Revenues from Contracts with Customers - HEP Third-Party Customer Minimum Revenues (Details) $ in Thousands	Sep. 30, 2018 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
HEP contractual minimum revenues, performance obligations expected to be satisfied, expected timing	6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-07-01 | Third-Party Customer
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
HEP contractual minimum revenues, performance obligations expected to be satisfied, expected timing	6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
HEP contractual minimum revenues, performance obligations expected to be satisfied	$ 6,546
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-10-01 | Third-Party Customer
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
HEP contractual minimum revenues, performance obligations expected to be satisfied	10,437
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
HEP contractual minimum revenues, performance obligations expected to be satisfied	$ 20,013
HEP contractual minimum revenues, performance obligations expected to be satisfied, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01 | Third-Party Customer
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
HEP contractual minimum revenues, performance obligations expected to be satisfied	$ 41,863
HEP contractual minimum revenues, performance obligations expected to be satisfied, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
HEP contractual minimum revenues, performance obligations expected to be satisfied	$ 777
HEP contractual minimum revenues, performance obligations expected to be satisfied, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01 | Third-Party Customer
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
HEP contractual minimum revenues, performance obligations expected to be satisfied	$ 18,040
HEP contractual minimum revenues, performance obligations expected to be satisfied, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
HEP contractual minimum revenues, performance obligations expected to be satisfied	$ 164
HEP contractual minimum revenues, performance obligations expected to be satisfied, expected timing
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01 | Third-Party Customer
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
HEP contractual minimum revenues, performance obligations expected to be satisfied	$ 12,553
HEP contractual minimum revenues, performance obligations expected to be satisfied, expected timing
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
HEP contractual minimum revenues, performance obligations expected to be satisfied	$ 27,500
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil) | Third-Party Customer
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
HEP contractual minimum revenues, performance obligations expected to be satisfied	$ 82,893