Organization, Description of Business and Basis of Presentation (Narrative) (Details) $ in Thousands, bbl in Millions	3 Months Ended
	Mar. 31, 2020 USD ($) Terminal bbl mi	Mar. 31, 2019 USD ($)
Organization and Description of Business [Line Items]
Number Of Marine Terminals Sold	3
Number Of Marine Terminals Combined With Refined Product Segment	2
Number Of Marine Terminals Combined With Crude Oil Segment	1
Proceeds from sale and disposition of assets | $	$ 332,789	$ 53,676
Refined Products Segment [Member]
Organization and Description of Business [Line Items]
Pipeline Length | mi	9,800
Number of Pipeline Terminals	53
Number of Independent Terminals	25
Number of Marine Terminals	2
Number Of Marine Terminals, Owned Through Joint Venture	1
Crude Oil Pipeline and Terminals Segment [Member]
Organization and Description of Business [Line Items]
Pipeline Length | mi	2,200
Storage Capacity | bbl	37
Contracted Storage | bbl	25
Pipeline, Length - Wholly Owned | mi	1,000
Storage Capacity - Wholly Owned | bbl	30
Contracted Storage - Wholly Owned | bbl	22
Marine Terminals [Member]
Organization and Description of Business [Line Items]
Proceeds from sale and disposition of assets | $	$ 252,600
Asset Impairment Charges | $	$ 5,400