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Long-term Bank Loans - Summary of Long-term Bank Loans (Detail)
$ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2022
TWD ($)
Dec. 31, 2021
TWD ($)
Dec. 31, 2022
USD ($)
Disclosure of detailed information about borrowings [Line Items]      
Bank loans $ 13,967,801 $ 9,413,365  
Less:Fee on syndicated bank loan   (10,026)  
Less: Unamortized interest on government granted bank loans (88,330) (93,740)  
Less: Current portion (fee included) (1,522,917) (46,826) $ (49,558)
Syndicated bank loans, excluding current portion 12,444,884 9,366,539 $ 404,975
Long-term bank loans [Member]      
Disclosure of detailed information about borrowings [Line Items]      
Unused credit lines of long-term bank loan $ 9,671,868 $ 8,776,868  
Gross carrying amount [member] | Minimum [Member]      
Disclosure of detailed information about borrowings [Line Items]      
Interest rate range 1.075% 0.45% 1.075%
Gross carrying amount [member] | Maximum [Member]      
Disclosure of detailed information about borrowings [Line Items]      
Interest rate range 1.625% 1.7895% 1.625%
Gross carrying amount [member] | Syndicated bank loans repayable from November 2018 to May 2023 [member]      
Disclosure of detailed information about borrowings [Line Items]      
Bank loans   $ 54,000  
Period and payment term Borrowing period is from May 30, 2018 to May 30, 2023; interest is repayable monthly; principal is repayable semi-annually from November 30, 2018    
Gross carrying amount [member] | Government granted bank loans from March 2020 To October 2032 [Member]      
Disclosure of detailed information about borrowings [Line Items]      
Bank loans $ 14,056,131 $ 9,463,131  
Period and payment term Borrowing period is from March 11, 2020 to October 15, 2032; interest is repayable monthly; principal is repayable monthly from March 15, 2023