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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2012
Accounting Policies [Abstract] |
Schedule of Goodwill [Table Text Block] | The following is a summary of activity in goodwill by reportable segment.
|  | Driver IC |  |  | Non-driver products |  |  | Consolidated Total |
|  | (in thousands) |
Balance, December 31, 2010 |  | $ | 26,846 |  |  |  | - |  |  |  | 26,846 |
Balance, December 31, 2011 |  | $ | 26,846 |  |  |  | - |  |  |  | 26,846 |
Balance, December 31, 2012 |  | $ | 26,846 |  |  |  | 1,292 |  |  |  | 28,138 |
Schedule of Earnings Per Share Reconciliation [Table Text Block] | Basic and diluted earnings per ordinary share have been calculated as follows:
|  | Year Ended December 31, |
|  | 2010 |  |  | 2011 |  |  | 2012 |
Net income attributable to Himax Technologies, Inc. stockholders (in thousands) |  | $ | 33,206 |  |  |  | 10,706 |  |  |  | 51,596 |
Denominator for basic earnings per ordinary share: |  |  |  |  |  |  |  |  |  |  |  |
Weighted average number of ordinary shares outstanding (in thousands) |  |  | 355,037 |  |  |  | 353,771 |  |  |  | 341,056 |
Basic earnings per ordinary share attributable to Himax Technologies, Inc. stockholders |  | $ | 0.09 |  |  |  | 0.03 |  |  |  | 0.15 |
Schedule Of Earnings Per Share Reconciliation Under Treasury Stock Method [Table Text Block] | Contingently issuable ordinary shares underlying the unvested RSUs granted to employees are included in the calculation of diluted earnings per ordinary share based on treasury stock method. In 2011, the unvested 437,029 RSUs (represents 874,058 ordinary shares) which will vest in 2012 were excluded as their effect would be anti-dilutive.
|  | Year Ended December 31, |
|  | 2010 |  |  | 2011 |  |  | 2012 |
Net income attributable to Himax Technologies, Inc. stockholders (in thousands) |  | $ | 33,206 |  |  |  | 10,706 |  |  |  | 51,596 |
Denominator for diluted earnings per ordinary share: |  |  |  |  |  |  |  |  |  |  |  |
Weighted average number of ordinary shares outstanding (in thousands) |  |  | 355,037 |  |  |  | 353,771 |  |  |  | 341,056 |
Unvested RSUs (in thousands) |  |  | 653 |  |  |  | 56 |  |  |  | 468 |
|  |  | 355,690 |  |  |  | 353,827 |  |  |  | 341,524 |
Diluted earnings per ordinary share attributable to Himax Technologies, Inc. stockholders |  | $ | 0.09 |  |  |  | 0.03 |  |  |  | 0.15 |
Schedule Of Changes In CompanyS Ownership Interests In Subsidiaries [Table Text Block] | The effects of changes in the Company’s ownership interests in its subsidiaries on Himax Technologies, Inc. equity are set forth as follows:
|  | Year Ended December 31, |
|  | 2010 |  |  | 2011 |  |  | 2012 |
Net income attributable to Himax Technologies, Inc. stockholders |  | $ | 33,206 |  |  |  | 10,706 |  |  |  | 51,596 |
Transfers (to) from the noncontrolling interests: |  |  |  |  |  |  |  |  |  |  |  |
Increase (decrease) in Himax Technologies, Inc.’s paid-in capital for sale of shares of subsidiaries |  |  | 652 |  |  |  | (382 | ) |  |  | 501 |
Change from net income attributable to Himax Technologies, Inc. stockholders and transfers from noncontrolling interests |  | $ | 33,858 |  |  |  | 10,324 |  |  |  | 52,097 |

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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 47 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13854-109267 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph e -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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