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Income Taxes (Details Textual) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax [Line Items]
Percentage Of Additional Corporate Income Tax Rate On Undistributed Income	10.00%himx_PercentageOfAdditionalCorporateIncomeTaxRateOnUndistributedIncome
Percentage Of Surtax Rate	10.00%himx_PercentageOfSurtaxRate
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate	17.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	17.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	17.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Income Tax Exemption Per Basic and Diluted Earnings Share	$ 0.01himx_IncomeTaxExemptionPerBasicAndDilutedEarningsShare	$ 0.01himx_IncomeTaxExemptionPerBasicAndDilutedEarningsShare	$ 0.01himx_IncomeTaxExemptionPerBasicAndDilutedEarningsShare
Undistributed Earnings of Foreign Subsidiaries	$ 626,613us-gaap_UndistributedEarningsOfForeignSubsidiaries
Deferred Tax Assets, Valuation Allowance	40,966us-gaap_DeferredTaxAssetsValuationAllowance	38,347us-gaap_DeferredTaxAssetsValuationAllowance	44,995us-gaap_DeferredTaxAssetsValuationAllowance	44,825us-gaap_DeferredTaxAssetsValuationAllowance
Percentage Of Income Tax Payable	50.00%himx_PercentageOfIncomeTaxPayable
Percentage Of Research and Development Expenditure For Current Year On Investment Tax Credit	15.00%himx_PercentageOfResearchAndDevelopmentExpenditureForCurrentYearOnInvestmentTaxCredit
Cap Percentage Of Income Tax Payable For Current Year	30.00%himx_CapPercentageOfIncomeTaxPayableForCurrentYear
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	788us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	483us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate
Combined Tax Rate	23.85%himx_CombinedTaxRate	23.85%himx_CombinedTaxRate	23.85%himx_CombinedTaxRate
Tax Exemption From Income	2,843himx_TaxExemptionFromIncome	2,392himx_TaxExemptionFromIncome	2,921himx_TaxExemptionFromIncome
Income Tax Expense (Benefit)	21,591us-gaap_IncomeTaxExpenseBenefit	19,476us-gaap_IncomeTaxExpenseBenefit	15,748us-gaap_IncomeTaxExpenseBenefit
Investment Tax Credit	4,525us-gaap_InvestmentTaxCredit	0us-gaap_InvestmentTaxCredit	0us-gaap_InvestmentTaxCredit
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	110us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	0us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	0us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense
Himax Media Solution, Inc [Member]
Income Tax [Line Items]
Income Tax Expense (Benefit)	1,221us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = himx_HimaxMediaSolutionIncMember	143us-gaap_IncomeTaxExpenseBenefit / dei_LegalEntityAxis = himx_HimaxMediaSolutionIncMember
Except For Himax Taiwan, Himax Semiconductor, Himax Korea, Himax Japan, Himax Technologies (Suzhou) Co., Ltd., Himax Technologies (Shenzhen) Co., Ltd., and Himax Imaging Corp [Member]
Income Tax [Line Items]
Deferred Tax Assets, Valuation Allowance	$ 40,966us-gaap_DeferredTaxAssetsValuationAllowance / us-gaap_IncomeTaxAuthorityAxis = himx_ExceptForHimaxTaiwanHimaxKoreaHimaxTechnologiesCoLtdHimaxTechnologiesCoLtdMember	$ 38,347us-gaap_DeferredTaxAssetsValuationAllowance / us-gaap_IncomeTaxAuthorityAxis = himx_ExceptForHimaxTaiwanHimaxKoreaHimaxTechnologiesCoLtdHimaxTechnologiesCoLtdMember

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Cap percentage of income tax payable for current year.

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Income tax exemption per basic and diluted earnings share.

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Percentage of additional corporate income tax rate on undistributed income.

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Percentage of Income tax payable.

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Percentage of research and development expenditure for current year on investment tax credit.

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Percentage of surtax rate.

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The amount of tax exemption from Income.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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The amount deducted from an entities' taxes, reflecting a percentage of an amount invested in certain assets spread over the useful life of those assets; includes deferred investment tax credits.

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Amount of undistributed earnings of foreign subsidiaries intended to be permanently reinvested outside the country of domicile.

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Amount of expense for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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