Borrowings - Navios Containers Loans (Details)
$ in Thousands
 4 Months Ended 6 Months Ended 8 Months Ended 9 Months Ended 12 Months Ended
Nov. 09, 2018
USD ($)
Jul. 02, 2018
USD ($)
Sep. 07, 2018
USD ($)
Sep. 30, 2017
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Debt Instrument [Line Items]            
Loan's discount         $ 27,905 $ 35,280
Navios Containers | ABN AMRO Bank N.V. ($71,000)            
Debt Instrument [Line Items]            
Amount outstanding         $ 0  
Navios Containers | ABN AMRO Bank N.V. ($71,000) | Initial Facility            
Debt Instrument [Line Items]            
Line of credit facility issuance date         Jul. 27, 2017  
Line of credit facility maximum borrowing capacity         $ 21,000  
Number of vessels financed         7  
Loan margin percentage         4.00%  
Interest rate description         LIBOR plus 400 basis points  
Amount drawn down       $ 21,000    
Navios Containers | ABN AMRO Bank N.V. ($71,000) | Facility Extension            
Debt Instrument [Line Items]            
Line of credit facility issuance date         Dec. 01, 2017  
Line of credit facility maximum borrowing capacity         $ 50,000  
Number of vessels financed         4  
Loan margin percentage         4.00%  
Interest rate description         LIBOR plus 400 basis points  
Amount drawn down           $ 50,000
Navios Containers | ABN AMRO Bank N.V. ($50,000)            
Debt Instrument [Line Items]            
Line of credit facility issuance date         Dec. 03, 2018  
Line of credit facility maximum borrowing capacity         $ 50,000  
Number of loan tranches         2  
Loan margin percentage         3.50%  
Interest rate description         LIBOR plus 350 basis points  
Amount drawn down         $ 50,000  
Loan's discount         $ 500  
Number of repayment installments         16  
Repayment frequency         quarterly  
Balloon payment on the last repayment date         $ 12,475  
Expiration date         Dec. 31, 2022  
Navios Containers | ABN AMRO Bank N.V. ($50,000) | Tranche A            
Debt Instrument [Line Items]            
Number of vessels financed         4  
Number of vessels partially financed         1  
Amount of each tranche         $ 41,200  
Navios Containers | ABN AMRO Bank N.V. ($50,000) | Tranche B            
Debt Instrument [Line Items]            
Number of vessels financed         1  
Amount of each tranche         $ 8,800  
Navios Containers | ABN AMRO Bank N.V. ($50,000) | First Four Installments            
Debt Instrument [Line Items]            
Repayment installment         4,000  
Navios Containers | ABN AMRO Bank N.V. ($50,000) | Fifth Installment            
Debt Instrument [Line Items]            
Repayment installment         3,375  
Navios Containers | ABN AMRO Bank N.V. ($50,000) | Subsequent 11 Installments            
Debt Instrument [Line Items]            
Repayment installment         $ 1,650  
Navios Containers | BNP Paribas ($25,000)            
Debt Instrument [Line Items]            
Line of credit facility issuance date         May 25, 2018  
Line of credit facility maximum borrowing capacity         $ 25,000  
Number of vessels financed         1  
Loan margin percentage         3.00%  
Interest rate description         LIBOR plus 300 basis points  
Amount drawn down         $ 25,000  
Number of repayment installments         18  
Repayment frequency         quarterly  
Repayment installment         $ 695  
Balloon payment on the last repayment date         $ 11,110  
Expiration date         May 31, 2023  
Navios Containers | BNP Paribas ($24,000) | Initial Facility            
Debt Instrument [Line Items]            
Line of credit facility issuance date         Dec. 20, 2017  
Line of credit facility maximum borrowing capacity         $ 24,000  
Number of loan tranches         4  
Number of vessels financed         4  
Loan margin percentage         3.00%  
Interest rate description         LIBOR plus 300 basis points  
Amount drawn down         $ 24,000  
Amount of each tranche         $ 6,000  
Navios Containers | BNP Paribas ($24,000) | Facility Extension            
Debt Instrument [Line Items]            
Line of credit facility issuance date         Sep. 30, 2018  
Line of credit facility maximum borrowing capacity         $ 9,000  
Number of vessels financed         1  
Loan margin percentage         3.00%  
Interest rate description         LIBOR plus 300 basis points  
Amount drawn down     $ 9,000      
Amount outstanding         $ 8,679  
Number of repayment installments         19  
Repayment frequency         quarterly  
Repayment installment         $ 322  
Balloon payment on the last repayment date         $ 2,570  
Expiration date         Sep. 30, 2023  
Navios Containers | BNP Paribas ($24,000) | First Three Tranches | Initial Facility            
Debt Instrument [Line Items]            
Amount outstanding         $ 15,428  
Number of repayment installments         16  
Repayment frequency         quarterly  
Repayment installment         $ 643  
Balloon payment on the last repayment date         $ 5,142  
Expiration date         Dec. 22, 2022  
Navios Containers | BNP Paribas ($24,000) | Fourth Tranche | Initial Facility            
Debt Instrument [Line Items]            
Amount outstanding         $ 5,357  
Number of repayment installments         17  
Repayment frequency         quarterly  
Repayment installment         $ 214  
Balloon payment on the last repayment date         $ 1,714  
Expiration date         Feb. 28, 2023  
Navios Containers | HSH ($36,000)            
Debt Instrument [Line Items]            
Line of credit facility issuance date         Jun. 28, 2018  
Line of credit facility maximum borrowing capacity         $ 36,000  
Number of vessels financed         2  
Loan margin percentage         3.25%  
Interest rate description         LIBOR plus 325 basis points  
Amount drawn down   $ 36,000        
Number of repayment installments         14  
Repayment frequency         quarterly  
Repayment installment         $ 1,200  
Balloon payment on the last repayment date         $ 15,200  
Expiration date         Jun. 30, 2022  
Navios Containers | HSH facility agreement            
Debt Instrument [Line Items]            
Line of credit facility issuance date         Nov. 09, 2018  
Number of loan tranches         4  
Vessel capacity in TEU         10,000 TEU  
Number of vessels financed         4  
Loan margin percentage         3.25%  
Interest rate description         LIBOR plus 325 basis points  
Loan commitment fee per annum on the undrawn loan amount         0.75%  
Amount drawn down         $ 0  
Amount of each tranche         $ 31,800  
Navios Containers | HSH facility agreement | Each Tranche            
Debt Instrument [Line Items]            
Number of repayment installments         19  
Repayment frequency         quarterly  
Repayment installment         $ 678  
Balloon payment on the last repayment date         $ 18,918  
Expiration date         Jul. 31, 2023  
Financial liability | Navios Containers            
Debt Instrument [Line Items]            
Line of credit facility issuance date         May 25, 2018  
Sale and leaseback transaction, net proceeds financing activities         $ 119,000  
Number of containerships under sale and leaseback transaction         18  
Contractual obligation         $ 45,100  
Financial liability | Navios Containers | Fourteen Vessels            
Debt Instrument [Line Items]            
Sale and leaseback transaction, net proceeds financing activities $ 90,200          
Financial liability | Navios Containers | Fourteen Vessels | Per Vessel            
Debt Instrument [Line Items]            
Sale and leaseback transaction, number of repayment installments         60  
Sale and leaseback transaction, frequency of repayment installments         monthly  
Sale and leaseback transaction, monthly rental payments         $ 1,097