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Income Taxes (Details Textual)
In Thousands, except Per Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
USD ($)
Dec. 31, 2011
USD ($)
Dec. 31, 2010
USD ($)
Dec. 31, 2009
USD ($)
Dec. 31, 2009
TWD
Dec. 31, 2012
Himax Taiwan [Member]
USD ($)
Dec. 31, 2011
Himax Taiwan [Member]
USD ($)
Dec. 31, 2012
Except For Himax Taiwan Himax Korea Himax Technologies Co Ltd Himax Technologies Co Ltd [Member]
USD ($)
Dec. 31, 2011
Except For Himax Taiwan Himax Korea Himax Technologies Co Ltd Himax Technologies Co Ltd [Member]
USD ($)
Percentage Of Additional Corporate Income Tax Rate On Undistributed Income 10.00%                
Percentage Of Surtax Rate 10.00%                
Tax Exemption Limit Derived From Selling New Product       $ 15,972 463,823        
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate 17.00% 17.00% 17.00%            
Income Tax Exemption Per Basic and Diluted Earnings Share $ 0.01 $ 0 $ 0.01            
Undistributed Earnings of Foreign Subsidiaries 536,452                
Deferred Tax Assets, Valuation Allowance 36,341 35,241 42,906 28,428   5,800 3,336 30,541 31,905
Increase in deferred tax asset valuation allowance 6,319 6,823 12,408            
Percentage Of Income Tax Payable 50.00%                
Percentage Of Research and Development Expenditure For Current Year On Investment Tax Credit 15.00%                
Cap Percentage Of Income Tax Payable For Current Year 30.00%                
Unrecognized Tax Benefits that Would Impact Effective Tax Rate $ 791 $ 128              
Combined Tax Rate 23.85%