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Short-term Bank Loans - Summary of Short-term Bank Loans (Detail) - Short-term borrowings [member] $ in Thousands, $ in Thousands | Dec. 31, 2021 TWD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 TWD ($) | Dec. 31, 2020 USD ($)
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Disclosure of detailed information about borrowings [Line Items] |  |  |  |
Unsecured bank loans | $ 731,751 |  |  |
Undrawn borrowing facilities | $ 2,918,249 | $ 85,025 | $ 3,251,000 | $ 90,000
Bottom of range [member] |  |  |  |
Disclosure of detailed information about borrowings [Line Items] |  |  |  |
Interest rate range | 0.6604% | 0.6604% |  |
Top of range [member] |  |  |  |
Disclosure of detailed information about borrowings [Line Items] |  |  |  |
Interest rate range | 0.7394% | 0.7394% |  |

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- Definition The interest rate on borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 7 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_7&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The amount of undrawn borrowing facilities that may be available for future operating activities and to settle capital commitments. [Refer: Capital commitments] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 7 -IssueDate 2021-01-01 -Paragraph 50 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2021-en-r&anchor=para_50_a&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The amount of loans received from banks that have not been secured by collateral. [Refer: Loans received] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_112_c&doctype=Standard -URIDate 2021-03-24 + Details
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- Details
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- Details
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- Details
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