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Financial Assets at Fair Value Through Other Comprehensive Income - 2018 (Tables)
 12 Months Ended
Dec. 31, 2018
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Summary of Financial Assets at Fair Value Through Other Comprehensive Income
    December 31, 2018
    NT$   US$ (Note 4)
         
Investments in equity instruments at FVTOCI   $ 580,399     $ 18,961  
Investments in debt instruments at FVTOCI     1,016,924       33,222  
                 
    $ 1,597,323     $ 52,183  
Summary of Investments in Equity Instruments at Fair Value Through Other Comprehensive Income
a. Investments in equity instruments at FVTOCI

 

    December 31, 2018
    NT$   US$ (Note 4)
         
Unquoted ordinary shares   $ 532,047     $ 17,381  
Limited partnership     39,669       1,296  
Unquoted preferred shares     8,683       284  
                 
    $ 580,399     $ 18,961  
Summary of Investments in Debt Instruments at Fair Value Through Other Comprehensive Income
b. Investments in debt instruments at FVTOCI

 

    December 31, 2018
    NT$   US$ (Note 4)
         
Unsecured subordinate corporate bonds   $ 1,016,924     $ 33,222