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Due to Shareholders of Acquired Companies - Summary of Amounts Due to Shareholders of Acquired Companies (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Dec. 31, 2018
Business Acquisition [Line Items]    
Total due to shareholders of acquired companies $ 46,295 $ 45,391
Less: Current portion of due to shareholders of acquired companies 25,251 23,820
Due to shareholders of acquired companies, less current portion 21,044 21,571
Universidade Anhembi Morumbi (UAM Brazil)    
Business Acquisition [Line Items]    
Total due to shareholders of acquired companies $ 31,744 30,912
Universidade Anhembi Morumbi (UAM Brazil) | Certificados de Depósitos Interbancários (CDI) | Related Party Notes Payable    
Business Acquisition [Line Items]    
Basis spread on variable rate 2.00%  
University of St. Augustine for Health Sciences, LLC (St. Augustine)    
Business Acquisition [Line Items]    
Total due to shareholders of acquired companies $ 11,395 11,395
Interest Rate % 7.00%  
Faculdade Porto-Alegrense (FAPA)    
Business Acquisition [Line Items]    
Total due to shareholders of acquired companies $ 2,030 1,943
IADE Group    
Business Acquisition [Line Items]    
Total due to shareholders of acquired companies $ 1,126 $ 1,141
Interest Rate % 3.00%