Vessels, Port Terminals and Other Fixed Assets, Net (Table) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Property Plant And Equipment [Line Items]      
Balance $ 1,276,514    
Additions (71,015) $ (104,581) $ (102,839)
Transfers from deposits for vessels, port terminals and other fixed assets 0 0 49,421
Transfers to other long-term assets 0 0 (26)
Balance 1,139,539 1,276,514  
Cost      
Property Plant And Equipment [Line Items]      
Balance 1,809,195 2,524,610 2,553,047
Vessels upon obtaining control     376,133
Additions 4,565 11,628 12,354
Vessel acquisition 96,678 67,832 47,148
Vessel impairment (221,754) (274,067) (411,265)
Disposals     (156)
Disposals (87,823) (48,830) (101,717)
Write offs (548) (16,270) (329)
Transfers from deposits for vessels, port terminals and other fixed assets     49,421
Transfers to other long-term assets     (26)
Navios Containers deconsolidation   (455,708)  
Balance 1,600,313 1,809,195 2,524,610
Accumulated Depreciation      
Property Plant And Equipment [Line Items]      
Balance (532,681) (626,155) (743,822)
Vessels upon obtaining control     (882)
Additions (62,604) (83,589) (93,789)
Vessel acquisition (2,820) (693) (493)
Vessel impairment 137,255 159,834 212,399
Disposals     137
Write offs 76 8,859 295
Navios Containers deconsolidation   9,063  
Balance (460,774) (532,681) (626,155)
Net Book Value      
Property Plant And Equipment [Line Items]      
Balance 1,276,514 1,898,455 1,809,225
Vessels upon obtaining control     375,251
Additions (58,039) (71,961) (81,435)
Vessel acquisition 93,858 67,139 46,655
Vessel impairment (84,499) (114,233) (198,866)
Disposals     (19)
Disposals (87,823) (48,830) (101,717)
Write offs (472) (7,411) (34)
Transfers from deposits for vessels, port terminals and other fixed assets     49,421
Transfers to other long-term assets     (26)
Navios Containers deconsolidation   (446,645)  
Balance 1,139,539 1,276,514 1,898,455
Vessels | Cost      
Property Plant And Equipment [Line Items]      
Balance 1,021,351 1,324,766 1,814,965
Additions 1,277 4,747 398
Vessel acquisition 96,678 14,735 22,385
Vessel impairment (221,754) (274,067) (411,265)
Disposals (87,823) (48,830) (101,717)
Write offs (153)    
Balance 809,576 1,021,351 1,324,766
Vessels | Accumulated Depreciation      
Property Plant And Equipment [Line Items]      
Balance (280,004) (390,982) (536,518)
Additions (36,438) (48,812) (66,405)
Vessel acquisition (2,820) (44) (458)
Vessel impairment 137,255 159,834 212,399
Balance (182,007) (280,004) (390,982)
Vessels | Net Book Value      
Property Plant And Equipment [Line Items]      
Balance 741,347 933,784 1,278,447
Additions (35,161) (44,065) (66,007)
Vessel acquisition 93,858 14,691 21,927
Vessel impairment (84,499) (114,233) (198,866)
Disposals (87,823)    
Disposals   (48,830) (101,717)
Write offs (153)    
Balance 627,569 741,347 933,784
Port Terminals (Navios Logistics) | Cost      
Property Plant And Equipment [Line Items]      
Balance 253,962 253,360 251,641
Additions 869 602 2,530
Disposals     (156)
Write offs (87)    
Transfers from oil storage plant and port facilities for liquid cargoes     (629)
Transfers to other long-term assets     (26)
Balance 254,744 253,962 253,360
Port Terminals (Navios Logistics) | Accumulated Depreciation      
Property Plant And Equipment [Line Items]      
Balance (46,961) (39,775) (32,628)
Additions (7,216) (7,186) (7,284)
Disposals     137
Write offs 76    
Balance (54,101) (46,961) (39,775)
Port Terminals (Navios Logistics) | Net Book Value      
Property Plant And Equipment [Line Items]      
Balance 207,001 213,585 219,013
Additions (6,347) (6,584) (4,754)
Disposals     (19)
Write offs (11)    
Transfers from oil storage plant and port facilities for liquid cargoes     (629)
Transfers to other long-term assets     (26)
Balance 200,643 207,001 213,585
Tanker vessels, barges and pushboats (Navios Logistics) | Cost      
Property Plant And Equipment [Line Items]      
Balance 526,051 525,712 472,081
Additions 1,931 2,403 3,581
Write offs (308) (2,064)  
Transfers     629
Transfers from deposits for vessels, port terminals and other fixed assets     49,421
Balance 527,674 526,051 525,712
Tanker vessels, barges and pushboats (Navios Logistics) | Accumulated Depreciation      
Property Plant And Equipment [Line Items]      
Balance (200,756) (182,584) (164,056)
Additions (18,278) (19,038) (18,528)
Write offs   866  
Balance (219,034) (200,756) (182,584)
Tanker vessels, barges and pushboats (Navios Logistics) | Net Book Value      
Property Plant And Equipment [Line Items]      
Balance 325,295 343,128 308,025
Additions (16,347) (16,635) (14,947)
Write offs (308) (1,198)  
Transfers     629
Transfers from deposits for vessels, port terminals and other fixed assets     49,421
Balance 308,640 325,295 343,128
Containerships (Navios Containers) | Cost      
Property Plant And Equipment [Line Items]      
Balance 0 400,896 0
Vessels upon obtaining control     376,133
Additions   1,715  
Vessel acquisition   53,097 24,763
Navios Containers deconsolidation   (455,708)  
Balance 0 0 400,896
Containerships (Navios Containers) | Accumulated Depreciation      
Property Plant And Equipment [Line Items]      
Balance 0 (917) 0
Vessels upon obtaining control     (882)
Additions   (7,497)  
Vessel acquisition   (649) (35)
Navios Containers deconsolidation   9,063  
Balance 0 0 (917)
Containerships (Navios Containers) | Net Book Value      
Property Plant And Equipment [Line Items]      
Balance 0 399,979 0
Vessels upon obtaining control     375,251
Additions   (5,782)  
Vessel acquisition   52,448 24,728
Navios Containers deconsolidation   (446,645)  
Balance 0 0 399,979
Other fixed assets | Cost      
Property Plant And Equipment [Line Items]      
Balance 7,831 19,876 14,360
Additions 488 2,161 5,845
Write offs   (14,206) (329)
Balance 8,319 7,831 19,876
Other fixed assets | Accumulated Depreciation      
Property Plant And Equipment [Line Items]      
Balance (4,960) (11,897) (10,620)
Additions (672) (1,056) (1,572)
Write offs   7,993 295
Balance (5,632) (4,960) (11,897)
Other fixed assets | Net Book Value      
Property Plant And Equipment [Line Items]      
Balance 2,871 7,979 3,740
Additions   1,105 4,273
Additions (184)    
Write offs   (6,213) (34)
Balance $ 2,687 $ 2,871 $ 7,979