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Income Taxes (Details 9) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Tax Credit Carryforward [Line Items]    
Tax effect 4,665himx_DeferredTaxAssetsUnusedInvestmentTaxCredits $ 6,017himx_DeferredTaxAssetsUnusedInvestmentTaxCredits
Taiwan operations [Member]    
Tax Credit Carryforward [Line Items]    
Tax effect 3,337himx_DeferredTaxAssetsUnusedInvestmentTaxCredits
/ us-gaap_IncomeTaxAuthorityAxis
= himx_TaiwanOperationsMember		  
Taiwan operations [Member] | Minimum [Member]    
Tax Credit Carryforward [Line Items]    
Expiration year 2015  
Taiwan operations [Member] | Maximum [Member]    
Tax Credit Carryforward [Line Items]    
Expiration year 2016  
US operations [Member]    
Tax Credit Carryforward [Line Items]    
Tax effect 1,328himx_DeferredTaxAssetsUnusedInvestmentTaxCredits
/ us-gaap_IncomeTaxAuthorityAxis
= himx_UsOperationsMember		  
US operations [Member] | Minimum [Member]    
Tax Credit Carryforward [Line Items]    
Expiration year 2020  
US operations [Member] | Maximum [Member]    
Tax Credit Carryforward [Line Items]    
Expiration year 2034