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Commitments and Contingencies - Other Loss Contingencies (Details)
$ in Thousands
1 Months Ended 6 Months Ended
Sep. 12, 2014
Apr. 30, 2013
Jun. 30, 2017
USD ($)
defendant
Dec. 31, 2016
USD ($)
Loss Contingencies [Line Items]        
Indemnification assets     $ 93,203 $ 97,607
UAM Brazil        
Loss Contingencies [Line Items]        
Noncontrolling interest, noncontrolling owners, ownership percent   49.00%    
Repayment Guarantee for Loans that Financed a Portion of the Purchase Price        
Loss Contingencies [Line Items]        
Percentage of shares as guarantee of payment obligations 75.00%      
Repayment Guarantee for Obligations Under the Purchase Agreement for the Seller Notes        
Loss Contingencies [Line Items]        
Percentage of shares as guarantee of payment obligations 25.00%      
Pending Litigation        
Loss Contingencies [Line Items]        
Contingent liabilities recorded     $ 22,000 18,000
Pending Litigation | Hunan International Economics University (HIEU)        
Loss Contingencies [Line Items]        
Number of defendants | defendant     5  
Pending Litigation | Hunan International Economics University (HIEU) | Financial Guarantee        
Loss Contingencies [Line Items]        
Guarantor obligations, amount of loan     $ 29,000  
Taxes, Other-Than-Income Tax        
Loss Contingencies [Line Items]        
Loss contingency, statues of limitations     10 years  
Income Tax Contingencies        
Loss Contingencies [Line Items]        
Contingent liabilities recorded     $ 108,542 103,471
Guarantee of Indebtedness of Others | Chile        
Loss Contingencies [Line Items]        
Loss contingency, noncurrent     27,854 20,636
Guarantee amount, maximum potential amount of payments     496,000 479,000
Guarantee Obligations        
Loss Contingencies [Line Items]        
Percent of shares of company acquired in a business combination, used as a guarantee   49.00%    
Other Noncurrent Liabilities | Taxes, Other-Than-Income Tax        
Loss Contingencies [Line Items]        
Loss contingency, noncurrent     61,290 67,192
Other Current Liabilities | Taxes, Other-Than-Income Tax        
Loss Contingencies [Line Items]        
Loss contingency, current liability     $ 1,205 $ 1,896