Financial Instruments - Summary of Detailed Information about Maturity Analysis of Obligation under Leases (Detail) $ in Thousands, $ in Thousands	Dec. 31, 2023 TWD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 TWD ($)
Less than 1 year [member] \| Obligation under leases [member]
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Non-derivative financial liabilities undiscounted amounts	$ 1,227,705	$ 40,095	$ 1,112,846
1-5 years [member]
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Non-derivative financial liabilities undiscounted amounts	106,829,736	3,488,888	141,300,566
1-5 years [member] \| Obligation under leases [member]
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Non-derivative financial liabilities undiscounted amounts	2,867,502	93,648	2,685,977
5 to 10 Years [member] \| Obligation under leases [member]
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Non-derivative financial liabilities undiscounted amounts	2,157,503	70,460	1,536,779
10 to 15 Years [member] \| Obligation under leases [member]
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Non-derivative financial liabilities undiscounted amounts	891,614	29,119	939,751
15 to 20 Years [member] \| Obligation under leases [member]
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Non-derivative financial liabilities undiscounted amounts	864,881	28,245	881,803
More than 20 Years [member] \| Obligation under leases [member]
Disclosure of maturity analysis for non-derivative financial liabilities [line items]
Non-derivative financial liabilities undiscounted amounts	$ 1,591,097	$ 51,963	$ 1,788,933