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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, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disclosure of reconciliation of liabilities arising from financing activities [line items] |  |  |
Beginning balance | $ 11,017,992 | $ 8,625,730 | $ 9,735,691
Changes in cash flow from financing activities | 3,544,027 | 2,094,370 | (1,411,210)
Adjustment of right-of-use assets | 292,464 | 255,179 | 249,030
Reclassification |  |  | 20,000
Amortization Of Interest Expense | 45,294 | 35,067 | 24,638
Amortization of loan fees | 10,026 | 7,646 | 7,581
Ending balance | 14,909,803 | 11,017,992 | 8,625,730
Long-term bank loans (include the current portion) [member] |  |  |
Disclosure of reconciliation of liabilities arising from financing activities [line items] |  |  |
Beginning balance | 9,413,365 | 7,733,565 | 9,041,645
Changes in cash flow from financing activities | 4,513,672 | 1,652,332 | (1,326,857)
Amortization Of Interest Expense | 30,738 | 19,822 | 11,196
Amortization of loan fees | 10,026 | 7,646 | 7,581
Ending balance | 13,967,801 | 9,413,365 | 7,733,565
Short-term bank loans [member] |  |  |
Disclosure of reconciliation of liabilities arising from financing activities [line items] |  |  |
Beginning balance | 731,751 |  |
Changes in cash flow from financing activities | (731,751) | 731,751 |
Ending balance |  | 731,751 |
Guarantee deposits [member] |  |  |
Disclosure of reconciliation of liabilities arising from financing activities [line items] |  |  |
Beginning balance | 21,625 | 21,670 | 1,095
Changes in cash flow from financing activities | (25) | (45) | 575
Reclassification |  |  | 20,000
Ending balance | 21,600 | 21,625 | 21,670
Lease liabilities [member] |  |  |
Disclosure of reconciliation of liabilities arising from financing activities [line items] |  |  |
Beginning balance | 851,251 | 870,495 | 692,951
Changes in cash flow from financing activities | (237,869) | (289,668) | (84,928)
Adjustment of right-of-use assets | 292,464 | 255,179 | 249,030
Amortization Of Interest Expense | 14,556 | 15,245 | 13,442
Ending balance | $ 920,402 | $ 851,251 | $ 870,495

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