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Lease Arrangements - Summary of Lease Liabilities (Detail)
$ in Thousands, $ in Thousands
Dec. 31, 2021
TWD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
TWD ($)
Lease liabilities [abstract]      
Current $ 809,536 $ 29,183 $ 774,444
Non-current $ 6,590,348 $ 237,576 $ 5,101,386