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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