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Short-Term Borrowings - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Short-Term Borrowings
Cash and time deposits	$ 104,000	$ 164,000
Short-term borrowings	104,000	$ 164,000
Unused Credit Lines Amount, Expired Amount	21,053
Debt Instrument Collateral Amounts	$ 193,000

X

- Definition

Amount of deposit as cash

+ References

No definition available.

+ Details

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

X

- Definition

Amount of assets pledged to secure a debt instrument.

+ References

No definition available.

+ Details

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

X

- Definition

The portion of unused credit lines amount which expire as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	himx_UnusedCreditLinesAmountExpiredAmount
Namespace Prefix:	himx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	ifrs-full_BorrowingsAbstract
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of loans received from banks that have been secured by collateral. [Refer: Loans received]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2020-01-01

+ Details

Name:	ifrs-full_SecuredBankLoansReceived
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant