Borrowings - Credit Facilities (Details)
$ in Thousands
6 Months Ended
Jun. 30, 2016
USD ($)
Dec. 31, 2015
USD ($)
Debt Instrument [Line Items]    
Repayment installments 16  
Amount outstanding $ 254,956 $ 233,136
Secured debt    
Debt Instrument [Line Items]    
Repayment of debt $ 18,080  
Variable rate basis LIBOR  
Minimum liquidity $ 40,000  
Secured debt | Minimum    
Debt Instrument [Line Items]    
Maturity date Sep. 30, 2018  
Interest rate spread 2.25%  
Value to loan ratio 1.15  
Net total debt to assets 0.75  
Secured debt | Minimum | Covenants waived for three to five quarters    
Debt Instrument [Line Items]    
Value to loan ratio 0.9  
Net total debt to assets 0.8  
Secured debt | Maximum    
Debt Instrument [Line Items]    
Maturity date Nov. 30, 2022  
Interest rate spread 3.60%  
Value to loan ratio 1.3  
Net total debt to assets 0.8  
Secured debt | Maximum | Covenants waived for three to five quarters    
Debt Instrument [Line Items]    
Value to loan ratio 1.3  
Net total debt to assets 0.9  
Loan Facility DVB Bank SE ($41,000) to finance the acquisition of Navios Mars and Navios Sphera    
Debt Instrument [Line Items]    
Amount drawn down $ 39,900  
Unsecured Credit Facility    
Debt Instrument [Line Items]    
Maximum borrowing capacity 41,964  
Line of credit facility remaining borrowing capacity $ 14,140