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Due to Shareholders of Acquired Companies - Additional Information (Details) € in Thousands, BRL in Thousands, $ in Thousands |  | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 12, 2017 USD ($) | Sep. 12, 2017 BRL | Jun. 30, 2017 USD ($) | Jun. 30, 2017 EUR (€) | Jun. 30, 2017 tranche | Sep. 30, 2017 USD ($) | Sep. 30, 2017 EUR (€) | Dec. 31, 2016 USD ($) | Sep. 12, 2014 BRL
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Promissory notes payable |  |  |  |  |  | $ 81,175 |  | $ 210,948 |
IADE Group |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Number of payment tranches (tranche) | tranche |  |  |  |  | 2 |  |  |  |
Payment tranche, value | € |  |  |  |  |  |  | € 1,000 |  |
Payment term for tranche one |  |  |  |  | 36 months |  |  |  |
Payment term for tranche two |  |  |  |  | 60 months |  |  |  |
Promissory notes payable |  |  |  |  |  | 2,358 |  | 2,755 |
Faculdades Metropolitanas Unidas Educacionais (FMU) |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Promissory notes payable |  |  |  |  |  | $ 0 |  | $ 100,382 | BRL 250,000
Notes Payable | IADE Group |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Liability settled |  |  | $ 694 | € 639 |  |  |  |  |
Notes Payable | Faculdades Metropolitanas Unidas Educacionais (FMU) |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Liability settled | $ 114,578 | BRL 358,606 |  |  |  |  |  |  |

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