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Income Taxes (Details)
 12 Months Ended
Dec. 31, 2014
Himax Taiwan [Member] | Investment One [Member]  
Domestic Income Tax Expenses [Line Items]  
Tax Exemption Period January 1, 2008-December 31, 2012
Himax Taiwan [Member] | Investment Two [Member]  
Domestic Income Tax Expenses [Line Items]  
Tax Exemption Period January 1, 2014-December 31, 2018
Himax Taiwan [Member] | Investment Three [Member]  
Domestic Income Tax Expenses [Line Items]  
Tax Exemption Period January 1, 2014-December 31, 2018
Himax Semiconductor [Memer] | Investment One [Member]  
Domestic Income Tax Expenses [Line Items]  
Tax Exemption Period January 1, 2009-December 31, 2013
Himax Semiconductor [Memer] | Investment Two [Member]  
Domestic Income Tax Expenses [Line Items]  
Tax Exemption Period January 1, 2014-December 31, 2018