Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.1
Investments, At Equity, And Advances To 50% Or Less Owned Companies (Narrative) (Details)
$ in Millions
3 Months Ended
Mar. 31, 2019
USD ($)
equipment
rail_ferry
Foreign-flag Harbor Tugs | KSM  
Schedule Of Equity Method Investments [Line Items]  
Number of equipment operated | rail_ferry 4
Equipment Subject to Operating Lease, Number of Units | rail_ferry 2
Foreign-flag Ocean Liquid Tank Barge | KSM  
Schedule Of Equity Method Investments [Line Items]  
Number of equipment operated | rail_ferry 1
Foreign-flag Specialty Vessel | KSM  
Schedule Of Equity Method Investments [Line Items]  
Number of equipment operated | rail_ferry 1
Time Chartered, 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 7
Bareboat Charter | KSM  
Schedule Of Equity Method Investments [Line Items]  
Revenue from Related Parties | $ $ 0.3
Time Charter | Trailer Bridge  
Schedule Of Equity Method Investments [Line Items]  
Revenue from Related Parties | $ 0.9
Time Charter | SCF Bunge Marine  
Schedule Of Equity Method Investments [Line Items]  
Revenue from Related Parties | $ 1.6
Rental Income | Bunge SCF Grain  
Schedule Of Equity Method Investments [Line Items]  
Revenue from Related Parties | $ $ 0.2