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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
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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 |  |  |

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