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Supplementary Cash Flow Information - Partial Cash Paid for Investing Activities (Detail)
$ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2022
TWD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
TWD ($)
Dec. 31, 2020
TWD ($)
Statement of cash flows [abstract]        
Purchase of property, plant and equipment $ 4,918,482   $ 6,552,702 $ 4,133,615
Add: Beginning balance of payable to contractors and equipment suppliers 1,816,555   1,145,359 972,770
Less: Ending balance of payable to contractors and equipment suppliers (1,405,931)   (1,816,555) (1,145,359)
Less: Transfer from other non-current assets (629,737)      
Cash paid during the year $ 4,699,369 $ 152,925 $ 5,881,506 $ 3,961,026