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Profit Before Income Tax - Summary of Finance Costs (Detail) $ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2024 TWD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 TWD ($) | Dec. 31, 2022 TWD ($)
Analysis of income and expense [abstract] |  |  |  |
Interest on lease liabilities | $ 184,970 | $ 5,641 | $ 148,916 | $ 134,871
Interest on borrowings and bonds payable | 6,848,484 | 208,859 | 6,197,706 | 3,912,526
Total interest expense for financial liabilities measured at amortized cost | 7,033,454 | 214,500 | 6,346,622 | 4,047,397
Less: Amounts included in the cost of qualifying assets |  |  |  |
Property, plant and equipment | (285,611) | (8,710) | (107,712) | (58,263)
Interest expense | 6,747,843 | 205,790 | 6,238,910 | 3,989,134
Other finance costs | 29,189 | 890 | 33,176 | 20,648
Finance costs | $ 6,777,032 | $ 206,680 | $ 6,272,086 | $ 4,009,782

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