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Borrowings - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 21, 2017
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Disclosure of detailed information about borrowings [line items]        
Issuance of senior notes   $ 495,678 $ 0 $ 0
Senior Notes due 2027        
Disclosure of detailed information about borrowings [line items]        
Issuance of senior notes $ 495,700      
Notes and debentures issued $ 500,000      
Senior Notes due 2027 | Fixed interest rate        
Disclosure of detailed information about borrowings [line items]        
Borrowings, interest rate 6.00%      
Brazilian Subsidiaries        
Disclosure of detailed information about borrowings [line items]        
Borrowings, interest rate basis   1.84% 1.32%  
Brazilian Subsidiaries | Bottom of range        
Disclosure of detailed information about borrowings [line items]        
Borrowings, adjustment to interest rate basis   4.13%    
Brazilian Subsidiaries | Top of range        
Disclosure of detailed information about borrowings [line items]        
Borrowings, adjustment to interest rate basis   17.52%    
Brazilian Subsidiaries | Fixed interest rate | Bottom of range        
Disclosure of detailed information about borrowings [line items]        
Borrowings, interest rate   2.50%    
Brazilian Subsidiaries | Fixed interest rate | Top of range        
Disclosure of detailed information about borrowings [line items]        
Borrowings, interest rate   9.00%    
Argentina Subsidiaries | LIBOR Variable Rate Basis        
Disclosure of detailed information about borrowings [line items]        
Borrowings, interest rate basis   1.25%    
US Dollar | Argentina Subsidiaries | Fixed interest rate | Bottom of range        
Disclosure of detailed information about borrowings [line items]        
Borrowings, interest rate   6.11%    
US Dollar | Argentina Subsidiaries | Fixed interest rate | Top of range        
Disclosure of detailed information about borrowings [line items]        
Borrowings, interest rate   7.00%    
Argentine Peso | Argentina Subsidiaries | Fixed interest rate | Bottom of range        
Disclosure of detailed information about borrowings [line items]        
Borrowings, interest rate   9.90%    
Argentine Peso | Argentina Subsidiaries | Fixed interest rate | Top of range        
Disclosure of detailed information about borrowings [line items]        
Borrowings, interest rate   28.75%