Related Party Transactions - Narrative (Details)	3 Months Ended			6 Months Ended
	Jun. 30, 2020 USD ($) yr shares	Dec. 31, 2019 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) yr shares	Jun. 30, 2019 USD ($)
Related Party Transaction [Line Items]
Sales-type Lease, Revenue			$ 0		$ 0
Concentration Risk, Percentage				83.00%
Document Period End Date				Jun. 30, 2020
Shares, Issued | shares	37,250,000			37,250,000
Administrative fee, related party				$ 2,600,000
Revenue from related parties	$ 95,600,000		102,400,000	197,000,000.0	205,700,000
Omnibus Agreement G & A expenses, related party	700,000		600,000		1,300,000
Employee expenses reimbursed to related party			13,200,000	27,300,000	26,800,000
Reimbursements received from related parties	900,000		3,600,000	4,000,000.0	5,800,000
Accounts receivable due from HFC	49,800,000	$ 49,700,000		49,800,000
Due to Affiliate	7,300,000	16,700,000		7,300,000
Lease Income	500,000			1,000,000.0
Sales-type Lease, Lease Income	2,400,000			4,800,000
Limited Partners' Capital Account, Distribution Amount				2,500,000
Affiliated Entity
Related Party Transaction [Line Items]
Minimum annualized payments	351,100,000			351,100,000
Distributions to HEP unitholders	$ 18,400,000		37,500,000	56,000,000.0	74,800,000
Shortfall Payments
Related Party Transaction [Line Items]
Shortfall billings deferred revenue		$ 500,000	$ 0	$ 300,000	$ 700,000
Minimum
Related Party Transaction [Line Items]
Revenue service commitments expiration | yr	2,021			2,021
Maximum
Related Party Transaction [Line Items]
Revenue service commitments expiration | yr	2,036			2,036