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Supplemental Cash Flow Information - Partial Cash Paid for Investing Activities (Detail)
$ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2023
TWD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
TWD ($)
Dec. 31, 2021
TWD ($)
Supplemental cash flow information [line items]        
Purchase of property, plant and equipment $ 3,228,471   $ 4,918,482 $ 6,552,702
Add: Beginning balance of payable to equipment suppliers 1,405,931   1,816,555 1,145,359
Less: Ending balance of payable to equipment suppliers (1,196,181)   (1,405,931) (1,816,555)
Less: Transfer from other non-current assets (305,791)   (629,737)  
Cash paid during the year 3,073,881 $ 100,389 $ 4,699,369 $ 5,881,506
Related parties [member]        
Supplemental cash flow information [line items]        
Less: Ending balance of payable to equipment suppliers $ (58,549)