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Leasing arrangements - leasee - summary of carrying amount of right-of-use assets and the depreciation expenses (Detail) $ in Thousands, $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 TWD ($) | Dec. 31, 2023 TWD ($) | Dec. 31, 2022 TWD ($) | Dec. 31, 2024 USD ($)
Disclosure of quantitative information about right-of-use assets [line items] |  |  |  |
Carrying amount | $ 1,026,591 | $ 1,037,502 |  | $ 31,308
Depreciation expenses | 303,294 | 281,027 | $ 228,821 |
Land [member] |  |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |  |
Carrying amount | 734,958 | 615,385 |  |
Depreciation expenses | 24,248 | 21,524 | 21,904 |
Buildings [member] |  |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |  |
Carrying amount | 13,458 | 7,723 |  |
Depreciation expenses | 12,195 | 11,738 | 10,861 |
Machinery and equipment [member] |  |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |  |
Carrying amount | 260,375 | 411,809 |  |
Depreciation expenses | 261,383 | 245,304 | 194,059 |
Others [member] |  |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |  |
Carrying amount | 17,800 | 2,585 |  |
Depreciation expenses | $ 5,468 | $ 2,461 | $ 1,997 |

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- Definition The amount of depreciation of right-of-use assets. [Refer: Depreciation and amortisation expense; Right-of-use assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2024-01-01 -Paragraph 53 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_53_a&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The amount of assets that represent a lessee's right to use an underlying asset for the lease term that do not meet the definition of investment property. Underlying asset is an asset that is the subject of a lease, for which the right to use that asset has been provided by a lessor to a lessee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2024-01-01 -Paragraph 53 -Subparagraph j -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_53_j&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2024-01-01 -Paragraph 47 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_47_a&doctype=Standard -URIDate 2024-03-27 + Details
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- Details
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- Details
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- Details
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- Details
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