Revenue from Contract with Customers (Performance Obligations in Next 12 Months) (Details) $ in Thousands	Jun. 30, 2019 USD ($)
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 3,518,351
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-07-01
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 718,710
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	12 months
Refined Products Segment [Member]
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 2,052,375
Refined Products Segment [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-07-01
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Amount	273,714
Crude Oil Pipeline and Terminals Segment [Member]
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Amount	1,244,128
Crude Oil Pipeline and Terminals Segment [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-07-01
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Amount	330,830
Marine Storage Segment [Member]
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Amount	221,848
Marine Storage Segment [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-07-01
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 114,166
Minimum [Member] | Refined Products Segment [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-07-01
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]: 2019-07-01
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]: 2019-07-01
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]: 2019-07-01
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	19 years
Maximum [Member] | Crude Oil Pipeline and Terminals Segment [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-07-01
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	10 years
Maximum [Member] | Marine Storage Segment [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-07-01
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	5 years