Annual report pursuant to Section 13 and 15(d)

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

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Investments, At Equity, And Advances To 50% Or Less Owned Companies (Narrative) (Details)
$ in Thousands
12 Months Ended
Apr. 30, 2018
USD ($)
Dec. 31, 2020
USD ($)
equipment
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Schedule of Equity Method Investments [Line Items]        
Retained earnings, undistributed earnings (losses) from equity method investees   $ 81,500 $ 69,800  
Proceeds from equity method investment, distribution   2,103 100 $ 5,907
Other significant noncash transaction, value of consideration received   0 589 0
Proceeds from sale of investment, at cost, in 50% or less owned companies   $ 0 0 78,015
Offshore tug - U.S.-flag        
Schedule of Equity Method Investments [Line Items]        
Equipment subject to operating lease, number of units | equipment   1    
Time Chartered, Inland River Towboats        
Schedule of Equity Method Investments [Line Items]        
Equipment subject to operating lease, number of units | equipment   8    
Trailer Bridge | Time Charter        
Schedule of Equity Method Investments [Line Items]        
Revenue from related parties   $ 3,700 4,000 3,500
Trailer Bridge | Offshore tug - U.S.-flag        
Schedule of Equity Method Investments [Line Items]        
Equipment subject to operating lease, number of units | equipment   1    
RF Vessel Holdings        
Schedule of Equity Method Investments [Line Items]        
Partners' capital account, contributions   $ 6,800 4,700 9,100
RF Vessel Holdings | Rail ferries - Foreign-flag        
Schedule of Equity Method Investments [Line Items]        
Number of equipment owned | equipment   2    
Number of equipment committed to purchase | equipment   2    
Golfo de Mexico        
Schedule of Equity Method Investments [Line Items]        
Partners' capital account, contributions   $ 1,000 500 4,600
Golfo de Mexico | Technical, Commercial, Administrative and Construction Management Services        
Schedule of Equity Method Investments [Line Items]        
Revenue from related parties   $ 1,900 1,800 1,100
Golfo de Mexico | Rail ferries - Foreign-flag        
Schedule of Equity Method Investments [Line Items]        
Number of equipment operated | equipment   2    
KSM        
Schedule of Equity Method Investments [Line Items]        
Partners' capital account, contributions       1,000
KSM | Technical, Commercial and Administrative Management Services        
Schedule of Equity Method Investments [Line Items]        
Revenue from related parties   $ 400 400 400
KSM | Bareboat Charter        
Schedule of Equity Method Investments [Line Items]        
Revenue from related parties   $ 1,700 1,400 1,300
KSM | Harbor tugs - Foreign-flag        
Schedule of Equity Method Investments [Line Items]        
Number of equipment operated | equipment   4    
Number of equipment chartered-out | equipment   2    
KSM | Specialty vessels - Foreign-flag        
Schedule of Equity Method Investments [Line Items]        
Number of equipment operated | equipment   2    
KSM | Ocean liquid tank barge - Foreign-flag        
Schedule of Equity Method Investments [Line Items]        
Number of equipment operated | equipment   1    
SCFCo        
Schedule of Equity Method Investments [Line Items]        
Proceeds from collection of advances and loans to affiliate       2,600
Advances and loans to affiliate   $ 38,600    
Equity method investment, difference between carrying amount and underlying equity   17,000    
SCFCo | Information Technology Services        
Schedule of Equity Method Investments [Line Items]        
Revenue from related parties   100 100 100
Bunge-SCF Grain        
Schedule of Equity Method Investments [Line Items]        
Advanced to joint ventures   7,000    
Bunge-SCF Grain | Rental Income        
Schedule of Equity Method Investments [Line Items]        
Revenue from related parties   700 700 900
Bunge-SCF Grain | Freight Transportation        
Schedule of Equity Method Investments [Line Items]        
Revenue from related parties   25,500 24,900 10,700
SCF Bunge Marine        
Schedule of Equity Method Investments [Line Items]        
Partners' capital account, contributions     300 500
Proceeds from equity method investment, distribution   1,300   4,600
SCF Bunge Marine | Time Charter        
Schedule of Equity Method Investments [Line Items]        
Revenue from related parties   7,900 6,800 3,300
SCF Bunge Marine | Towing Services        
Schedule of Equity Method Investments [Line Items]        
Related party transaction expense   $ 52,500 53,300 54,500
SCF Bunge Marine | Time Chartered, Inland River Towboats        
Schedule of Equity Method Investments [Line Items]        
Number of equipment chartered-out | equipment   8    
SCF Bunge Marine | Bareboat Chartered, Inland River Towboats        
Schedule of Equity Method Investments [Line Items]        
Number of equipment chartered-in | equipment   4    
Other Inland Services        
Schedule of Equity Method Investments [Line Items]        
Proceeds from equity method investment, distribution   $ 300    
Other Inland Services | Dividend Paid        
Schedule of Equity Method Investments [Line Items]        
Other significant noncash transaction, value of consideration received     600  
Other Inland Services | Specialty barge        
Schedule of Equity Method Investments [Line Items]        
Number of equipment acquired | equipment   1    
O’Brien’s do Brazil        
Schedule of Equity Method Investments [Line Items]        
Proceeds from equity method investment, distribution   $ 600 100 200
Hawker Pacific        
Schedule of Equity Method Investments [Line Items]        
Ownership percentage sold 34.20%      
Proceeds from sale of investment, at cost, in 50% or less owned companies $ 78,000      
Realized gain (loss) on disposal of equity method investments $ 53,900      
Hawker Pacific | Management Fees        
Schedule of Equity Method Investments [Line Items]        
Revenue from related parties       100
VA&E        
Schedule of Equity Method Investments [Line Items]        
Advances and loans to affiliate   8,400    
Advanced to joint ventures   $ 1,200    
Proceeds from equity method investment, distribution       400
Proceeds from equity method investment, distribution, return of capital     3,700  
Ownership of equity interest   23.80%    
Line of credit facility, maximum borrowing capacity   $ 3,500    
Proceeds from collection of advance to affiliate   (1,200)    
VA&E | Subordinated Debt        
Schedule of Equity Method Investments [Line Items]        
Proceeds from collection of advances and loans to affiliate   300    
Loans to affiliate   4,400    
Payments for advances and loans to affiliate     $ 500  
VA&E | Uncommitted Credit Facility        
Schedule of Equity Method Investments [Line Items]        
Proceeds from collection of advance to affiliate       (5,400)
Payments for advance to affiliate       5,400
Avion        
Schedule of Equity Method Investments [Line Items]        
Proceeds from equity method investment, distribution       800
Other        
Schedule of Equity Method Investments [Line Items]        
Advanced to joint ventures   $ 2,000    
Proceeds from equity method investment, distribution, return of capital       600
Proceeds from collection of advance to affiliate       $ (400)