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v3.23.1

Segment Information - Geographic Information of Revenue (Detail) $ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2022 TWD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 TWD ($) | Dec. 31, 2020 TWD ($)
Disclosure of geographical areas [Line Items] |  |  |  |
Revenue | $ 23,517,064 | $ 765,280 | $ 27,400,035 | $ 23,011,381
ROC [member] |  |  |  |
Disclosure of geographical areas [Line Items] |  |  |  |
Revenue | 18,671,142 |  | 21,608,567 | 18,341,726
Japan [member] |  |  |  |
Disclosure of geographical areas [Line Items] |  |  |  |
Revenue | 1,989,805 |  | 1,768,460 | 1,291,026
People's Republic of China ("PRC") [member] |  |  |  |
Disclosure of geographical areas [Line Items] |  |  |  |
Revenue | 1,970,943 |  | 1,899,362 | 1,105,535
Singapore [member] |  |  |  |
Disclosure of geographical areas [Line Items] |  |  |  |
Revenue | 390,488 |  | 1,630,733 | 1,838,394
Others [member] |  |  |  |
Disclosure of geographical areas [Line Items] |  |  |  |
Revenue | $ 494,686 |  | $ 492,913 | $ 434,700

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