Income Taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Income before taxes $ (167,979) $ (298,884) $ (129,221)
Income tax (benefit)/expense $ (3,192) $ 1,265 $ (3,154)
Argentina      
Income tax rate 35.00%    
Effective Tax Rate On Corporate Assets 1.00%    
Tax rate on revenues 5.00% 5.00% 5.00%
Paraguay      
Options to determine income tax liabilities Under the first option income tax liabilities for the current and prior periods are measured at the amount expected to be paid to the taxation authorities, by applying the tax rate of 10% on the fiscal profit and loss. 50% of revenues derived from international freights are considered Paraguayan sourced (and therefore taxed) if carried between Paraguay and Argentina, Bolivia, Brazil or Uruguay. Alternatively, only 30% of revenues derived from international freights are considered Paraguayan sourced.    
Income tax rate 10.00%    
Tax rate on revenues 1.00%    
Corporate Income Tax Rate 10.00%    
Brazil      
Corporate Income Tax Rate 34.00%    
If carried between Paraguay and Argentina, Bolivia, Brazil or Uruguay | Revenue      
Amount concentration percentage 50.00%    
Alternative scenario | Revenue      
Amount concentration percentage 30.00%    
For the year 2018 | Argentina      
Income tax rate 30.00%    
From 2019 onwards | Argentina      
Income tax rate 25.00%    
From January 2018 | Argentina      
Tax rate on revenues 3.00%