Vessels, Port Terminals and Other Fixed Assets, Net 2 (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Aug. 31, 2018
Jul. 31, 2018
Mar. 31, 2018
Jul. 13, 2017
Jun. 16, 2017
Property Plant And Equipment [Line Items]                
Impairment loss and gain/(loss) on sale of vessels $ (156,106) $ (200,657) $ (50,565)          
Four dry bulk vessels held and used                
Property Plant And Equipment [Line Items]                
Impairment loss   179,186            
Navios Magellan                
Property Plant And Equipment [Line Items]                
Disposal date Dec. 31, 2018              
Year Built 2000              
Vessel capacity in DWT 74,333 dwt              
Vessel sale price   6,950            
Impairment loss and gain/(loss) on sale of vessels   (5,402)            
Capitalized Cost, Impairment Loss   726            
Navios Mars                
Property Plant And Equipment [Line Items]                
Year Built 2016              
Vessel capacity in DWT 181,259 dwt              
Navios Sphera                
Property Plant And Equipment [Line Items]                
Year Built 2016              
Vessel capacity in DWT 84,872 dwt              
Navios Mars and Navios Sphera                
Property Plant And Equipment [Line Items]                
Disposal date Aug. 31, 2018              
Vessel sale price       $ 79,000        
Impairment loss and gain/(loss) on sale of vessels   (2,759)            
Navios Achilles                
Property Plant And Equipment [Line Items]                
Disposal date Jul. 31, 2018              
Year Built 2001              
Vessel capacity in DWT 52,063 dwt              
Vessel sale price         $ 8,085      
Impairment loss and gain/(loss) on sale of vessels   (6,595)            
Capitalized Cost, Impairment Loss   584            
Navios Herakles                
Property Plant And Equipment [Line Items]                
Disposal date Mar. 31, 2018              
Year Built 2001              
Vessel capacity in DWT 52,061 dwt              
Vessel sale price           $ 7,682    
Impairment loss and gain/(loss) on sale of vessels   (6,715)            
Capitalized Cost, Impairment Loss   $ 481            
One dry bulk vessel held and used                
Property Plant And Equipment [Line Items]                
Impairment loss     32,930          
Navios Ionian                
Property Plant And Equipment [Line Items]                
Disposal date Jun. 16, 2017              
Year Built 2000              
Vessel capacity in DWT 52,067 dwt              
Vessel sale price               $ 5,280
Impairment loss and gain/(loss) on sale of vessels     (9,098)          
Capitalized Cost, Impairment Loss     551          
Navios Horizon                
Property Plant And Equipment [Line Items]                
Disposal date Jul. 13, 2017              
Year Built 2001              
Vessel capacity in DWT 50,346 dwt              
Vessel sale price             $ 6,548  
Impairment loss and gain/(loss) on sale of vessels     (5,141)          
Capitalized Cost, Impairment Loss     $ 495