XML 202 R139.htm IDEA: XBRL DOCUMENT v3.21.1
Financial Instrument Risk Exposure and Risk Management - Disclosure Of Detailed Information About Financial Assets And Liabilities Denominated In Currencies Other Than The US Dollar (Detail) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Disclosure of financial liabilities [line items]    
Financial assets $ 96,379 $ 47,374
Financial liabilities 75,519 35,973
Brazilian Reals [Member]    
Disclosure of financial liabilities [line items]    
Financial assets 73,236 28,653
Financial liabilities 61,896 28,986
Mexican Pesos [Member]    
Disclosure of financial liabilities [line items]    
Financial assets 9,889  
Financial liabilities 5,952  
Canadian Dollars [Member]    
Disclosure of financial liabilities [line items]    
Financial assets 13,254 18,721
Financial liabilities $ 7,671 $ 6,987