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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% |  |  |  |  |  |  |  |

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