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 ($)
Sep. 01, 2017
USD ($)
Jul. 03, 2017
equipment
Dec. 31, 2019
USD ($)
equipment
Dec. 31, 2018
USD ($)
equipment
Dec. 31, 2017
USD ($)
equipment
Schedule of Equity Method Investments [Line Items]            
Retained earnings, undistributed earnings (losses) from equity method investees       $ 69,800 $ 65,000  
Proceeds on sale of a controlling interest in a subsidiary       0 0 $ 5,000
Proceeds from equity method investment, distribution       100 5,907 12,891
Other significant noncash transaction, value of consideration received       589 0 0
Proceeds from sale of equity method investments       0 78,015 0
Trailer Bridge            
Schedule of Equity Method Investments [Line Items]            
Payments for advance to affiliate           2,000
Proceeds from collection of advance to affiliate           6,000
RF Vessel Holdings            
Schedule of Equity Method Investments [Line Items]            
Ownership percentage sold   50.00%        
Proceeds on sale of a controlling interest in a subsidiary   $ 1,900        
Ownership of equity interest   50.00%        
Partners' capital account, contributions       4,700 9,100  
Golfo de Mexico            
Schedule of Equity Method Investments [Line Items]            
Ownership percentage sold   50.00%        
Proceeds on sale of a controlling interest in a subsidiary   $ 3,100        
Ownership of equity interest   50.00%        
Partners' capital account, contributions       500 4,600  
Proceeds from equity method investment, distribution           300
KSM            
Schedule of Equity Method Investments [Line Items]            
Partners' capital account, contributions         1,000 300
SeaJon            
Schedule of Equity Method Investments [Line Items]            
Proceeds from equity method investment, distribution           12,500
Proceeds from equity method investment, distribution, return of capital           3,500
SCFCo            
Schedule of Equity Method Investments [Line Items]            
Partners' capital account, contributions           400
Payments for advances and loans to affiliate           2,500
Proceeds from collection of advances and loans to affiliate         2,600 1,700
Advances and loans to affiliate       34,300    
Equity method investment, difference between carrying amount and underlying equity       20,200    
Bunge-SCF Grain            
Schedule of Equity Method Investments [Line Items]            
Advanced to joint ventures       7,000    
SCF Bunge Marine            
Schedule of Equity Method Investments [Line Items]            
Partners' capital account, contributions       300 500  
Proceeds from equity method investment, distribution         4,600 100
Other Inland Services | Dividend Paid            
Schedule of Equity Method Investments [Line Items]            
Other significant noncash transaction, value of consideration received       600    
O’Brien’s do Brazil            
Schedule of Equity Method Investments [Line Items]            
Proceeds from equity method investment, distribution       $ 100 200 100
Hawker Pacific            
Schedule of Equity Method Investments [Line Items]            
Ownership percentage sold 34.20%          
Proceeds from sale of equity method investments $ 78,000          
Realized gain (loss) on disposal of equity method investments $ 53,900          
VA&E            
Schedule of Equity Method Investments [Line Items]            
Ownership of equity interest       23.80%    
Proceeds from equity method investment, distribution         400  
Proceeds from equity method investment, distribution, return of capital       $ 3,700    
Advances and loans to affiliate       8,300    
Line of credit facility, maximum borrowing capacity       3,500    
Avion            
Schedule of Equity Method Investments [Line Items]            
Payments for advance to affiliate           1,000
Proceeds from collection of advance to affiliate           4,000
Proceeds from equity method investment, distribution         800  
Other            
Schedule of Equity Method Investments [Line Items]            
Proceeds from collection of advance to affiliate         400 400
Proceeds from equity method investment, distribution, return of capital         600  
Advanced to joint ventures       2,000    
Subordinated Debt | VA&E            
Schedule of Equity Method Investments [Line Items]            
Payments for advances and loans to affiliate       500    
Loans to affiliate       4,400    
Uncommitted Credit Facility | VA&E            
Schedule of Equity Method Investments [Line Items]            
Payments for advance to affiliate         5,400 3,500
Proceeds from collection of advance to affiliate         5,400  
Time Charter | Trailer Bridge            
Schedule of Equity Method Investments [Line Items]            
Revenue from related parties       4,000 3,500 3,100
Time Charter | SCF Bunge Marine            
Schedule of Equity Method Investments [Line Items]            
Revenue from related parties       6,800 3,300 2,100
Technical, Commercial, Administrative and Construction Management Services | Golfo de Mexico            
Schedule of Equity Method Investments [Line Items]            
Revenue from related parties       1,800 1,100 300
Technical, Commercial and Administrative Management Services | KSM            
Schedule of Equity Method Investments [Line Items]            
Revenue from related parties       400 400 300
Bareboat Charter | KSM            
Schedule of Equity Method Investments [Line Items]            
Revenue from related parties       1,400 1,300 1,100
Information Technology Services | SCFCo            
Schedule of Equity Method Investments [Line Items]            
Revenue from related parties       100 100 100
Rental Income | Bunge-SCF Grain            
Schedule of Equity Method Investments [Line Items]            
Revenue from related parties       700 900 1,100
Freight Transportation | Bunge-SCF Grain            
Schedule of Equity Method Investments [Line Items]            
Revenue from related parties       24,900 10,700 7,200
Towing Services | SCF Bunge Marine            
Schedule of Equity Method Investments [Line Items]            
Related party transaction expense       $ 53,300 54,500 41,400
Management Fees | Hawker Pacific            
Schedule of Equity Method Investments [Line Items]            
Revenue from related parties         $ 100 $ 300
Offshore tug - U.S.-flag | Trailer Bridge            
Schedule of Equity Method Investments [Line Items]            
Equipment subject to operating lease, number of units | equipment       1    
Rail ferries - Foreign-flag | RF Vessel Holdings            
Schedule of Equity Method Investments [Line Items]            
Number of equipment committed to purchase | equipment       2    
Harbor tugs - Foreign-flag            
Schedule of Equity Method Investments [Line Items]            
Number of equipment acquired | equipment       0 0 2
Harbor tugs - Foreign-flag | KSM            
Schedule of Equity Method Investments [Line Items]            
Number of equipment operated | equipment       4    
Number of equipment chartered-out | equipment       2    
Specialty vessel - Foreign-flag | KSM            
Schedule of Equity Method Investments [Line Items]            
Number of equipment operated | equipment       2    
Ocean liquid tank barge - Foreign-flag | KSM            
Schedule of Equity Method Investments [Line Items]            
Number of equipment operated | equipment       1    
Time Chartered, Inland River Towboats            
Schedule of Equity Method Investments [Line Items]            
Equipment subject to operating lease, number of units | equipment       8    
Time Chartered, Inland River Towboats | SCF Bunge Marine            
Schedule of Equity Method Investments [Line Items]            
Number of equipment chartered-out | equipment       8    
Bareboat Chartered, Inland River Towboats | SCF Bunge Marine            
Schedule of Equity Method Investments [Line Items]            
Number of equipment chartered-in | equipment       4    
Specialty barge | Other Inland Services            
Schedule of Equity Method Investments [Line Items]            
Number of equipment acquired | equipment       1    
RF Vessel Holdings            
Schedule of Equity Method Investments [Line Items]            
Business acquisition, percentage of voting interests acquired     100.00%      
RF Vessel Holdings | Rail ferries - Foreign-flag            
Schedule of Equity Method Investments [Line Items]            
Number of equipment acquired | equipment     2      
Golfo de Mexico            
Schedule of Equity Method Investments [Line Items]            
Business acquisition, percentage of voting interests acquired     100.00%      
Golfo de Mexico | Rail ferries - Foreign-flag            
Schedule of Equity Method Investments [Line Items]            
Number of equipment acquired | equipment     2