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Subsequent Events (Details) - Subsequent Event [Member] - USD ($)
$ in Millions
Nov. 03, 2017
Oct. 11, 2017
m/v Bulk Pride [Member]    
Subsequent Event [Line Items]    
Vessel Purchase Price   $ 13.8
Venture Barge Corp. [Member]    
Subsequent Event [Line Items]    
Vessel Purchase Price $ 2.4  
Equity Method Investment, Ownership Percentage 50.00%