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Segment and Geographic Information - Additional Information (Detail)
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12 Months Ended |
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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| Revenues from External Customers and Long-Lived Assets [Line Items] |
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| Number of business segment operated currently |
1 |
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| Geographic Concentration Risk [Member] |
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| Revenues from External Customers and Long-Lived Assets [Line Items] |
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| Percentage of fixed assets into company's net assets |
1.00% |
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| Geographic Concentration Risk [Member] | Minimum [Member] |
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| Revenues from External Customers and Long-Lived Assets [Line Items] |
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| Company's consolidated net revenue |
10.00% |
10.00% |
10.00% |
| Geographic Concentration Risk [Member] | Central America [Member] |
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| Revenues from External Customers and Long-Lived Assets [Line Items] |
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| Company's consolidated net revenue |
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14.00% |
16.00% |
| Geographic Concentration Risk [Member] | Peru [Member] |
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| Revenues from External Customers and Long-Lived Assets [Line Items] |
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| Company's consolidated net revenue |
25.00% |
20.00% |
11.00% |
| Geographic Concentration Risk [Member] | Mexico [Member] |
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| Revenues from External Customers and Long-Lived Assets [Line Items] |
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| Company's consolidated net revenue |
17.00% |
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| Geographic Concentration Risk [Member] | Guatemala [Member] |
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| Revenues from External Customers and Long-Lived Assets [Line Items] |
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| Company's consolidated net revenue |
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15.00% |
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| Geographic Concentration Risk [Member] | Puerto Rico [Member] |
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| Revenues from External Customers and Long-Lived Assets [Line Items] |
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| Company's consolidated net revenue |
12.00% |
13.00% |
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