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Financial Assets at Fair Value Through Other Comprehensive Income - Additional Information (Detail) $ in Thousands, $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2024 TWD ($) Bonds | Dec. 31, 2024 USD ($) | Dec. 31, 2023 TWD ($)
Financial assets at fair value through other comprehensive income [line items] |  |  |
Corporate bonds amount | $ 5,677,922 | $ 173,160 | $ 6,162,467
Unsecured cumulative subordinate corporate bonds [member] |  |  |
Financial assets at fair value through other comprehensive income [line items] |  |  |
Corporate bonds amount | $ 1,000 | $ 31 |
Number of bonds acquired | 1,000 |  |
Corporate bonds annual interest rate | 3.50% | 3.50% |
Effective interest rate | 3.20% | 3.20% |

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