Revenue from Contract with Customers (Performance Obligations in Next 12 Months) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($)
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation	$ 2,368,040
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-04-01
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	12 months
Revenue, Remaining Performance Obligation	$ 597,905
Refined Products Segment [Member]
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation	1,345,763
Refined Products Segment [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-04-01
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation	237,444
Crude Oil Pipeline and Terminals Segment [Member]
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation	726,432
Crude Oil Pipeline and Terminals Segment [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-04-01
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation	224,078
Marine Storage Segment [Member]
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation	295,845
Marine Storage Segment [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-04-01
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation	$ 136,383
Minimum [Member] | Refined Products Segment [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-04-01
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Minimum [Member] | Crude Oil Pipeline and Terminals Segment [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-04-01
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Minimum [Member] | Marine Storage Segment [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-04-01
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Maximum [Member] | Refined Products Segment [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-04-01
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	20 years
Maximum [Member] | Crude Oil Pipeline and Terminals Segment [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-04-01
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	8 years
Maximum [Member] | Marine Storage Segment [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-04-01
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	6 years