Business Combinations, Goodwill and Intangible Assets - Table Showing Changes in Carrying Amount of Goodwill (Detail) (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Goodwill [Line Items]
Balance, beginning of the year	$ 55,101,218us-gaap_Goodwill	$ 60,366,063us-gaap_Goodwill
Business Acquisition	23,922,635us-gaap_GoodwillAcquiredDuringPeriod	2,668,661us-gaap_GoodwillAcquiredDuringPeriod
Effect of exchange rates changes	(10,195,349)	(7,933,506)
Balance, end of the year	68,828,504us-gaap_Goodwill	55,101,218us-gaap_Goodwill
Brazil [Member]
Goodwill [Line Items]
Balance, beginning of the year	10,366,018	10,706,281
Business Acquisition	1,538,278	1,307,644
Effect of exchange rates changes	(1,347,193)	(1,647,907)
Balance, end of the year	10,557,103	10,366,018
Argentina [Member]
Goodwill [Line Items]
Balance, beginning of the year	14,676,145	18,889,094
Business Acquisition	775,418	659,159
Effect of exchange rates changes	(3,592,495)	(4,872,108)
Balance, end of the year	11,859,068	14,676,145
Chile [Member]
Goodwill [Line Items]
Balance, beginning of the year	6,520,194	7,115,211
Business Acquisition	14,709,583
Effect of exchange rates changes	(2,128,326)	(595,017)
Balance, end of the year	19,101,451	6,520,194
Mexico [Member]
Goodwill [Line Items]
Balance, beginning of the year	11,376,140	11,404,780
Business Acquisition	6,293,463	186,806
Effect of exchange rates changes	(1,950,906)	(215,446)
Balance, end of the year	15,718,697	11,376,140
Venezuela [Member]
Goodwill [Line Items]
Balance, beginning of the year	5,251,667	4,846,030
Business Acquisition	477,180	405,637
Balance, end of the year	5,728,847	5,251,667
Colombia [Member]
Goodwill [Line Items]
Balance, beginning of the year	5,506,062	5,897,136
Business Acquisition	81,623	69,385
Effect of exchange rates changes	(1,066,229)	(460,459)
Balance, end of the year	4,521,456	5,506,062
Other Countries [Member]
Goodwill [Line Items]
Balance, beginning of the year	1,404,992	1,507,531
Business Acquisition	47,090	40,030
Effect of exchange rates changes	(110,200)	(142,569)
Balance, end of the year	$ 1,341,882	$ 1,404,992

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

-Topic 350

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Amount of increase (decrease) from foreign currency translation adjustments and purchase accounting adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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