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Income taxes - Schedule of Statutory Tax Rates (Details) | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Income Taxes [Line Items] |  |  |
Statutory tax rate (as a percent) | 22.90% | 36.60% | 42.70%
Puerto Rico |  |  |
Income Taxes [Line Items] |  |  |
Statutory tax rate (as a percent) | 18.50% | 18.50% | 20.00%
Curacao |  |  |
Income Taxes [Line Items] |  |  |
Statutory tax rate (as a percent) | 22.00% | 22.00% | 22.00%
USVI |  |  |
Income Taxes [Line Items] |  |  |
Statutory tax rate (as a percent) | 22.50% | 22.50% | 22.50%
Aruba, Panama, Uruguay and Netherlands |  |  |
Income Taxes [Line Items] |  |  |
Statutory tax rate (as a percent) | 25.00% | 25.00% | 25.00%
Ecuador |  |  |
Income Taxes [Line Items] |  |  |
Statutory tax rate (as a percent) | 25.00% | 25.00% | 28.00%
Chile |  |  |
Income Taxes [Line Items] |  |  |
Statutory tax rate (as a percent) | 27.00% | 27.00% | 27.00%
Martinique, French Guyana and Guadeloupe |  |  |
Income Taxes [Line Items] |  |  |
Statutory tax rate (as a percent) | 28.00% | 31.00% | 33.30%
Peru |  |  |
Income Taxes [Line Items] |  |  |
Statutory tax rate (as a percent) | 29.50% | 29.50% | 29.50%
Trinidad and Tobago |  |  |
Income Taxes [Line Items] |  |  |
Statutory tax rate (as a percent) | 30.00% | 25.00% | 25.00%
Argentina Costa Rica and México |  |  |
Income Taxes [Line Items] |  |  |
Statutory tax rate (as a percent) | 30.00% | 30.00% | 30.00%
Colombia |  |  |
Income Taxes [Line Items] |  |  |
Statutory tax rate (as a percent) | 32.00% | 33.00% | 37.00%
Brazil and Venezuela |  |  |
Income Taxes [Line Items] |  |  |
Statutory tax rate (as a percent) | 34.00% | 34.00% | 34.00%

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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.Fact.4) -URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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