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Subsequent Event (Details) - Subsequent Events [Member] - Savage Inland Marine, LLC [Member] bbl in Millions | Apr. 01, 2020 USD ($) bbl TankBarge Towboat
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Acquisitions [Abstract] |
Cash paid for acquisition | $ | $ 277,931,000
Inland Tank Barges [Member] |
Acquisitions [Abstract] |
Number of maritime vessels acquired | TankBarge | 92
Aggregate tank barge barrel capacity (in barrels) | bbl | 2.6
Inland Towboats [Member] |
Acquisitions [Abstract] |
Number of maritime vessels acquired | Towboat | 46

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