Subsequent Events (Details)
€ in Thousands, $ in Thousands
6 Months Ended 7 Months Ended 8 Months Ended
Jun. 30, 2018
USD ($)
Jun. 30, 2018
EUR (€)
Jun. 30, 2017
USD ($)
Jul. 31, 2018
USD ($)
Aug. 24, 2018
USD ($)
Jul. 03, 2018
USD ($)
Jun. 30, 2018
EUR (€)
Subsequent Event [Line Items]              
Cash consideration for purchase of vessel $ 10,255   $ 0        
Navios Achilles              
Subsequent Event [Line Items]              
Vessel capacity in DWT 52,063 dwt 52,063 dwt          
Vessel year built 2001 2001          
Vessel sale price       $ 8,085      
Disposal date Jul. 31, 2018 Jul. 31, 2018          
Navios Primavera              
Subsequent Event [Line Items]              
Vessel capacity in DWT 53,464 dwt 53,464 dwt          
Vessel year built 2007 2007          
River and estuary tanker | Shipbuilder              
Subsequent Event [Line Items]              
Date of delivery Aug. 17, 2018 Aug. 17, 2018          
River and estuary tanker | Navios Logistics              
Subsequent Event [Line Items]              
Contractual Obligation $ 14,443           € 12,400
Fixed interest rate 6.75%           6.75%
Repayment installments 24 24          
River and estuary tanker | Navios Logistics | Shipbuilder              
Subsequent Event [Line Items]              
Percentage financed by third party 50.00% 50.00%          
River and estuary tanker | Navios Logistics | Maximum              
Subsequent Event [Line Items]              
Amount financed by third party $ 7,222 € 6,200          
Navios Partners | Navios Mars              
Subsequent Event [Line Items]              
Vessel capacity in DWT 181,259 dwt 181,259 dwt          
Vessel year built 2016 2016          
Navios Partners | Navios Sphera              
Subsequent Event [Line Items]              
Vessel capacity in DWT 84,872 dwt 84,872 dwt          
Vessel year built 2016 2016          
Subsequent event | Navios Achilles              
Subsequent Event [Line Items]              
Vessel sale price           $ 8,085  
Subsequent event | Navios Primavera              
Subsequent Event [Line Items]              
Cash consideration for purchase of vessel         $ 10,479    
Deposit upon signing of contract         $ 1,063    
Date of delivery         Q4 2018    
Subsequent event | Newbuilding bulk carrier              
Subsequent Event [Line Items]              
Vessel capacity in DWT         81,000 dwt    
Deposit for option acquisition         $ 5,820    
Date of delivery         Q2 2020    
Subsequent event | Navios Partners | Navios Sphera and Navios Mars              
Subsequent Event [Line Items]              
Contractual Obligation       $ 79,000      
Date of delivery       Q3 2018