Vessels, Port Terminals and Other Fixed Assets - Impairment Loss/ Loss on Sale of Vessels, Net 2018 (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Aug. 31, 2018
Jul. 31, 2018
Mar. 31, 2018
Property Plant And Equipment [Line Items]            
Impairment loss and gain/(loss) on sale of vessels $ (88,367) $ (156,106) $ (200,657)      
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