Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation and Accounting Policies - Property and Equipment (Details)

v3.19.3
Basis of Presentation and Accounting Policies - Property and Equipment (Details)
$ in Millions
9 Months Ended
Sep. 30, 2019
USD ($)
Property, Plant and Equipment [Line Items]  
Construction in progress $ 20.9
Capitalized Interest $ 0.1
Petroleum and chemical carriers - U.S.-flag  
Property, Plant and Equipment [Line Items]  
Useful life 25 years
Bulk carriers - U.S.-flag  
Property, Plant and Equipment [Line Items]  
Useful life 25 years
Harbor and Offshore Tugs [Member]  
Property, Plant and Equipment [Line Items]  
Useful life 25 years
Ocean Liquid Tank Barges - U.S.-flag  
Property, Plant and Equipment [Line Items]  
Useful life 25 years
Short-sea container/RORO vessels  
Property, Plant and Equipment [Line Items]  
Useful life 20 years
Inland river dry-cargo and specialty barges  
Property, Plant and Equipment [Line Items]  
Useful life 20 years
Inland river liquid tank barges  
Property, Plant and Equipment [Line Items]  
Useful life 25 years
Inland river towboats and harbor boats  
Property, Plant and Equipment [Line Items]  
Useful life 25 years
Terminal and fleeting facilities  
Property, Plant and Equipment [Line Items]  
Useful life 20 years