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Acquisitions, 2018 (Details)
12 Months Ended
Dec. 31, 2021
USD ($)
Vessel
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Tankbarge
Acquisitions [Abstract]      
Purchase price $ 98,015,000 $ 148,185,000 $ 248,164,000
Cash paid for acquisition   81,635,000  
Fair values of assets acquired and liabilities assumed, net [Abstract]      
Goodwill 438,748,000 $ 657,800,000 953,826,000
Inland Tank Barges [Member]      
Acquisitions [Abstract]      
Purchase price     $ 17,991,000
Cash paid for acquisition $ 7,470,000    
Number of maritime vessels acquired 4   9
Average age of property   5 years