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Supplemental Cash Flow Information - Partial Cash Paid for Investing Activities (Detail) $ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2024 TWD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 TWD ($) | Dec. 31, 2022 TWD ($)
Supplemental cash flow information [line items] |  |  |  |
Purchase of property, plant and equipment | $ 5,451,431 |  | $ 3,228,471 | $ 4,918,482
Add: Beginning balance of payable to equipment suppliers | 1,196,181 |  | 1,405,931 | 1,816,555
Less: Ending balance of payable to equipment suppliers | (1,506,821) |  | (1,196,181) | (1,405,931)
Less: Transfer from other non-current assets | (96,713) |  | (305,791) | (629,737)
Cash paid during the year | 5,081,154 | $ 154,961 | 3,073,881 | $ 4,699,369
Related parties [member] |  |  |  |
Supplemental cash flow information [line items] |  |  |  |
Add: Beginning balance of payable to equipment suppliers | 58,549 |  |  |
Less: Ending balance of payable to equipment suppliers | $ (21,473) |  | $ (58,549) |

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- Definition The amount of additions to property, plant and equipment other than those acquired through business combinations. [Refer: Total for all business combinations [member]; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2024-01-01 -Paragraph 73 -Subparagraph e -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_73_e_i&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The cash outflow for the purchases of property, plant and equipment, classified as investing activities. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 7 -IssueDate 2024-01-01 -Paragraph 16 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_16_a&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition Beginning balance of payable to contractors and equipment suppliers + References No definition available. + Details
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- Definition Ending balance of payable to contractors and equipment suppliers + References No definition available. + Details
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- Definition Supplemental cash flow information. + References No definition available. + Details
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- Definition Transfer from other non current assets. + References No definition available. + Details
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- Details
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