Annual report pursuant to Section 13 and 15(d)

Related Party Transactions (Details)

v3.19.3.a.u2
Related Party Transactions (Details) - Affiliated Entity - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dry-Cargo Barge Pools Management      
Related Party Transaction [Line Items]      
Related party transaction, amounts $ 0.5 $ 0.9 $ 0.6
Revenue from related parties 0.1 0.1 0.1
Payables to related parties 0.1 0.5  
SEACOR Marine Holdings Inc. | Transition Services      
Related Party Transaction [Line Items]      
Revenue from related parties $ 0.6 $ 4.6 $ 3.5