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, 2021 TWD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 TWD ($)	Dec. 31, 2019 TWD ($)
Disclosure of geographical areas [Line Items]
Revenue	$ 27,400,035	$ 987,745	$ 23,011,381	$ 20,337,881
ROC [member]
Disclosure of geographical areas [Line Items]
Revenue	21,608,567		18,341,726	15,875,027
Japan [member]
Disclosure of geographical areas [Line Items]
Revenue	1,768,460		1,291,026	1,905,032
Singapore [member]
Disclosure of geographical areas [Line Items]
Revenue	1,630,733		1,838,394	1,333,114
People's Republic of China ("PRC") [member]
Disclosure of geographical areas [Line Items]
Revenue	1,899,362		1,105,535	789,496
Others [member]
Disclosure of geographical areas [Line Items]
Revenue	$ 492,913		$ 434,700	$ 435,212