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Inventories Related to Real Estate Business - Summary of Inventories Related to Real Estate Business (Detail)
$ in Thousands, $ in Thousands
Dec. 31, 2022
TWD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
TWD ($)
Disclosure of detailed information about property, plant and equipment [Line Items]      
Inventories related to real estate business $ 5,488,676 $ 178,610 $ 5,412,114
Land and buildings held for sale [member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Inventories related to real estate business 678,080 22,066 667,630
Construction in progress [member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Inventories related to real estate business 3,023,070 98,375 2,956,958
Land held for construction [member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Inventories related to real estate business $ 1,787,526 $ 58,169 $ 1,787,526