Vessels, Port Terminal and Other Fixed Assets, Net - Navios Logistics (Details)
€ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2017
USD ($)
Dec. 31, 2017
EUR (€)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2017
EUR (€)
May 18, 2017
USD ($)
Feb. 28, 2017
USD ($)
Jun. 03, 2016
USD ($)
Property Plant And Equipment [Line Items]                
Purchase price obligation $ 0   $ 17,617          
Payments for construction in process 36,589   86,911 $ 26,713        
Repayments of obligations under capital leases 12,374   3,032 1,501        
Vessels, port terminals and other fixed assets, net 1,809,225   1,821,101          
Prepaid expenses and other current assets 27,383   28,896          
Other long term assets 4,856   2,647          
Gain on sale of assets $ 1,064   0 $ 0        
Ferni H                
Property Plant And Equipment [Line Items]                
Vessel Capacity 16,871 dwt 16,871 dwt            
San San H                
Property Plant And Equipment [Line Items]                
Vessel Capacity 16,871 dwt 16,871 dwt            
Ferni H and San San H                
Property Plant And Equipment [Line Items]                
Repayments of obligations under capital leases     3,032          
Vessel acquisition cost           $ 11,239    
Three new pushboats, price per each                
Property Plant And Equipment [Line Items]                
Total purchase price               $ 7,344
Payments for construction in process $ 30,708   16,156          
Date of expected delivery February 2018 February 2018            
Expansion of its dry port                
Property Plant And Equipment [Line Items]                
Payments for construction in process     120,735          
Capitalized interest costs $ 9,971   $ 6,862          
Vessels, port terminals and other fixed assets, net 137,357              
River and estuary tanker                
Property Plant And Equipment [Line Items]                
Total purchase price 14,854       € 12,400      
Payments for construction in process $ 6,141              
Date of expected delivery Q2 2018 Q2 2018            
Capitalized interest costs $ 205              
River and estuary tanker | Maximum                
Property Plant And Equipment [Line Items]                
Amount financed by third party $ 7,427 € 6,200            
River and estuary tanker | Shipbuilder                
Property Plant And Equipment [Line Items]                
Percentage financed by third party 50.00% 50.00%            
Formosa and San Lorenzo                
Property Plant And Equipment [Line Items]                
Vessel sale price             $ 1,109  
Prepaid expenses and other current assets $ 318              
Other long term assets 500              
Gain on sale of assets 1,075              
Covers for Dry Barges                
Property Plant And Equipment [Line Items]                
Total purchase price 1,115              
Payments for construction in process $ 629