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Commitments and Contingencies - Additional Information (Detail)
 0 Months Ended 0 Months Ended 1 Months Ended 6 Months Ended 0 Months Ended
Apr. 11, 2006
USD ($)
Jun. 30, 2014
USD ($)
LegalMatter
Mar. 31, 2007
USD ($)
Jun. 30, 2014
Remote [Member]
USD ($)
Jun. 30, 2014
Reasonably Possible but not Probable [Member]
USD ($)
Jun. 30, 2014
Argentinean Subsidiaries [Member]
Lawsuits
LegalMatter
Jun. 30, 2014
Mexican Subsidiaries [Member]
LegalMatter
Nov. 14, 2013
City of Sao Paulo Tax Claim [Member]
USD ($)
Nov. 14, 2013
City of Sao Paulo Tax Claim [Member]
BRL
Dec. 31, 2007
City of Sao Paulo Tax Claim [Member]
USD ($)
Jun. 30, 2014
City of Sao Paulo Tax Claim [Member]
BRL
Jun. 30, 2014
City of Sao Paulo Tax Claim [Member]
USD ($)
Sep. 23, 2010
State of Sao Paulo Fraud Claim [Member]
USD ($)
Aug. 25, 2010
State of Sao Paulo Fraud Claim [Member]
USD ($)
Jun. 26, 2009
State of Sao Paulo Fraud Claim [Member]
USD ($)
Loss Contingencies [Line Items]                              
Reserves for proceeding-related contingencies   $ 3,765,407                          
Aggregate amount for legal actions for which no loss amount has been accrued   5,505,944                          
Number of lawsuits pending           32                  
Number of legal actions pending   651       590 95                
Loss contingency pending cases related to consumer courts   3,126                          
Daily non-compliance penalty 5,300                         6,000 2,500
Fine against company's subsidiaries     3,500,000                        
Amount of reasonably possible loss   3,500,000   3,100,000 400,000                    
Penalty established on injunction per day                         6,000    
Approximate additional amount related to asserted taxes and fines               18,600,000 41,000,000 5,900,000          
Total amount of claim including surcharges and interest                       5,800,000      
Deposit with court                     9,500,000        
Accrued interests                     10,400,000 $ 4,700,000