Intangible Assets/Liabilities Other Than Goodwill (Table) (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Trade name    
Acquired Finite Lived Intangible Assets [Line Items]    
Acquisition Cost $ 90,000 $ 90,000
Accumulated Amortization (43,175) (40,357)
Net Book Value 46,825 49,643
Port terminal operating rights    
Acquired Finite Lived Intangible Assets [Line Items]    
Acquisition Cost 53,152 53,152
Accumulated Amortization (13,835) (12,837)
Net Book Value 39,317 40,315
Customer relationships    
Acquired Finite Lived Intangible Assets [Line Items]    
Acquisition Cost 35,490 35,490
Accumulated Amortization (23,069) (21,294)
Net Book Value 12,421 14,196
Favorable lease terms – Navios Containers    
Acquired Finite Lived Intangible Assets [Line Items]    
Acquisition Cost   31,342
Accumulated Amortization   (16,855)
Net Book Value   14,487
Navios Containers deconsolidation    
Acquired Finite Lived Intangible Assets [Line Items]    
Acquisition Cost   (31,342)
Accumulated Amortization   16,855
Net Book Value   (14,487)
Total Intangible assets    
Acquired Finite Lived Intangible Assets [Line Items]    
Acquisition Cost 178,642 178,642
Accumulated Amortization (80,079) (74,488)
Net Book Value $ 98,563 $ 104,154