Revenues from Contracts with Customers - HEP Future Performance Obligations (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Feb. 01, 2019	Dec. 31, 2018
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Contract with Customer, Liability	$ 4,502	$ 6,463	$ 132
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Refined product sales volumes, performance obligations expected to be satisfied	$ 15,173
Refined product sales volumes, performance obligations expected to be satisfied, expected timing	9 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Refined product sales volumes, performance obligations expected to be satisfied	$ 7,456
Refined product sales volumes, 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]
Refined product sales volumes, performance obligations expected to be satisfied	$ 1,847
Refined product sales volumes, performance obligations expected to be satisfied, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Refined product sales volumes, performance obligations expected to be satisfied	$ 0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Refined product sales volumes, performance obligations expected to be satisfied	$ 24,476