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Business Combinations - Additional Information (Detail)
$ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2021
TWD ($)
Dec. 31, 2020
TWD ($)
Dec. 31, 2020
USD ($)
shares
Dec. 31, 2022
Nov. 01, 2021
Disclosure of subsidiaries [Line Items]          
Revenue from continuing operations $ 570,363,380 $ 497,146,285      
Profit from continuing operations $ 62,277,713 28,833,916      
USIFR [Member]          
Disclosure of subsidiaries [Line Items]          
Percentage of voting equity interests acquired         100.00%
Proceeds From Sale Of Restricted Investments   385,735      
Proceeds from Decommissioning Trust Fund Assets   294,244      
Proceed From the issue of Other investment   91,491      
Top of range [member]          
Disclosure of subsidiaries [Line Items]          
Contingent consideration recognised as of acquisition date     $ 42,805    
USIFR [Member]          
Disclosure of subsidiaries [Line Items]          
Consideration paid in cash for shares   10,800,558 368,753    
Arrangement for contingent consideration by making deposit to trust fund   $ 294,244 $ 10,122    
UGPL [Member]          
Disclosure of subsidiaries [Line Items]          
Number of shares issued | shares     25,940    
FAFG [Member]          
Disclosure of subsidiaries [Line Items]          
Percentage of Ownership (%)   100.00% 100.00%    
Percentage of voting equity interests acquired       100.00%