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Financial Risk Management and Fair Values of Financial Instruments - Maturity Profile of Non-derivative Financial Liabilities Based on Contracted Undiscounted Payments (Detail) - TWD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
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Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Long-term bank loans | $ 15,580,584 | $ 14,643,068
Lease liabilities | 1,257,694 | 1,118,787
Guarantee deposits | 21,235 | 21,600
Total | 16,859,513 | 15,783,455
Within 1 year [member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Long-term bank loans | 2,469,744 | 1,699,165
Lease liabilities | 267,759 | 174,460
Total | 2,737,503 | 1,873,625
1 to 3 years [member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Long-term bank loans | 7,506,844 | 5,675,288
Lease liabilities | 250,104 | 182,767
Total | 7,756,948 | 5,858,055
3 to 5 years [member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Long-term bank loans | 4,273,199 | 5,354,335
Lease liabilities | 57,856 | 57,057
Total | 4,331,055 | 5,411,392
Over 5 years [member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items] |  |
Long-term bank loans | 1,330,797 | 1,914,280
Lease liabilities | 681,975 | 704,503
Guarantee deposits | 21,235 | 21,600
Total | $ 2,034,007 | $ 2,640,383

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