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Borrowings - Summary of Bills Payable (Detail)
$ in Thousands, $ in Thousands
Dec. 31, 2022
TWD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
TWD ($)
Disclosure of detailed information about borrowings [line items]      
Long-term bills payable $ 11,997,753 $ 390,425 $ 8,498,647
Unamortized Discounts [member]      
Disclosure of detailed information about borrowings [line items]      
Long-term bills payable 2,247 73 1,353
Longterm Bills Payable [member]      
Disclosure of detailed information about borrowings [line items]      
Long-term bills payable 12,000,000 390,498 8,500,000
Ta Ching Bills Finance Corporation [member]      
Disclosure of detailed information about borrowings [line items]      
Long-term bills payable 3,000,000 97,625 2,500,000
Cathay United Bank [Member]      
Disclosure of detailed information about borrowings [line items]      
Long-term bills payable 9,000,000 292,873 0
Mega Bills Finance Corporation [Member]      
Disclosure of detailed information about borrowings [line items]      
Long-term bills payable 0 0 2,000,000
China Bills Finance Corporation [member]      
Disclosure of detailed information about borrowings [line items]      
Long-term bills payable 0 0 2,500,000
International Bills Finance Corporation [member]      
Disclosure of detailed information about borrowings [line items]      
Long-term bills payable $ 0 $ 0 $ 1,500,000