Vessels, Port Terminals and Other Fixed Assets, Net (Details)
$ in Thousands
 1 Months Ended 6 Months Ended
Jun. 04, 2014
USD ($)
Jan. 27, 2014
USD ($)
Jun. 30, 2015
USD ($)
Jun. 30, 2014
USD ($)
Jan. 26, 2014
USD ($)
Property Plant And Equipment [Line Items]          
Number of vessels under construction         2
Deposits for vessel acquisitions     $ 6,625 $ 26,845  
Cash consideration for purchase of vessel     $ 0 $ 71,862  
Panamax vessel          
Property Plant And Equipment [Line Items]          
Vessel capacity in DWT     84,000    
Total consideration for acquisition of vessel         $ 31,800
Capesize vessel          
Property Plant And Equipment [Line Items]          
Vessel capacity in DWT     180,600    
Total consideration for acquisition of vessel         $ 52,000
Both newbuilding vessels          
Property Plant And Equipment [Line Items]          
Deposits for vessel acquisitions     $ 24,290    
Date of expected delivery     Q1 2016    
Navios Bonanza | Noncontrolling Interest          
Property Plant And Equipment [Line Items]          
Cash consideration for purchase of vessel   $ 3,484      
Navios Gem          
Property Plant And Equipment [Line Items]          
Vessel capacity in DWT     181,336    
Total consideration for acquisition of vessel $ 54,368        
Date of delivery     June 4, 2014    
Year built     2014    
Cash consideration for purchase of vessel 24,368        
Amount of loan used to finance purchase of vessel $ 30,000        
Navios Asia | Navios Bonanza          
Property Plant And Equipment [Line Items]          
Vessel capacity in DWT     76,596    
Total consideration for acquisition of vessel   17,634      
Date of delivery     January 27, 2014    
Year built     2006    
Cash consideration for purchase of vessel   2,900      
Amount of loan used to finance purchase of vessel   $ 11,250