2.4.1.9 Html 153 242 1 false 55 0 false 5 false false R1.htm 0001000 - Document - Document and Entity Information Document Sheet http://www.amkor.com/role/DocumentAndEntityInformationDocument Document and Entity Information Document false false R2.htm 1001000 - Statement - Consolidated Statements of Income (Unaudited) Sheet http://www.amkor.com/role/ConsolidatedStatementsOfIncomeUnaudited Consolidated Statements of Income (Unaudited) false false R3.htm 1002000 - Statement - Consolidated Statements of Comprehensive Income (Unaudited) Sheet http://www.amkor.com/role/ConsolidatedStatementsOfComprehensiveIncomeUnaudited Consolidated Statements of Comprehensive Income (Unaudited) true false R4.htm 1003000 - Statement - Consolidated Balance Sheets (Unaudited) Sheet http://www.amkor.com/role/ConsolidatedBalanceSheetsUnaudited Consolidated Balance Sheets (Unaudited) false false R5.htm 1003501 - Statement - Consolidated Balance Sheets (Unaudited) (Parenthetical) Sheet http://www.amkor.com/role/ConsolidatedBalanceSheetsUnauditedParenthetical Consolidated Balance Sheets (Unaudited) (Parenthetical) false false R6.htm 1004000 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited) Sheet http://www.amkor.com/role/CondensedConsolidatedStatementsOfCashFlowsUnaudited Condensed Consolidated Statements of Cash Flows (Unaudited) false false R7.htm 2101100 - Disclosure - Interim Financial Statements Sheet http://www.amkor.com/role/InterimFinancialStatements Interim Financial Statements false false R8.htm 2102100 - Disclosure - New Accounting Standards Sheet http://www.amkor.com/role/NewAccountingStandards New Accounting Standards false false R9.htm 2104100 - Disclosure - Sale of Subsidiary to J-Devices Sheet http://www.amkor.com/role/SaleOfSubsidiaryToJDevices Sale of Subsidiary to J-Devices false false R10.htm 2105100 - Disclosure - Share-Based Compensation Plans Sheet http://www.amkor.com/role/ShareBasedCompensationPlans Share-Based Compensation Plans false false R11.htm 2106100 - Disclosure - Other Income and Expense Sheet http://www.amkor.com/role/OtherIncomeAndExpense Other Income and Expense false false R12.htm 2107100 - Disclosure - Income Taxes Sheet http://www.amkor.com/role/IncomeTaxes Income Taxes false false R13.htm 2108100 - Disclosure - Earnings Per Share Sheet http://www.amkor.com/role/EarningsPerShare Earnings Per Share false false R14.htm 2109100 - Disclosure - Equity and Accumulated Other Comprehensive Income (Loss) Sheet http://www.amkor.com/role/EquityAndAccumulatedOtherComprehensiveIncomeLoss Equity and Accumulated Other Comprehensive Income (Loss) false false R15.htm 2110100 - Disclosure - Factoring of Accounts Receivable Sheet http://www.amkor.com/role/FactoringOfAccountsReceivable Factoring of Accounts Receivable false false R16.htm 2112100 - Disclosure - Inventories Sheet http://www.amkor.com/role/Inventories Inventories false false R17.htm 2113100 - Disclosure - Property, Plant and Equipment Sheet http://www.amkor.com/role/PropertyPlantAndEquipment Property, Plant and Equipment false false R18.htm 2114100 - Disclosure - Investments Sheet http://www.amkor.com/role/Investments Investments false false R19.htm 2115100 - Disclosure - Accrued Expenses Sheet http://www.amkor.com/role/AccruedExpenses Accrued Expenses false false R20.htm 2118100 - Disclosure - Debt Sheet http://www.amkor.com/role/Debt Debt false false R21.htm 2119100 - Disclosure - Pension and Severance Plans Sheet http://www.amkor.com/role/PensionAndSeverancePlans Pension and Severance Plans false false R22.htm 2121100 - Disclosure - Fair Value Measurements Sheet http://www.amkor.com/role/FairValueMeasurements Fair Value Measurements false false R23.htm 2122100 - Disclosure - Commitments and Contingencies Sheet http://www.amkor.com/role/CommitmentsAndContingencies Commitments and Contingencies false false R24.htm 2201201 - Disclosure - Interim Financial Statements (Policies) Sheet http://www.amkor.com/role/InterimFinancialStatementsPolicies Interim Financial Statements (Policies) false false R25.htm 2305301 - Disclosure - Share-Based Compensation Plans (Tables) Sheet http://www.amkor.com/role/ShareBasedCompensationPlansTables Share-Based Compensation Plans (Tables) false false R26.htm 2306301 - Disclosure - Other Income and Expense (Tables) Sheet http://www.amkor.com/role/OtherIncomeAndExpenseTables Other Income and Expense (Tables) false false R27.htm 2308301 - Disclosure - Earnings Per Share Earnings Per Share (Tables) Sheet http://www.amkor.com/role/EarningsPerShareEarningsPerShareTables Earnings Per Share Earnings Per Share (Tables) false false R28.htm 2309301 - Disclosure - Equity and Accumulated Other Comprehensive Income (Loss) (Tables) Sheet http://www.amkor.com/role/EquityAndAccumulatedOtherComprehensiveIncomeLossTables Equity and Accumulated Other Comprehensive Income (Loss) (Tables) false false R29.htm 2312301 - Disclosure - Inventories (Tables) Sheet http://www.amkor.com/role/InventoriesTables Inventories (Tables) false false R30.htm 2313301 - Disclosure - Property, Plant and Equipment (Tables) Sheet http://www.amkor.com/role/PropertyPlantAndEquipmentTables Property, Plant and Equipment (Tables) false false R31.htm 2314301 - Disclosure - Investments (Tables) Sheet http://www.amkor.com/role/InvestmentsTables Investments (Tables) false false R32.htm 2315301 - Disclosure - Accrued Expenses (Tables) Sheet http://www.amkor.com/role/AccruedExpensesTables Accrued Expenses (Tables) false false R33.htm 2318301 - Disclosure - Debt (Tables) Sheet http://www.amkor.com/role/DebtTables Debt (Tables) false false R34.htm 2319301 - Disclosure - Pension and Severance Plans (Tables) Sheet http://www.amkor.com/role/PensionAndSeverancePlansTables Pension and Severance Plans (Tables) false false R35.htm 2321301 - Disclosure - Fair Value Measurements (Tables) Sheet http://www.amkor.com/role/FairValueMeasurementsTables Fair Value Measurements (Tables) false false R36.htm 2404401 - Disclosure - Sale of Subsidiary to J-Devices (Details) Sheet http://www.amkor.com/role/SaleOfSubsidiaryToJDevicesDetails Sale of Subsidiary to J-Devices (Details) false false R37.htm 2405402 - Disclosure - Share-Based Compensation Plans Compensation Expense (Details) Sheet http://www.amkor.com/role/ShareBasedCompensationPlansCompensationExpenseDetails Share-Based Compensation Plans Compensation Expense (Details) false false R38.htm 2405403 - Disclosure - Share-Based Compensation Plans Stock Options (Details) Sheet http://www.amkor.com/role/ShareBasedCompensationPlansStockOptionsDetails Share-Based Compensation Plans Stock Options (Details) false false R39.htm 2405404 - Disclosure - Share-Based Compensation Plans Weighted Average Fair Value (Details) Sheet http://www.amkor.com/role/ShareBasedCompensationPlansWeightedAverageFairValueDetails Share-Based Compensation Plans Weighted Average Fair Value (Details) false false R40.htm 2405405 - Disclosure - Share-Based Compensation Plans Restricted Shares (Details) Sheet http://www.amkor.com/role/ShareBasedCompensationPlansRestrictedSharesDetails Share-Based Compensation Plans Restricted Shares (Details) false false R41.htm 2405406 - Disclosure - Share-Based Compensation Plans Textuals (Details) Sheet http://www.amkor.com/role/ShareBasedCompensationPlansTextualsDetails Share-Based Compensation Plans Textuals (Details) false false R42.htm 2406402 - Disclosure - Other Income and Expense (Details) Sheet http://www.amkor.com/role/OtherIncomeAndExpenseDetails Other Income and Expense (Details) false false R43.htm 2407401 - Disclosure - Income Taxes (Details) Sheet http://www.amkor.com/role/IncomeTaxesDetails Income Taxes (Details) false false R44.htm 2407402 - Disclosure - Income Taxes Unrecognized Tax Benefits (Details) Sheet http://www.amkor.com/role/IncomeTaxesUnrecognizedTaxBenefitsDetails Income Taxes Unrecognized Tax Benefits (Details) false false R45.htm 2408402 - Disclosure - Earnings Per Share Earnings Per Share (Details) Sheet http://www.amkor.com/role/EarningsPerShareEarningsPerShareDetails Earnings Per Share Earnings Per Share (Details) false false R46.htm 2408403 - Disclosure - Earnings Per Share Antidilutive (Details) Sheet http://www.amkor.com/role/EarningsPerShareAntidilutiveDetails Earnings Per Share Antidilutive (Details) false false R47.htm 2409402 - Disclosure - Equity and Accumulated Other Comprehensive Income (Loss) (Details) Sheet http://www.amkor.com/role/EquityAndAccumulatedOtherComprehensiveIncomeLossDetails Equity and Accumulated Other Comprehensive Income (Loss) (Details) false false R48.htm 2409403 - Disclosure - Equity and Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Details) Sheet http://www.amkor.com/role/EquityAndAccumulatedOtherComprehensiveIncomeLossAccumulatedOtherComprehensiveIncomeDetails Equity and Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Details) false false R49.htm 2410401 - Disclosure - Factoring of Accounts Receivable (Details) Sheet http://www.amkor.com/role/FactoringOfAccountsReceivableDetails Factoring of Accounts Receivable (Details) false false R50.htm 2412402 - Disclosure - Inventories (Details) Sheet http://www.amkor.com/role/InventoriesDetails Inventories (Details) false false R51.htm 2413402 - Disclosure - Property, Plant and Equipment (Details) Sheet http://www.amkor.com/role/PropertyPlantAndEquipmentDetails Property, Plant and Equipment (Details) false false R52.htm 2413403 - Disclosure - Property, Plant and Equipment (Narrative) (Details) Sheet http://www.amkor.com/role/PropertyPlantAndEquipmentNarrativeDetails Property, Plant and Equipment (Narrative) (Details) false false R53.htm 2414402 - Disclosure - Investments (Details) Sheet http://www.amkor.com/role/InvestmentsDetails Investments (Details) false false R54.htm 2414403 - Disclosure - Investments Narrative (Details) Sheet http://www.amkor.com/role/InvestmentsNarrativeDetails Investments Narrative (Details) false false R55.htm 2415402 - Disclosure - Accrued Expenses (Details) Sheet http://www.amkor.com/role/AccruedExpensesDetails Accrued Expenses (Details) false false R56.htm 2418402 - Disclosure - Debt Long Term Debt (Details) Sheet http://www.amkor.com/role/DebtLongTermDebtDetails Debt Long Term Debt (Details) false false R57.htm 2418403 - Disclosure - Debt (Details) Sheet http://www.amkor.com/role/DebtDetails Debt (Details) false false R58.htm 2419402 - Disclosure - Pension and Severance Plans (Details) Sheet http://www.amkor.com/role/PensionAndSeverancePlansDetails Pension and Severance Plans (Details) false false R59.htm 2419403 - Disclosure - Pension and Severance Plans Textuals (Details) Sheet http://www.amkor.com/role/PensionAndSeverancePlansTextualsDetails Pension and Severance Plans Textuals (Details) false false R60.htm 2421402 - Disclosure - Fair Value Measurements Fair Value Measurements (Details) Sheet http://www.amkor.com/role/FairValueMeasurementsFairValueMeasurementsDetails Fair Value Measurements Fair Value Measurements (Details) false false R61.htm 2421403 - Disclosure - Fair Value Measurements Fair Value of Debt (Details) Sheet http://www.amkor.com/role/FairValueMeasurementsFairValueOfDebtDetails Fair Value Measurements Fair Value of Debt (Details) false false R62.htm 2422401 - Disclosure - Commitments and Contingencies (Details) Sheet http://www.amkor.com/role/CommitmentsAndContingenciesDetails Commitments and Contingencies (Details) false false All Reports Book All Reports Element amkr_Accruedsettlementcostscurrent had a mix of decimals attribute values: -5 -3. Element amkr_ProceedstoBeReceivedfromDivestitureofInterestinConsolidatedSubsidiaries had a mix of decimals attribute values: -8 -5. Element us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity had a mix of decimals attribute values: -5 0. Element us-gaap_PaymentsToAcquireBusinessesAndInterestInAffiliates had a mix of decimals attribute values: -5 -3. Element us-gaap_ProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries had a mix of decimals attribute values: -8 -5. Element us-gaap_ProceedsFromLinesOfCredit had a mix of decimals attribute values: -5 -3. Element us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds had a mix of decimals attribute values: -8 -5. 'Monetary' elements on report '2413403 - Disclosure - Property, Plant and Equipment (Narrative) (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '2418403 - Disclosure - Debt (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '2419403 - Disclosure - Pension and Severance Plans Textuals (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '2422401 - Disclosure - Commitments and Contingencies (Details)' had a mix of different decimal attribute values. Process Flow-Through: 1001000 - Statement - Consolidated Statements of Income (Unaudited) Process Flow-Through: 1002000 - Statement - Consolidated Statements of Comprehensive Income (Unaudited) Process Flow-Through: 1003000 - Statement - Consolidated Balance Sheets (Unaudited) Process Flow-Through: Removing column 'Mar. 31, 2014' Process Flow-Through: Removing column 'Dec. 31, 2013' Process Flow-Through: 1003501 - Statement - Consolidated Balance Sheets (Unaudited) (Parenthetical) Process Flow-Through: 1004000 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited) amkr-20150331.xml amkr-20150331.xsd amkr-20150331_cal.xml amkr-20150331_def.xml amkr-20150331_lab.xml amkr-20150331_pre.xml true true