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Investments in unconsolidated companies - Narratives (Details)
$ in Thousands
1 Months Ended
Apr. 30, 2011
Jun. 30, 2017
USD ($)
hotel
Dec. 31, 2016
USD ($)
Jun. 30, 2007
USD ($)
Schedule of Cost and Equity Method Investments [Line Items]        
Ownership percentage in equity method investment   50.00%    
State of Rio de Janeiro, initial expropriation period 5 years      
Number of hotels | hotel   36    
Equity method investments current liabilities   $ 92,372 $ 89,785  
Peruvian rail joint venture        
Schedule of Cost and Equity Method Investments [Line Items]        
Ownership percentage in equity method investment   50.00%    
Peruvian rail joint venture | Guarantee of Governmental Concession | Variable Interest Entity, Not Primary Beneficiary        
Schedule of Cost and Equity Method Investments [Line Items]        
Guarantor obligations, maximum exposure   $ 9,899    
Eastern and Oriental Express Ltd.        
Schedule of Cost and Equity Method Investments [Line Items]        
Ownership percentage in equity method investment   25.00%    
Buzios land joint venture        
Schedule of Cost and Equity Method Investments [Line Items]        
Ownership percentage in equity method investment   50.00%   50.00%
Cash consideration       $ 5,000
Peruvian hotel and rail joint ventures        
Schedule of Cost and Equity Method Investments [Line Items]        
Ownership percentage in equity method investment   50.00%    
Peruvian hotel and rail joint ventures | Guarantees        
Schedule of Cost and Equity Method Investments [Line Items]        
Ownership percentage in equity method investment   50.00%    
Peruvian hotel joint venture        
Schedule of Cost and Equity Method Investments [Line Items]        
Ownership percentage in equity method investment   50.00%    
Number of hotels | hotel   5    
Peruvian hotel joint venture | Contingent Financial Guarantee Additional Debt 2020        
Schedule of Cost and Equity Method Investments [Line Items]        
Guarantor obligations, maximum exposure   $ 16,801    
Third-party Debt        
Schedule of Cost and Equity Method Investments [Line Items]        
Equity method investments current liabilities   $ 21,476 $ 21,021