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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, 2022 TWD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 TWD ($) | Dec. 31, 2020 TWD ($)
Analysis of income and expense [abstract] |  |  |  |
Interest on lease liabilities | $ 134,871 | $ 4,389 | $ 105,159 | $ 88,026
Interest on borrowings and bonds payable | 3,912,526 | 127,319 | 2,790,368 | 3,498,999
Total interest expense for financial liabilities measured at amortized cost | 4,047,397 | 131,708 | 2,895,527 | 3,587,025
Less: Amounts included in the cost of qualifying assets |  |  |  |
Inventories related to real estate business | 0 | 0 | (71,011) | (95,589)
Property, plant and equipment | (58,263) | (1,896) | (25,581) | (54,208)
Interest expense | 3,989,134 | 129,812 | 2,798,935 | 3,437,228
Other finance costs | 20,648 | 672 | 32,372 | 22,283
Finance costs | $ 4,009,782 | $ 130,484 | $ 2,831,307 | $ 3,459,511

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