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Cash and Cash Equivalents - Summary of Cash and Cash Equivalents (Detail)
$ in Thousands, $ in Thousands
Dec. 31, 2021
TWD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
TWD ($)
Cash and cash equivalents [abstract]      
Cash on hand and petty cash $ 450   $ 470
Checking accounts and demand deposits 2,683,977   2,609,421
Time deposits 3,221,749   1,503,760
Cash and cash equivalents $ 5,906,176 $ 212,912 $ 4,113,651