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Business Combinations - Summary of Impact of Acquisitions by Comprehensive Income (Detail) $ in Thousands, $ in Thousands | 2 Months Ended | 5 Months Ended
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Dec. 31, 2023 TWD ($) | Dec. 31, 2024 TWD ($) | Dec. 31, 2024 USD ($)
HIRSCHMANN [member] |  |  |
Disclosure of detailed information about business combination [Line Items] |  |  |
Operating revenue | $ 1,017,423 |  |
Net Profit (loss) | $ 46,075 |  |
ASEPCAYMAN [Member] |  |  |
Disclosure of detailed information about business combination [Line Items] |  |  |
Operating revenue |  | $ 518,026 | $ 15,798
Net Profit (loss) |  | (69,186) | (2,110)
CHE [Member] |  |  |
Disclosure of detailed information about business combination [Line Items] |  |  |
Operating revenue |  | 825,216 | 25,167
Net Profit (loss) |  | $ 152,594 | $ 4,654

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