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Significant Accounting Policies - Summary of Average Exchange Rate (Detail) | 12 Months Ended
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Dec. 31, 2018 $ / $ ExchangeRate | Dec. 31, 2017 ExchangeRate | Dec. 31, 2016 ExchangeRate
Disclosure of foreign exchange rates [line items] |  |  |
Exchange Rate | $ / $ | 19.6350 |  |
Mexico, Pesos [member] |  |  |
Disclosure of foreign exchange rates [line items] |  |  |
Average Exchange Rate | 1.00 | 1.00 | 1.00
Exchange Rate | 1.00 | 1.00 |
Guatemala, Quetzales |  |  |
Disclosure of foreign exchange rates [line items] |  |  |
Average Exchange Rate | 2.56 | 2.57 | 2.46
Exchange Rate | 2.54 | 2.69 |
Costa Rica, Colones |  |  |
Disclosure of foreign exchange rates [line items] |  |  |
Average Exchange Rate | 0.03 | 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 | 0.01
Exchange Rate | 0.01 | 0.01 |
Nicaragua, Cordobas |  |  |
Disclosure of foreign exchange rates [line items] |  |  |
Average Exchange Rate | 0.62 | 0.63 | 0.65
Exchange Rate | 0.61 | 0.64 |
Argentina, Pesos [member] |  |  |
Disclosure of foreign exchange rates [line items] |  |  |
Average Exchange Rate | 0.73 | 1.15 | 1.26
Exchange Rate | 0.52 | 1.06 |
Brazil, Brazil Real [member] |  |  |
Disclosure of foreign exchange rates [line items] |  |  |
Average Exchange Rate | 5.29 | 5.94 | 5.39
Exchange Rate | 5.08 | 5.97 |
Philippines, Pesos |  |  |
Disclosure of foreign exchange rates [line items] |  |  |
Average Exchange Rate | 0.37 | 0.38 | 0.39
Exchange Rate | 0.37 | 0.40 |
Uruguay, Pesos |  |  |
Disclosure of foreign exchange rates [line items] |  |  |
Average Exchange Rate | 0.63 | 0.66 | 0.71
Exchange Rate | 0.61 | 0.69 |
Panama [member] | United States of America, Dollars [member] |  |  |
Disclosure of foreign exchange rates [line items] |  |  |
Average Exchange Rate | 19.24 | 18.93 | 18.66
Exchange Rate | 19.68 | 19.74 |

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- Definition The average exchange rate used by the entity. Exchange rate is the ratio of exchange for two currencies. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_112_c&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The spot exchange rate at the end of the reporting period. Exchange rate is the ratio of exchange for two currencies. Spot exchange rate is the exchange rate for immediate delivery. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_112_c&doctype=Standard -URIDate 2018-03-16 + Details
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