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Segment, Product and Geographic Information (Details 5) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Significant Customer [Line Items]
Accounts receivable	$ 90,108	$ 92,530
Customer A and its affiliates [Member]
Segment Reporting Significant Customer [Line Items]
Accounts receivable	61,100	55,681
Customer B and its affiliates [Member]
Segment Reporting Significant Customer [Line Items]
Accounts receivable	$ 29,008	$ 36,849

X

- Definition

Amount of accounts receivable generated from external customers that accounts for 10 percent or more of an entity's accounts receivable.

+ References

No definition available.

+ Details

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

X

- References

No definition available.

+ Details

Name:	himx_SegmentReportingSignificantCustomerLineItems
Namespace Prefix:	himx_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=himx_CustomerAAndItsAffiliatesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=himx_CustomerBAndItsAffiliatesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: