Quarterly report pursuant to Section 13 or 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)
9 Months Ended
Sep. 30, 2019
USD ($)
Vessel
Inland River Towboats  
Schedule Of Equity Method Investments [Line Items]  
Equipment Subject to Operating Lease, Number of Units | Vessel 4
Trailer Bridge | U.S.-flag Offshore Tug  
Schedule Of Equity Method Investments [Line Items]  
Equipment Subject to Operating Lease, Number of Units | Vessel 1
RF Vessel Holdings  
Schedule Of Equity Method Investments [Line Items]  
Partners' Capital Account, Contributions $ 2,700,000
RF Vessel Holdings | Foreign-flag Rail Ferries  
Schedule Of Equity Method Investments [Line Items]  
Number of equipment operated | Vessel 2
KSM | Foreign-flag Harbor Tugs  
Schedule Of Equity Method Investments [Line Items]  
Equipment Subject to Operating Lease, Number of Units | Vessel 2
Number of equipment operated | Vessel 4
KSM | Foreign-flag Ocean Liquid Tank Barge  
Schedule Of Equity Method Investments [Line Items]  
Number of equipment operated | Vessel 1
KSM | Foreign-flag Specialty Vessel  
Schedule Of Equity Method Investments [Line Items]  
Number of equipment operated | Vessel 2
SCF Bunge Marine | Inland River Towboats  
Schedule Of Equity Method Investments [Line Items]  
Equipment Subject to Operating Lease, Number of Units | Vessel 7
Other Inland Services Equity Method Investments | Dividend Paid  
Schedule Of Equity Method Investments [Line Items]  
Other Significant Noncash Transaction, Value of Consideration Received $ 600,000
Other Inland Services Equity Method Investments | Specialty Barge  
Schedule Of Equity Method Investments [Line Items]  
Number of Equipment Acquired 1
VA&E  
Schedule Of Equity Method Investments [Line Items]  
Proceeds from Equity Method Investment, Distribution, Return of Capital $ 3,700,000
Equity Method Investment, Ownership Percentage 23.80%
Advances and Loans to Affiliate $ 8,100,000
VA&E | Subordinated Debt  
Schedule Of Equity Method Investments [Line Items]  
Payments for Advances and Loans to Affiliate 500,000
Time Charter | Trailer Bridge  
Schedule Of Equity Method Investments [Line Items]  
Revenue from Related Parties 3,000,000.0
Time Charter | SCF Bunge Marine  
Schedule Of Equity Method Investments [Line Items]  
Revenue from Related Parties 4,900,000
Bareboat Charter | KSM  
Schedule Of Equity Method Investments [Line Items]  
Revenue from Related Parties 1,000,000.0
Rental Income | Bunge SCF Grain  
Schedule Of Equity Method Investments [Line Items]  
Revenue from Related Parties $ 500,000