Related Party Transactions (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015		Sep. 30, 2016	Sep. 30, 2015
Related Party Transaction [Line Items]
Administrative Fee, Related Party							$ 2,500
Revenue from related parties		$ 77,398			$ 73,716	[1]	239,423	$ 214,268	[1]
Omnibus Agreement G & A Expenses, Related Party		600					1,800
Employee expenses reimbursed to related party		10,000			8,500		29,400	24,700
Reimbursements received from related parties		4,500			3,000		11,200	10,000
Accounts receivable due from HFC		29,500		$ 32,500			29,500
Accounts payable to HFC		5,878		11,635			5,878
Payments to Acquire Other Productive Assets							39,500
Affiliated Entity [Member]
Related Party Transaction [Line Items]
Other Commitments, Future Minimum Payments, Remainder of Fiscal Year		321,100					321,100
Distributions to HEP unitholders		$ 26,200			$ 22,900		76,000	66,800
Shortfall Payments [Member]
Related Party Transaction [Line Items]
Shortfall Payments, Revenue Recognized							5,700	$ 6,600
Shortfall Billings Deferred Revenue				$ 6,400			$ 4,600
Osage Pipeline [Member] [Member]
Related Party Transaction [Line Items]
Equity Method Investment, Ownership Percentage			50.00%
Tulsa Tanks [Member]
Related Party Transaction [Line Items]
Tulsa tanks, Plains acquisition			$ 39,500
Subsequent Event [Member]
Related Party Transaction [Line Items]
Payments to Acquire Other Productive Assets	$ 278,000

[1] Retrospectively adjusted as described in Note 1.