The income arising in the course of an entity's ordinary activities. Income is increases in assets, or decreases in liabilities, that result in increases in equity, other than those relating to contributions from holders of equity claims.

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+ Details

Segment Information - Geographic Information of Revenue (Detail) $ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023 TWD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 TWD ($)	Dec. 31, 2021 TWD ($)
Disclosure of geographical areas [Line Items]
Revenue	$ 21,356,228	$ 697,460	$ 23,517,064	$ 27,400,035
ROC [member]
Disclosure of geographical areas [Line Items]
Revenue	17,287,574		18,671,142	21,608,567
Japan [member]
Disclosure of geographical areas [Line Items]
Revenue	1,176,163		1,989,805	1,768,460
People's Republic of China ("PRC") [member]
Disclosure of geographical areas [Line Items]
Revenue	1,729,908		1,970,943	1,899,362
Singapore [member]
Disclosure of geographical areas [Line Items]
Revenue	676,088		390,488	1,630,733
Others [member]
Disclosure of geographical areas [Line Items]
Revenue	$ 486,495		$ 494,686	$ 492,913