Transactions with Related Parties - Vessels Charter Hire and Management Fees (Details) - USD ($)
 1 Months Ended 2 Months Ended 5 Months Ended 9 Months Ended 11 Months Ended 12 Months Ended
Jan. 31, 2016
Dec. 31, 2017
Jun. 07, 2017
Jun. 05, 2015
Oct. 31, 2017
Nov. 30, 2016
Nov. 18, 2014
Dec. 13, 2013
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Voyage expenses                 $ 651,000 $ 1,711,000 $ 39,727,000
Navios Apollon | Extended charter hire agreement                      
Date of agreement                 Apr. 30, 2015    
Lease term                 one year    
Charter hire daily rate                 $ 12,500    
Profit sharing, Percentage allocation based on earnings                 50.00%    
Navios Libra | Extended charter hire agreement                      
Date of agreement                 Apr. 30, 2015    
Lease term                 one year    
Charter hire daily rate                 $ 12,000    
Profit sharing, Percentage allocation based on earnings                 50.00%    
Navios Felicity | Extended charter hire agreement                      
Date of agreement                 Apr. 30, 2015    
Lease term                 one year    
Charter hire daily rate                 $ 12,000    
Profit sharing, Percentage allocation based on earnings                 50.00%    
Navios Hope | Extended charter hire agreement                      
Date of agreement                 Apr. 30, 2015    
Lease term                 one year    
Charter hire daily rate                 $ 10,000    
Profit sharing, Percentage allocation based on earnings                 50.00%    
Navios Fantastiks | Charter hire agreement                      
Charter hire daily rate                 $ 12,500    
Navios Gemini | Charter hire agreement                      
Charter hire daily rate                 7,600    
Navios Pollux | Charter hire agreement                      
Charter hire daily rate                 11,400    
Navios Sun, Navios Orbiter, Navios Soleil, Navios Alegria, Navios Harmony and Navios Hyperion | Charter hire agreement                      
Charter hire daily rate                 $ 12,000    
Navios Partners for the Navios Gemini, Navios Hyperion, Navios Soleil, Navios Harmony, Navios Orbiter, Navios Fantastiks, Navios Alegria, Navios Pollux and Navios Sun | Minimum                      
Lease term                 9 months    
Navios Partners for the Navios Gemini, Navios Hyperion, Navios Soleil, Navios Harmony, Navios Orbiter, Navios Fantastiks, Navios Alegria, Navios Pollux and Navios Sun | Maximum                      
Lease term                 12 months    
Navios Partners for the Navios Gemini, Navios Hyperion, Navios Soleil, Navios Harmony, Navios Orbiter, Navios Fantastiks, Navios Alegria, Navios Pollux and Navios Sun | Charter hire agreement                      
Profit sharing, Percentage allocation based on earnings                 50.00%    
Navios Fulvia | Charter hire agreement                      
Date of agreement                 Nov. 30, 2016    
Charter hire daily rate                 $ 11,500    
Duration of agreements           3 months          
Navios Partners                      
Termination date of the administrative services agreement                 December 31, 2022    
Management fees                 $ 62,157 59,209 56,504
Terms of reimbursement of fees and expenses under the management agreement                 Effective August 31, 2016, Navios Partners could, upon request to Navios Holdings, partially or fully defer the reimbursement of dry docking and other extraordinary fees and expenses under the management agreement to a later date, but not later than January 5, 2018, and if reimbursed on a later date, such amounts would bear interest at a rate of 1% per annum over LIBOR.    
Navios Partners | Ultra-Handymax vessel                      
Daily management fee $ 4,000 $ 4,200     $ 4,100            
Navios Partners | Panamax vessel                      
Daily management fee 4,100 4,300     4,200            
Navios Partners | Capesize vessel                      
Daily management fee 5,100 5,250     5,250            
Navios Partners | Container vessel of 6,800 TEU                      
Daily management fee 6,500 6,700     6,700            
Navios Partners | Container vessel more than 8,000 TEU                      
Daily management fee 7,200 7,400     7,400            
Navios Partners | Container vessel more than 13,000 TEU                      
Daily management fee $ 8,500 $ 8,750     $ 8,750            
Navios Acquisition                      
Termination date of the administrative services agreement                 May 2020    
Management fees                 $ 94,973,000 97,866,000 95,336,000
Navios Acquisition | Amendement of management agreement                      
Termination date of the administrative services agreement                 May 31, 2018    
Navios Acquisition | MR2 product tanker and chemical tanker vessel | Extended management agreement                      
Daily management fee                 $ 6,000    
Duration of agreements                 2 years    
Navios Acquisition | MR2 product tanker and chemical tanker vessel | Amendement of management agreement                      
Daily management fee                 $ 6,350    
Navios Acquisition | LR1 product tanker vessel | Extended charter hire agreement                      
Daily management fee                 $ 7,000    
Duration of agreements                 2 years    
Navios Acquisition | LR1 product tanker vessel | Amendement of management agreement                      
Daily management fee                 $ 7,150    
Navios Acquisition | VLCC vessel | Extended management agreement                      
Daily management fee                 $ 9,500    
Duration of agreements                 2 years    
Navios Acquisition | VLCC vessel | Amendement of management agreement                      
Daily management fee                 $ 9,500    
Navios Europe I                      
Management fees                 21,472,000 20,855,000 20,383,000
Navios Europe I | Management agreement                      
Duration of agreements               6 years      
Navios Midstream                      
Management fees                 $ 20,805,000 20,862,000 17,613,000
Navios Midstream | Management agreement                      
Duration of agreements             5 years        
Navios Midstream | VLCC vessel | Management agreement                      
Termination date of the administrative services agreement                 Dec. 31, 2018    
Daily management fee                 $ 9,500    
Navios Europe II                      
Management fees                 22,055,000 $ 23,527,000 $ 9,581,000
Navios Europe II | Management agreement                      
Duration of agreements       6 years              
Navios Containers | Management agreement                      
Management fees                 $ 16,702,000    
Duration of agreements     5 years                
Navios Containers | Automatic extension of management agreement                      
Duration of agreements                 5 years    
Navios Containers | Container vessel of 4,250 TEU                      
Daily management fee                 $ 6,100    
Navios Containers | Container vessel of 3,450 TEU                      
Daily management fee                 6,100    
Navios Containers | Container vessel of 5,500 TEU                      
Daily management fee                 $ 6,100