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Significant Accounting Policies - Summary of Average Exchange Rate (Detail)
 9 Months Ended
Sep. 30, 2019
$ / $
ExchangeRate
Sep. 30, 2018
ExchangeRate
Dec. 31, 2018
ExchangeRate
Disclosure of foreign exchange rates [line items]      
Exchange Rate | $ / $ 19.7420    
Mexico, Pesos [member]      
Disclosure of foreign exchange rates [line items]      
Average Exchange Rate 1.00 1.00  
Exchange Rate 1.00   1.00
Guatemala, Quetzales      
Disclosure of foreign exchange rates [line items]      
Average Exchange Rate 2.50 2.55  
Exchange Rate 2.54   2.54
Costa Rica, Colones      
Disclosure of foreign exchange rates [line items]      
Average Exchange Rate 0.03 0.03  
Exchange Rate 0.03   0.03
Colombia, Pesos [member]      
Disclosure of foreign exchange rates [line items]      
Average Exchange Rate 0.01 0.01  
Exchange Rate 0.01   0.01
Nicaragua, Cordobas      
Disclosure of foreign exchange rates [line items]      
Average Exchange Rate 0.58 0.61  
Exchange Rate 0.59   0.61
Argentina, Pesos [member]      
Disclosure of foreign exchange rates [line items]      
Average Exchange Rate 0.44 0.80  
Exchange Rate 0.34   0.52
Brazil, Brazil Real [member]      
Disclosure of foreign exchange rates [line items]      
Average Exchange Rate 4.96 5.32  
Exchange Rate 4.72   5.08
Philippin peso      
Disclosure of foreign exchange rates [line items]      
Average Exchange Rate   0.36  
Exchange Rate     0.37
Uruguay, Pesos      
Disclosure of foreign exchange rates [line items]      
Average Exchange Rate 0.56 0.63  
Exchange Rate 0.53   0.61
Panama [member] | United States of America, Dollars [member]      
Disclosure of foreign exchange rates [line items]      
Average Exchange Rate 19.25 19.04  
Exchange Rate 19.64   19.68