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Cash and Cash Equivalents - Summary of Cash and Cash Equivalents (Detail)
$ in Thousands, $ in Thousands
Dec. 31, 2024
TWD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
TWD ($)
Cash and cash equivalents [abstract]      
Cash on hand and petty cash $ 450   $ 450
Checking accounts and demand deposits 1,194,923   1,434,939
Time deposits 14,023,666   10,918,646
Cash and cash equivalents $ 15,219,039 $ 464,137 $ 12,354,035