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Summary of Significant Accounting Policies (Details 2) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Basic and Diluted Earnings per Ordinary Share [Line Items]      
Net income attributable to Himax Technologies, Inc. stockholders (in thousands) $ 61,476 $ 51,596 $ 10,706
Denominator for diluted earnings per ordinary share:      
Weighted average number of ordinary shares outstanding (in thousands) 340,423 341,056 353,771
Unvested RSUs (in thousands) 3,195 468 56
Weighted Average Number of Shares Outstanding, Diluted 343,618 341,524 353,827
Diluted earnings per ordinary share attributable to Himax Technologies, Inc. stockholders (in dollars per share) $ 0.18 $ 0.15 $ 0.03