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Employee benefits (Details 6) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2017
Defined benefit Plan +0.5% [Member]
Defined Benefit Plan Calculating Benefit Obligation Discount Rate	$ (284)	$ (427)	$ (305)
Defined Benefit Plan Calculating Benefit Obligation Rate Of Compensation Increase	310	460	422
Defined benefit Plan -0.5% [Member]
Defined Benefit Plan Calculating Benefit Obligation Discount Rate	317	479	438
Defined Benefit Plan Calculating Benefit Obligation Rate Of Compensation Increase	$ (281)	$ (416)	$ (380)

X

- Definition

present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan.

+ References

No definition available.

+ Details

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

X

- Definition

Increase of compensation, used to determine benefit obligation of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan

+ References

No definition available.

+ Details

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

X

- Details

Name:	himx_SensitivityAnalysisToDefinedBenefitPlanAxis=himx_DefinedBenefitPlanPlus05Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	himx_SensitivityAnalysisToDefinedBenefitPlanAxis=himx_DefinedBenefitPlanMinus05Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: