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Investment securities, including securities measured at fair value (Details 1) (Corporate Convertible Bond [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2011
Corporate Convertible Bond [Member]
Corporate bond-available for sale, Aggregate Cost	$ 4,365
Corporate bond-available for sale, Gross unrealized gains	596
Corporate bond-available for sale, Discount amortization	119
Corporate bond-available for sale, Aggregate market value	5,080
Conversion option, Aggregate Cost	684
Conversion option, Gross unrealized gains	0
Conversion option, Gross unrealized losses	510
Conversion option, Fair value	$ 174

X

- Definition

This item represents the gross unrealized gains for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.

+ References

No definition available.

+ Details

Name:	himx_AvailableForSaleOfSecuritiesGrossUnrealizedGain
Namespace Prefix:	himx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

This item represents the Aggregate Cost for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.

+ References

No definition available.

+ Details

Name:	himx_AvailableForSaleSecuritiesAggregateCost
Namespace Prefix:	himx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

This item represents the Aggregate Market Value for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.

+ References

No definition available.

+ Details

Name:	himx_AvailableForSaleSecuritiesAggregateMarketValue
Namespace Prefix:	himx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

This item represents the Discount Amortization for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.

+ References

No definition available.

+ Details

Name:	himx_AvailableForSaleSecuritiesDiscountAmortization
Namespace Prefix:	himx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Represents the aggregate cost of convertible debt instrument.

+ References

No definition available.

+ Details

Name:	himx_DebtInstrumentConvertibleAggregateCost
Namespace Prefix:	himx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Represents the fair value disclosure of convertible debt instrument.

+ References

No definition available.

+ Details

Name:	himx_DebtInstrumentConvertibleFairValue
Namespace Prefix:	himx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Represents the gross unrealized gain of convertible debt instrument.

+ References

No definition available.

+ Details

Name:	himx_DebtInstrumentConvertibleGrossUnrealizedGains
Namespace Prefix:	himx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Represents the gross unrealized loss of convertible debt instrument.

+ References

No definition available.

+ Details

Name:	himx_DebtInstrumentConvertibleGrossUnrealizedLosses
Namespace Prefix:	himx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant