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Income Taxes (Schedule of Statutory Tax Rates) (Details) | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Income Taxes [Line Items] |  |  |
Statutory tax rate (as a percent) | 35.50% | 35.40% | 32.80%
Puerto Rico [Member] |  |  |
Income Taxes [Line Items] |  |  |
Statutory tax rate (as a percent) | 20.00% | 20.00% | 20.00%
Argentina, Martinique, French Guyana, Guadeloupe, St Croix, St Thomas, Aruba And Curacao [Member] |  |  |
Income Taxes [Line Items] |  |  |
Statutory tax rate (as a percent) | 35.00% | 35.00% | 35.00%
Brazil And Venezuela [Member] |  |  |
Income Taxes [Line Items] |  |  |
Statutory tax rate (as a percent) | 34.00% | 34.00% | 34.00%
Colombia [Member] |  |  |
Income Taxes [Line Items] |  |  |
Statutory tax rate (as a percent) | 40.00% | 40.00% | 39.00%
Peru [Member] |  |  |
Income Taxes [Line Items] |  |  |
Statutory tax rate (as a percent) | 30.00% | 28.00% | 28.00%
Costa Rica and Mexico [Member] |  |  |
Income Taxes [Line Items] |  |  |
Statutory tax rate (as a percent) | 30.00% | 30.00% | 30.00%
Panama, Uruguay, Trinidad And Tobago And Netherlands [Member] |  |  |
Income Taxes [Line Items] |  |  |
Statutory tax rate (as a percent) | 25.00% | 25.00% | 25.00%
Chile [Member] |  |  |
Income Taxes [Line Items] |  |  |
Statutory tax rate (as a percent) | 26.00% | 24.00% | 22.50%

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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/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32698-109319 + Details
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