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New Standards And Interpretations - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Description Of Expected Impact Of Initial Application Of New Standards Or Interpretations [Line Items]        
Decrease in cash flows used in operating activities   $ (40,649) $ 16,424 $ (9,014)
Increase in cash flows used in financing activities   $ (19,578) $ 7,042 $ (10,413)
IFRS 16        
Description Of Expected Impact Of Initial Application Of New Standards Or Interpretations [Line Items]        
Decrease in cash flows used in operating activities $ 354      
Increase in cash flows used in financing activities $ 354