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Significant Assets and Liabilities Denominated in Foreign Currencies (Tables)
 12 Months Ended
Dec. 31, 2018
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Summary of Significant Assets and Liabilities Denominated in Foreign Currencies

The significant financial assets and liabilities denominated in foreign currencies were as follows:

 

 

   

Foreign Currencies

(In Thousand) 

   Exchange Rate  

Carrying Amount

(In Thousand) 
             
December 31, 2017            
             
Monetary financial assets            
US$   $ 3,065,296       US$1=NT$29.76     $ 91,223,195  
US$     1,193,369       US$1=CNY6.5342       35,514,653  
JPY     5,005,435       JPY1=NT$0.2642       1,322,436  
JPY     8,113,284       JPY1=US$0.0089       2,143,530  
                         
Monetary financial liabilities                        
US$     2,902,995       US$1=NT$29.76       86,393,137  
US$     1,007,629       US$1=CNY6.5342       29,987,042  
JPY     5,415,677       JPY1=NT$0.2642       1,430,822  
JPY     8,598,832       JPY1=US$0.0089       2,271,811  

 

December 31, 2018            
             
Monetary financial assets            
US$     3,730,484       US$1=NT$30.715       114,581,814  
US$     1,299,391       US$1=CNY6.8632       39,910,801  
JPY     4,412,591       JPY1=NT$0.2782       1,227,583  
JPY     6,568,657       JPY1=US$0.0091       1,827,400  
                         
Monetary financial liabilities                        
US$     3,361,523       US$1=NT$30.715       103,249,185  
US$     1,216,654       US$1=CNY6.8632       37,369,521  
JPY     7,401,621       JPY1=NT$0.2782       2,059,131  
JPY     7,035,704       JPY1=US$0.0091       1,957,333  
Summary of Realized and Unrealized Foreign Exchange Gain (Loss)

The significant realized and unrealized foreign exchange gain (loss) were as follows:

 

    For the Year Ended December 31
    2016   2017   2018
Functional
Currencies		   Exchange Rate   Net Foreign Exchange Gain   Exchange Rate   Net Foreign Exchange Gain (Loss)   Exchange Rate   Net Foreign Exchange Loss
        NT$       NT$       NT$   US$ (Note 4)
                             
NT$           $ 1,494,044             $ 4,130,243             $ (849,234 )   $ (27,744 )
US$     US$1=NT$32.25       203,258       US$1=NT$29.76       (244,802 )     US$1=NT$30.715       (67,476 )     (2,204 )
CNY     CNY1=NT$4.649       224,393       CNY1=NT$4.5545       (337,630 )     CNY1=NT$4.4753       (120,005 )     (3,920 )
                                                         
            $ 1,921,695             $ 3,547,811             $ (1,036,715 )   $ ($33,868)