Annual report pursuant to Section 13 and 15(d)

Investments, At Equity, And Advances To 50% Or Less Owned Companies (Summary of Investments) (Details)

v3.20.4
Investments, At Equity, And Advances To 50% Or Less Owned Companies (Summary of Investments) (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]    
Equity method investments $ 155,399 $ 157,108
VA&E    
Schedule of Equity Method Investments [Line Items]    
Ownership of equity interest 23.80%  
Ocean Services    
Schedule of Equity Method Investments [Line Items]    
Equity method investments $ 82,187 78,049
Ocean Services | Trailer Bridge    
Schedule of Equity Method Investments [Line Items]    
Ownership of equity interest 55.30%  
Equity method investments $ 54,740 56,770
Ocean Services | RF Vessel Holdings    
Schedule of Equity Method Investments [Line Items]    
Ownership of equity interest 50.00%  
Equity method investments $ 21,946 15,878
Ocean Services | Golfo de Mexico    
Schedule of Equity Method Investments [Line Items]    
Ownership of equity interest 50.00%  
Equity method investments $ 2,888 3,485
Ocean Services | KSM    
Schedule of Equity Method Investments [Line Items]    
Ownership of equity interest 50.00%  
Equity method investments $ 2,613 1,916
Inland Services    
Schedule of Equity Method Investments [Line Items]    
Equity method investments $ 50,315 55,092
Inland Services | SCFCo    
Schedule of Equity Method Investments [Line Items]    
Ownership of equity interest 50.00%  
Equity method investments $ 29,448 33,705
Inland Services | Bunge-SCF Grain    
Schedule of Equity Method Investments [Line Items]    
Ownership of equity interest 50.00%  
Equity method investments $ 14,098 15,112
Inland Services | SCF Bunge Marine    
Schedule of Equity Method Investments [Line Items]    
Ownership of equity interest 62.50%  
Equity method investments $ 4,797 3,990
Inland Services | Other Inland Services    
Schedule of Equity Method Investments [Line Items]    
Ownership of equity interest 50.00%  
Equity method investments $ 1,972 2,285
Witt O'Brien's LLC | O’Brien’s do Brazil    
Schedule of Equity Method Investments [Line Items]    
Ownership of equity interest 50.00%  
Equity method investments $ 1,247 1,274
Other    
Schedule of Equity Method Investments [Line Items]    
Equity method investments $ 21,650 22,693
Other | VA&E    
Schedule of Equity Method Investments [Line Items]    
Ownership of equity interest 23.80%  
Equity method investments $ 9,814 10,448
Other | Avion    
Schedule of Equity Method Investments [Line Items]    
Ownership of equity interest 39.10%  
Equity method investments $ 10,310 10,706
Other | Other    
Schedule of Equity Method Investments [Line Items]    
Equity method investments $ 1,526 $ 1,539
Other | Other | Minimum    
Schedule of Equity Method Investments [Line Items]    
Ownership of equity interest 40.00%  
Other | Other | Maximum    
Schedule of Equity Method Investments [Line Items]    
Ownership of equity interest 47.50%