Revenues from Contracts with Customers - HEP Third-Party Customer Minimum Revenues (Details) $ in Thousands	6 Months Ended
	Jun. 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	$ 14,255
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	$ 21,109
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]: 2019-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
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, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
HEP contractual minimum revenues, performance obligations expected to be satisfied	$ 19,767
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-04-01 | Third-Party Customer
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
HEP contractual minimum revenues, performance obligations expected to be satisfied	$ 41,608
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, 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, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
HEP contractual minimum revenues, performance obligations expected to be satisfied	$ 531
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-04-01 | Third-Party Customer
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
HEP contractual minimum revenues, performance obligations expected to be satisfied	$ 17,828
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, 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, expected timing
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
HEP contractual minimum revenues, performance obligations expected to be satisfied	$ 0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01 | Third-Party Customer
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
HEP contractual minimum revenues, performance obligations expected to be satisfied	12,552
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	34,553
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	$ 93,097