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Short-Term Debt (Details Textual) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Short-term Debt [Line Items]    
Short-term debt $ 130,000us-gaap_ShortTermBorrowings $ 105,500us-gaap_ShortTermBorrowings
Unused Credit Lines Amount 224,634himx_UnusedCreditLinesAmount  
Unused Credit Lines Amount, Expired Amount $ 6,319himx_UnusedCreditLinesAmountExpiredAmount  
Minimum [Member]    
Short-term Debt [Line Items]    
Short-term Debt, Percentage Bearing Variable Interest Rate 0.32%us-gaap_ShortTermDebtPercentageBearingVariableInterestRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
0.42%us-gaap_ShortTermDebtPercentageBearingVariableInterestRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Maximum [Member]    
Short-term Debt [Line Items]    
Short-term Debt, Percentage Bearing Variable Interest Rate 0.45%us-gaap_ShortTermDebtPercentageBearingVariableInterestRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
0.45%us-gaap_ShortTermDebtPercentageBearingVariableInterestRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember