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Summary of Significant Accounting Policies (Details 1) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Noncontrolling Interest [Line Items]      
Net income attributable to Himax Technologies, Inc. stockholders $ 66,598us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic $ 61,476us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic $ 51,596us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Transfers (to) from the noncontrolling interests:      
Increase (decrease) in Himax Technologies, Inc.'s paid-in capital for sale of shares of subsidiaries 131himx_MinorityInterestIncreaseDecreaseFromStockIssuance (1,455)himx_MinorityInterestIncreaseDecreaseFromStockIssuance 501himx_MinorityInterestIncreaseDecreaseFromStockIssuance
Decrease in Himax Technologies, Inc.'s paid-in capital for purchase of shares of subsidiaries (1,144)us-gaap_MinorityInterestDecreaseFromRedemptions (1,006)us-gaap_MinorityInterestDecreaseFromRedemptions 0us-gaap_MinorityInterestDecreaseFromRedemptions
Change from net income attributable to Himax Technologies, Inc. stockholders and transfers from noncontrolling interests $ 65,585himx_ChangeFromNetIncomeAttributableToStockholdersAndTransferesFromNoncontrollingInterest $ 59,015himx_ChangeFromNetIncomeAttributableToStockholdersAndTransferesFromNoncontrollingInterest $ 52,097himx_ChangeFromNetIncomeAttributableToStockholdersAndTransferesFromNoncontrollingInterest