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Summary of Significant Accounting Policies (Details 3) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Net income attributable to Himax Technologies, Inc. stockholders $ 51,596 $ 10,706 $ 33,206
Transfers (to) from the noncontrolling interests:      
Increase (decrease) in Himax Technologies, Inc.s paid-in capital for sale of shares of subsidiaries 533 1,283 804
Change from net income attributable to Himax Technologies, Inc. stockholders and transfers from noncontrolling interests $ 52,097 $ 10,324 $ 33,858