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Financial Assets at Fair Value Through Profit or Loss - Additional Information (Details) - USD ($)
$ in Thousands
 1 Months Ended 12 Months Ended
Dec. 31, 2017
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Jan. 31, 2018
IFRS Statement [Line Items]          
Other current assets   $ 18,559 $ 17,731    
Gains (losses) on financial assets at fair value through profit or loss   0 0 $ 322  
Income tax liabilities   2,903 6,007    
Financial assets at fair value through profit or loss, category [member]          
IFRS Statement [Line Items]          
Proceeds from disposal or maturity of available-for-sale financial assets $ 10,000        
Other current assets         $ 22,000
Gains (losses) on financial assets at fair value through profit or loss       23,038  
Income tax liabilities 2,304     $ 2,304  
Disposal Or Maturity Of Available for sale Financial Assets $ 32,000        
Reclassification into financial assets at fair value through profit or loss   $ 3,732 $ 2,032