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Financial Risk Management and Fair Values of Financial Instruments - Maturity Profile of Non-derivative Financial Liabilities Based on Contracted Undiscounted Payments (Detail) - TWD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items]    
Short-term bank loans   $ 733,523
Long-term bank loans $ 14,643,068 9,766,486
Lease liabilities 1,118,787 1,047,811
Guarantee deposits 21,600 21,625
Total 15,783,455 11,569,445
Within 1 year [member]    
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items]    
Short-term bank loans   733,523
Long-term bank loans 1,699,165 114,953
Lease liabilities 174,460 182,186
Total 1,873,625 1,030,662
1 to 3 years [member]    
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items]    
Long-term bank loans 5,675,288 2,817,662
Lease liabilities 182,767 119,748
Total 5,858,055 2,937,410
3 to 5 years [member]    
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items]    
Long-term bank loans 5,354,335 4,568,521
Lease liabilities 57,057 54,113
Total 5,411,392 4,622,634
Over 5 years [member]    
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items]    
Long-term bank loans 1,914,280 2,265,350
Lease liabilities 704,503 691,764
Guarantee deposits 21,600 21,625
Total $ 2,640,383 $ 2,978,739