unrealized foreign exchange loss Deferred Tax Assets, Unrealized Currency Losses Other Deferred Tax Assets, Other Total deferred tax assets Deferred Tax Assets, Gross Valuation allowance Deferred Tax Assets, Valuation Allowance Total deferred tax assets net of valuation allowance Deferred Tax Assets, Net of Valuation Allowance Property, plant and equipment Deferred Tax Liabilities, Property, Plant and Equipment Deferred gain Deferred Tax Liabilities, Tax Deferred Income Other Deferred Tax Liabilities, Other Total deferred tax liabilities Deferred Tax Liabilities, Gross Net deferred tax assets Deferred Tax Assets, Net Other current assets Deferred Tax Assets, Net, Current Other assets Deferred Tax Assets, Net, Noncurrent Accrued expenses Deferred Tax Liabilities, Net, Current Other non-current liabilities Deferred Tax Liabilities, Net, Noncurrent Valuation Allowance, Deferred Tax Asset, Change in Amount Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount Schedule of Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Land Land [Member] Land use rights Buildings and improvements Machinery and equipment Software and computer equipment Furniture, fixtures and other equipment Construction in progress Construction in Progress [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Property, plant and equipment, gross Property, Plant and Equipment, Gross Less accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Total property, plant and equipment, net Debt Debt Disclosure [Text Block] Computation of basic and diluted earnings per share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Antidilutive effect of potential shares of common stock that were excluded from diluted earnings per share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] Related Party [Member] Long Term Debt, Due to Related Party [Member] Long term debt due to related party. Non cash investing and financing activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] London Interbank Offered Rate (LIBOR) [Member] London Interbank Offered Rate (LIBOR) [Member] Foreign Currency Funding-Linked Rate [Member] Foreign Currency Funding-Linked Rate [Member] Foreign Currency Funding-Linked Rate [Member] Term loan, LIBOR plus 3.70%, due June 2016 Term loan, foreign currency funding-linked base rate plus 2.00%, due March 2017 Term loan, LIBOR plus 3.70%, due July 2017 Term loan, foreign currency funding-linked base rate plus 1.75%, due September 2017 Debt Instrument, Interest Rate at Period End Debt Instrument, Interest Rate, Effective Percentage Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Table] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Table] Disposal Group Name [Axis] Disposal Group Name [Axis] Disposal Groups, Including Discontinued Operations, Name [Domain] Disposal Groups, Including Discontinued Operations, Name [Domain] Amkor Iwate Company Ltd [Member] Japanese Subsidiary [Member] Japanese Subsidiary Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Sale of Stock, Percentage of Ownership before Transaction Sale of Stock, Percentage of Ownership before Transaction Significant Acquisitions and Disposals, Acquisition Costs or Sale Proceeds Significant Acquisitions and Disposals, Acquisition Costs or Sale Proceeds Proceeds from Divestiture of Interest in Consolidated Subsidiaries Proceeds from Divestiture of Interest in Consolidated Subsidiaries Proceeds to Be Received from Divestiture of Interest in Consolidated Subsidiaries Proceeds to Be Received from Divestiture of Interest in Consolidated Subsidiaries Proceeds to Be Received from Divestiture of Interest in Consolidated Subsidiaries Gain (Loss) on Disposition of Business Disposal Group, Including Discontinued Operation, Foreign Currency Translation Gains (Losses) Disposal Group, Including Discontinued Operation, Foreign Currency Translation Gains (Losses) Business Combination, Bargain Purchase, Gain Recognized, Amount Business Combination, Bargain Purchase, Gain Recognized, Amount Proportionate Share Of Investee Bargain Purchase Gain Proportionate Share Of Investee Bargain Purchase Gain Of the bargain purchase gain realized by the equity method investee upon its purchase of a subsidiary from the entity, the portion of the gain that is attributable to and realized by the reporting entity. Combined Net Gain from Sale of Subsidiary Combined Net Gain from Sale of Subsidiary The combined net gain (loss) realized by the entity includes the gain on the sale of the subsidiary as well as the entity's share of the increase in equity that the equity method investee related party realized upon the purchase of the former subsidiary. Property, Plant And Equipment Property, Plant and Equipment Disclosure [Text Block] Summary Income Statement Information of Equity Method Investee [Table] Summary Income Statement Information of Equity Method Investee [Table] Summary Income Statement Information of Equity Method Investee [Table] Summary Income Statement Information of Equity Method Investee [Line Items] Summary Income Statement Information of Equity Method Investee [Line Items] [Line Items] for Summary Income Statement Information of Equity Method Investee [Table] Schedule of Other Nonoperating Income (Expense) [Table Text Block] Schedule of Other Nonoperating Income (Expense) [Table Text Block] Schedule of Investments [Table] Schedule of Investments [Table] Ownership Thresholds 2015 [Axis] Option Ownership Thresholds [Axis] Option Ownership Thresholds [Axis] Option Ownership Thresholds [Domain] Ownership Threshold 2015 [Domain] [Domain] for Option Ownership Thresholds [Axis] Japanese Subsidiary [Member] Minority Shareholder in Equity Method Investment [Axis] Minority Shareholder in Equity Method Investment [Axis] Minority Shareholders in Equity Method Investment Minority Shareholder in Equity Method Investment [Domain] Minority Shareholder in Equity Method Investment [Domain] Minority Shareholder in Equity Method Investment Former NMD Shareholders [Member] Former NMD Shareholders [Member] Former NMD Shareholders [Member] Schedule of Investments [Line Items] Schedule of Investments [Line Items] Minimum ownership threshold, put option Minimum ownership threshold, put option Minimum ownership threshold, put option Ownership Interest Equity Method Investment, Ownership Percentage Payments to Acquire Businesses and Interest in Affiliates Maximum ownership ratio of call options Maximum Ownership Ratio Of Call Options Maximum Ownership Ratio Of Call Options Retained Earnings, Undistributed Earnings from Equity Method Investees Retained Earnings, Undistributed Earnings from Equity Method Investees Summary of Property, plant and equipment Property, Plant and Equipment [Table Text Block] Business Combination Disclosure [Text Block] Business Combination Disclosure [Text Block] Debt Instruments [Abstract] Debt Instruments [Abstract] Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum Line of Credit Facility, Borrowing Capacity, Description Line of Credit Facility, Borrowing Capacity, Description Debt Instrument, Face Amount Debt Instrument, Face Amount Debt Instrument, Periodic Payment, Principal Debt Instrument, Periodic Payment, Principal Line of Credit Facility, Current Borrowing Capacity Line of Credit Facility, Current Borrowing Capacity Debt Instrument, Unused Borrowing Capacity, Amount Debt Instrument, Unused Borrowing Capacity, Amount Debt Instrument Term Debt Instrument, Term Repayments of Debt Repayments of Debt Step down provision Line of Credit Facility, Step Down Provision Line of Credit Facility, Step Down Provision Line of Credit Facility, Step Down Provision, Step Down Period Line of Credit Facility, Step Down Provision, Step Down Period Represents the time period between step downs under the step down provision for a line of credit. Debt Instrument, Convertible, Conversion Price Debt Instrument, Convertible, Conversion Price Debt Conversion, Converted Instrument, Shares Issued Debt Conversion, Converted Instrument, Shares Issued Payments of Debt Exchange Costs Common stock issuance for conversion of related party 6.25% convertible subordinated notes Debt Conversion, Original Debt, Amount Fair Value Measurements Fair Value Disclosures [Text Block] Cash and Cash Equivalents [Member] Foreign Securities [Member] Foreign Equity Securities [Member] Foreign Equity Securities [Member] US Securities [Member] US Equity Securities [Member] US Equity Securities [Member] US Fixed Income Funds [Member] Fixed Income Funds [Member] US Government Debt Securities [Member] US Government Debt Securities [Member] Bonds [Member] Foreign Treasury Notes [Member] Foreign Government Short-term Debt Securities [Member] Taiwan Retirement Fund [Member] Taiwan Retirement Fund [Member] Other [Member] Other Investment Type [Member] Other Investment Type [Member] Fair value of plan assets Cost Recognized Defined Contribution Plan, Cost Recognized Geographic sources of income (loss) before income taxes Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract] United States Income (Loss) from Continuing Operations before Income Taxes, Domestic Foreign Income (Loss) from Continuing Operations before Income Taxes, Foreign Total income before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Components of the provision (benefit) for income taxes Components of Income Tax Expense (Benefit), Continuing Operations [Abstract] Current federal tax expense Current Federal Tax Expense (Benefit) Current state tax (benefit) expense Current State and Local Tax Expense (Benefit) Current foreign tax expense Current Foreign Tax Expense (Benefit) Current income tax expense Current Income Tax Expense (Benefit) Deferred federal tax expense Deferred Federal Income Tax Expense (Benefit) Deferred state tax expense Deferred State and Local Income Tax Expense (Benefit) Deferred foreign tax expense (benefit) Deferred Foreign Income Tax Expense (Benefit) Deferred income tax expense (benefit) Effective Income Tax Rate Reconciliation, Percent Effective Income Tax Rate Reconciliation, Percent Inventories Schedule of Inventory, Current [Table Text Block] Preferred stock designated Series A, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Preferred stock designated Series A, shares authorized (in shares) Preferred Stock, Shares Authorized Preferred stock designated Series A, shares issued (in shares) Preferred Stock, Shares Issued Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized (in shares) Common Stock, Shares Authorized Common stock, shares issued (in shares) Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Treasury stock, shares Schedule of Equity Method Investments [Table] Schedule of Equity Method Investments [Table] Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Equity Method Investments Equity Method Investment, Ownership Percentage Schedule of Variable Interest Entities [Table] Schedule of Variable Interest Entities [Table] Variable Interest Entities by Classification of Entity [Axis] Variable Interest Entities [Axis] Variable Interest Entity, Classification [Domain] Variable Interest Entity, Classification [Domain] Variable Interest Entity, Primary Beneficiary [Member] Variable Interest Entity, Primary Beneficiary [Member] Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Ownership Percentage Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage Carrying Amount, Assets and Liabilities Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net Expected life (in years) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Weighted average grant date fair value per option granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Income Tax Contingency [Table] Income Tax Contingency [Table] Scenario [Axis] Scenario, Forecast [Member] Scenario, Forecast [Member] Unrecognized Tax Benefit By Type Of Change Axis [Axis] Unrecognized Tax Benefit By Type Of Change Axis [Axis] Unrecognized Tax Benefit By Type of Change [Domain] Unrecognized Tax Benefit By Type of Change [Domain] Tax Deductions [Member] Tax Deductions [Member] Tax Deductions [Member] Settlement with Taxing Authority [Member] Settlement with Taxing Authority [Member] Contested Prior Year Deductions In Foreign Jurisdictions [Member] Contested Prior Year Deductions In Foreign Jurisdictions [Member] Income Tax Contingency [Line Items] Income Tax Contingency [Line Items] Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Balance, beginning of period Unrecognized Tax Benefits Additions based on tax positions related to the current year Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Additions for tax positions of prior years Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Reductions for tax positions of prior years Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Reductions related to settlements with tax authorities Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities Reductions from lapse of statutes of limitations Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations Balance, end of period Income tax contingency [Abstract] Income tax contingency [Abstract] Unrecognized tax benefits, period increase (decrease) Unrecognized Tax Benefits, Period Increase (Decrease) Liability for uncertain tax positions Liability for Uncertain Tax Positions, Noncurrent Income Tax Examination [Table] Income Tax Examination [Table] Income Tax Examination [Line Items] Income Tax Examination [Line Items] Income Tax Examination, Year(s) under Examination Income Tax Examination, Year under Examination