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Document And Entity Information
 12 Months Ended
Dec. 31, 2017
shares
Document Information [Line Items]  
Document Type 20-F
Amendment Flag false
Document Period End Date Dec. 31, 2017
Document Fiscal Year Focus 2017
Document Fiscal Period Focus FY
Entity Registrant Name Himax Technologies, Inc.
Entity Central Index Key 0001342338
Current Fiscal Year End Date --12-31
Entity Well-known Seasoned Issuer Yes
Entity Voluntary Filers No
Entity Current Reporting Status Yes
Entity Filer Category Large Accelerated Filer
Trading Symbol HIMX
Entity Common Stock, Shares Outstanding 344,207,492