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Lease Arrangements - Summary of Right-of-Use Assets (Detail)
$ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2022
TWD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
TWD ($)
Dec. 31, 2020
TWD ($)
Dec. 31, 2022
USD ($)
Disclosure of quantitative information about right-of-use assets [line items]          
Carrying amounts $ 11,060,783   $ 10,680,262   $ 359,934
Additions to right-of-use assets 2,140,942 $ 69,669 3,239,770 $ 702,996  
Depreciation charge for right-of-use assets 1,468,040 47,772 1,114,950 946,880  
Land [member]          
Disclosure of quantitative information about right-of-use assets [line items]          
Carrying amounts 7,342,703   6,093,518   238,942
Depreciation charge for right-of-use assets 236,673 7,702 217,674 214,682  
Buildings and improvements [member]          
Disclosure of quantitative information about right-of-use assets [line items]          
Carrying amounts 3,411,750   3,663,682   111,023
Depreciation charge for right-of-use assets 660,276 21,486 509,746 370,458  
Machinery and equipment [member]          
Disclosure of quantitative information about right-of-use assets [line items]          
Carrying amounts 237,260   880,443   7,721
Depreciation charge for right-of-use assets 538,639 17,528 356,052 335,039  
Other equipment [member]          
Disclosure of quantitative information about right-of-use assets [line items]          
Carrying amounts 69,070   42,619   $ 2,248
Depreciation charge for right-of-use assets $ 32,452 $ 1,056 $ 31,478 $ 26,701