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Changes in liabilities from financing activities - Reconciliation of Liabilities Arising from Financing Activities (Detail) - TWD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure of reconciliation of liabilities arising from financing activities [line items] |  |  |
Beginning balance | $ 15,998,355 | $ 14,909,803 | $ 11,017,992
Changes in cash flow from financing activities | (1,166,359) | 613,558 | 3,544,027
Adjustment of right-of-use assets | 292,104 | 419,625 | 292,464
Amortization of loan fees |  |  | 10,026
Amortization of interest expense | 51,986 | 55,369 | 45,294
Ending balance | 15,176,086 | 15,998,355 | 14,909,803
Short-term bank loans [member] |  |  |
Disclosure of reconciliation of liabilities arising from financing activities [line items] |  |  |
Beginning balance |  | 0 | 731,751
Changes in cash flow from financing activities | 339,364 |  | (731,751)
Ending balance | 339,364 |  | 0
Long-term bank loans (include the current portion) [member] |  |  |
Disclosure of reconciliation of liabilities arising from financing activities [line items] |  |  |
Beginning balance | 14,911,719 | 13,967,801 | 9,413,365
Changes in cash flow from financing activities | (1,185,222) | 907,306 | 4,513,672
Amortization of loan fees |  |  | 10,026
Amortization of interest expense | 32,084 | 36,612 | 30,738
Ending balance | 13,758,581 | 14,911,719 | 13,967,801
Guarantee deposits [member] |  |  |
Disclosure of reconciliation of liabilities arising from financing activities [line items] |  |  |
Beginning balance | 21,235 | 21,600 | 21,625
Changes in cash flow from financing activities | (49) | (365) | (25)
Ending balance | 21,186 | 21,235 | 21,600
Lease liabilities [member] |  |  |
Disclosure of reconciliation of liabilities arising from financing activities [line items] |  |  |
Beginning balance | 1,065,401 | 920,402 | 851,251
Changes in cash flow from financing activities | (320,452) | (293,383) | (237,869)
Adjustment of right-of-use assets | 292,104 | 419,625 | 292,464
Amortization of interest expense | 19,902 | 18,757 | 14,556
Ending balance | $ 1,056,955 | $ 1,065,401 | $ 920,402

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- Definition The increase (decrease) in liabilities arising from financing activities resulting from financing cash flows. [Refer: Cash flows from (used in) financing activities; Liabilities arising from financing activities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 7 -IssueDate 2024-01-01 -Paragraph 44B -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_44B_a&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of liabilities for which cash flows were, or future cash flows will be, classified in the statement of cash flows as cash flows from financing activities. [Refer: Cash flows from (used in) financing activities; Liabilities] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 7 -IssueDate 2024-01-01 -Paragraph 44D -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_44D&doctype=Standard -URIDate 2024-03-27 + Details
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