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Investments in Marketable Securities Available-for sale (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Aggregate Cost	$ 2,362us-gaap_AvailableForSaleSecuritiesAmortizedCost
Gross Unrealized Gains	15us-gaap_AvailableForSaleSecuritiesGrossUnrealizedGains
Gross Unrealized Losses	0us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLoss
Aggregate Market Value	2,377us-gaap_AvailableForSaleSecuritiesCurrent	788us-gaap_AvailableForSaleSecuritiesCurrent
Open-ended bond fund [Member]
Schedule of Available-for-sale Securities [Line Items]
Aggregate Cost	2,212us-gaap_AvailableForSaleSecuritiesAmortizedCost / us-gaap_InvestmentTypeAxis = himx_OpenendedBondFundMember
Gross Unrealized Gains	7us-gaap_AvailableForSaleSecuritiesGrossUnrealizedGains / us-gaap_InvestmentTypeAxis = himx_OpenendedBondFundMember
Gross Unrealized Losses	0us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLoss / us-gaap_InvestmentTypeAxis = himx_OpenendedBondFundMember
Aggregate Market Value	2,219us-gaap_AvailableForSaleSecuritiesCurrent / us-gaap_InvestmentTypeAxis = himx_OpenendedBondFundMember
Time deposit with original maturities more than three months
Schedule of Available-for-sale Securities [Line Items]
Aggregate Cost	150us-gaap_AvailableForSaleSecuritiesAmortizedCost / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_DepositsMember	771us-gaap_AvailableForSaleSecuritiesAmortizedCost / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_DepositsMember
Gross Unrealized Gains	8us-gaap_AvailableForSaleSecuritiesGrossUnrealizedGains / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_DepositsMember	17us-gaap_AvailableForSaleSecuritiesGrossUnrealizedGains / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_DepositsMember
Gross Unrealized Losses	0us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLoss / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_DepositsMember	0us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLoss / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_DepositsMember
Aggregate Market Value	$ 158us-gaap_AvailableForSaleSecuritiesCurrent / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_DepositsMember	$ 788us-gaap_AvailableForSaleSecuritiesCurrent / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_DepositsMember

X

- Definition

This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.2)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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X

- Definition

Amount of investment in debt and equity securities categorized neither as trading securities nor held-to-maturity securities and intended be sold or mature one year or operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 25

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26626-111562

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- Definition

Amount of unrealized gain before deducting unrealized loss on investments in debt and equity securities classified as available-for-sale securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563

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- Definition

Amount of unrealized loss before deducting unrealized gain on investments in available-for-sale securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563

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