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Commitments and Contingencies - Noncontrolling Interest Holder Put Agreements and Company Call Arrangements (Details)
RM in Thousands, $ in Thousands
12 Months Ended
Jul. 11, 2017
USD ($)
Dec. 31, 2018
USD ($)
campus
option
Dec. 31, 2018
MYR (RM)
campus
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Mar. 28, 2016
Redeemable Noncontrolling Interest [Line Items]            
Purchase of noncontrolling interest   $ 350   $ 917 $ 613  
Discontinued Operations, Held-for-sale | INTI Education Holdings Sdn Bhd            
Redeemable Noncontrolling Interest [Line Items]            
Noncontrolling interest, noncontrolling owners, ownership percent   10.10%        
INTI Education Holdings Sdn Bhd            
Redeemable Noncontrolling Interest [Line Items]            
Number of campuses of higher education institutions (campus) | campus   5 5      
Noncontrolling interest, noncontrolling owners, ownership percent       10.10%    
Pearl Retail Solutions Private Limited and Creative Arts Education Society            
Redeemable Noncontrolling Interest [Line Items]            
Noncontrolling interest, noncontrolling owners, ownership percent           45.00%
Pearl Retail Solutions Private Limited            
Redeemable Noncontrolling Interest [Line Items]            
Noncontrolling interest, noncontrolling owners, ownership percent       10.00%    
Puttable Non-controlling Interest            
Redeemable Noncontrolling Interest [Line Items]            
Total redeemable noncontrolling interests and equity   $ 12,683        
Total noncontrolling interest holder put arrangements   12,683        
Puttable Common Stock            
Redeemable Noncontrolling Interest [Line Items]            
Total redeemable noncontrolling interests and equity   10,609        
Puttable Common Stock | INTI Education Holdings Sdn Bhd            
Redeemable Noncontrolling Interest [Line Items]            
Total noncontrolling interest holder put arrangements   $ 10,609        
Number of options (option) | option   1        
Noncontrolling interest, noncontrolling owners, ownership percent   10.10%        
Option exercise term   30 days 30 days      
Purchase price multiple of EBITDA   8 8      
Income before income tax, depreciation and amortization     RM 40,000 $ 9,570    
Additional purchase price multiple of EBITDA   6 6      
Option expiration term   30 days 30 days      
Puttable Common Stock | Pearl Retail Solutions Private Limited and Creative Arts Education Society            
Redeemable Noncontrolling Interest [Line Items]            
Noncontrolling interest, noncontrolling owners, ownership percent 10.00%         45.00%
Noncontrolling interest, noncontrolling owners, interest acquired 35.00%          
Purchase of noncontrolling interest $ 11,400          
Puttable Common Stock | Pearl Retail Solutions Private Limited            
Redeemable Noncontrolling Interest [Line Items]            
Total redeemable noncontrolling interests and equity   $ 2,012        
Total noncontrolling interest holder put arrangements   2,012        
Callable Noncontrolling Interest, Common Stock | Pearl Retail Solutions Private Limited and Creative Arts Education Society            
Redeemable Noncontrolling Interest [Line Items]            
Noncontrolling interest, noncontrolling owners, ownership percent           35.00%
Percentage of noncontrolling interest of ownership percentage by noncontrolling owners           78.00%
Puttable common stock - not currently redeemable            
Redeemable Noncontrolling Interest [Line Items]            
Total redeemable noncontrolling interests and equity   1,713   $ 2,286    
Total noncontrolling interest holder put arrangements   $ 0