Organization, Description of Business and Basis of Presentation (Narrative) (Details) bbl in Millions	Mar. 31, 2016 Terminal bbl mi
Refined Products [Member]
Organization and Description of Business [Line Items]
Number of Pipeline Terminals | Terminal	54
Number of Independent Terminals | Terminal	26
Refined Products [Member] | Refined Products Transportation Services [Member]
Organization and Description of Business [Line Items]
Pipeline Length | mi	9,700
Refined Products [Member] | Ammonia Transportation Services [Member]
Organization and Description of Business [Line Items]
Pipeline Length | mi	1,100
Crude Oil Pipeline and Terminals [Member]
Organization and Description of Business [Line Items]
Pipeline Length | mi	1,600
Storage Capacity | bbl	22
Leasable Storage Capacity | bbl	14
Marine Storage [Member]
Organization and Description of Business [Line Items]
Number of Independent Terminals | Terminal	5
Storage Capacity | bbl	26