Segment Information - Summarized financial information (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Segment Reporting Information [Line Items]          
Revenue $ 143,624 $ 97,127 $ 260,575 $ 188,210  
Interest expense and finance cost, net (36,170) (31,418) (72,370) (63,061)  
Depreciation and amortization (15,988) (18,012) (32,254) (36,088)  
Equity in net earnings of affiliate companies 12,854 9,445 40,594 3,308  
Net income/ (loss) attributable to Navios Holdings common stockholders 24,936 (35,271) 25,099 (88,546)  
Total assets 1,829,093   1,829,093   $ 1,971,325
Goodwill 160,336   160,336   160,336
Investment in affiliate companies 97,351   97,351   56,988
Cash and cash equivalents 73,159   73,159   94,881
Restricted cash 10   10   $ 16,303
Long-term debt, net (including current and noncurrent portion) 1,500,066   1,500,066    
Dry Bulk Vessel Operations [Member]          
Segment Reporting Information [Line Items]          
Revenue 86,053 38,302 149,781 72,562  
Interest expense and finance cost, net (21,011) (22,159) (42,855) (44,529)  
Depreciation and amortization (7,917) (10,745) (16,714) (21,543)  
Equity in net earnings of affiliate companies 12,854 9,445 40,594 3,308  
Net income/ (loss) attributable to Navios Holdings common stockholders 27,795 (42,918) 27,694 (100,690)  
Total assets 1,156,441 1,500,046 1,156,441 1,500,046  
Goodwill 56,240 56,240 56,240 56,240  
Capital expenditures (22,758) (98,672) (24,152) (98,672)  
Investment in affiliate companies 97,351 63,498 97,351 63,498  
Cash and cash equivalents 25,689 20,525 25,689 20,525  
Restricted cash 10 1,058 10 1,058  
Long-term debt, net (including current and noncurrent portion) 927,399 1,082,032 927,399 1,082,032  
Logistics Business [Member]          
Segment Reporting Information [Line Items]          
Revenue 57,571 58,825 110,794 115,648  
Interest expense and finance cost, net (15,159) (9,259) (29,515) (18,532)  
Depreciation and amortization (8,071) (7,267) (15,540) (14,545)  
Equity in net earnings of affiliate companies 0 0 0 0  
Net income/ (loss) attributable to Navios Holdings common stockholders (2,859) 7,647 (2,595) 12,144  
Total assets 672,652 615,878 672,652 615,878  
Goodwill 104,096 104,096 104,096 104,096  
Capital expenditures (3,646) (2,578) (22,033) (2,578)  
Investment in affiliate companies 0 0 0 0  
Cash and cash equivalents 47,470 33,489 47,470 33,489  
Restricted cash 0 0 0 0  
Long-term debt, net (including current and noncurrent portion) 549,054 509,749 549,054 509,749  
Total [Member]          
Segment Reporting Information [Line Items]          
Revenue 143,624 97,127 260,575 188,210  
Interest expense and finance cost, net (36,170) (31,418) (72,370) (63,061)  
Depreciation and amortization (15,988) (18,012) (32,254) (36,088)  
Equity in net earnings of affiliate companies 12,854 9,445 40,594 3,308  
Net income/ (loss) attributable to Navios Holdings common stockholders 24,936 (35,271) 25,099 (88,546)  
Total assets 1,829,093 2,115,924 1,829,093 2,115,924  
Goodwill 160,336 160,336 160,336 160,336  
Capital expenditures (26,404) (101,250) (46,185) (101,250)  
Investment in affiliate companies 97,351 63,498 97,351 63,498  
Cash and cash equivalents 73,159 54,014 73,159 54,014  
Restricted cash 10 1,058 10 1,058  
Long-term debt, net (including current and noncurrent portion) $ 1,476,453 $ 1,591,781 $ 1,476,453 $ 1,591,781