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Business Combinations - Summary of Assets Acquired and Liabilities Assumed at the Date of Acquisition (Detail) - Dec. 31, 2024 $ in Thousands, $ in Thousands | TWD ($) | USD ($)
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HIRSCHMANN [Member] |  |
Disclosure of detailed information about business combination [Line Items] |  |
Cash and cash equivalents | $ 118,419 |
Trade and other receivables | 1,336,203 |
Inventories | 1,079,301 |
Property, plant and equipment | 745,660 |
Right-of-use assets | 143,629 |
Others | 167,521 |
Trade and other payables | (745,653) |
Lease liabilities | (143,629) |
Net defined benefit liabilities | (204,975) |
Others | (200,276) |
Fair value of identifiable net assets acquired | 2,296,200 |
ASEPCAYMAN [Member] |  |
Disclosure of detailed information about business combination [Line Items] |  |
Cash and cash equivalents | 404,573 | $ 12,338
Trade and other receivables | 213,592 | 6,514
Inventories | 58,564 | 1,786
Property, plant and equipment | 919,648 | 28,046
Right-of-use assets | 0 | 0
Others | 69,707 | 2,126
Trade and other payables | (263,095) | (8,023)
Lease liabilities | 0 | 0
Net defined benefit liabilities | (158,053) | (4,820)
Others | (71,848) | (2,191)
Fair value of identifiable net assets acquired | 1,173,088 | 35,776
CHE [Member] |  |
Disclosure of detailed information about business combination [Line Items] |  |
Cash and cash equivalents | 1,381,103 | 42,120
Trade and other receivables | 87,935 | 2,682
Inventories | 112,115 | 3,419
Property, plant and equipment | 421,792 | 12,863
Right-of-use assets | 96,894 | 2,955
Others | 197,450 | 6,022
Trade and other payables | (200,453) | (6,113)
Lease liabilities | (96,894) | (2,955)
Net defined benefit liabilities | 0 | 0
Others | (54,264) | (1,655)
Fair value of identifiable net assets acquired | $ 1,945,678 | $ 59,338

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