Derivative Instruments And Hedging Activities (Summary Of Balance Sheet Locations And Related Fair Values Of Outstanding Derivative Instruments) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Derivative [Line Items]
Purchase Price Canadian Dollars	$ 1,125,000
Derivative Asset Fair Value Net Asset	2,172	$ 9,484
Derivative Liability Fair Value Net Liability	13,986	32,580
Accrued Liabilities [Member]
Derivative [Line Items]
Derivative Liability Fair Value Net Liability	13,308	32,580
Prepayments And Other [Member]
Derivative [Line Items]
Derivative Asset Fair Value Net Asset	2,172	9,484
Other Noncurrent Liabilities [Member]
Derivative [Line Items]
Derivative Liability Fair Value Net Liability	678
Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	63	91
Derivative Asset Fair Value Gross Liability	0	0
Derivative Asset Fair Value Net Asset	63	91
Derivative Liability Fair Value Gross Liability	10,018	16,163
Derivative Liability Fair Value Gross Asset	0	(431)
Derivative Liability Fair Value Net Liability	10,018	15,732
Designated as Hedging Instrument [Member] | Commodity Contract [Member]
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	0	0
Derivative Asset Fair Value Gross Liability	0	0
Derivative Asset Fair Value Net Asset	0	0
Derivative Liability Fair Value Gross Liability	10,018	13,185
Derivative Liability Fair Value Gross Asset	0	(431)
Derivative Liability Fair Value Net Liability	10,018	12,754
Designated as Hedging Instrument [Member] | Forward Contracts [Member]
Derivative [Line Items]
Derivative Liability Fair Value Gross Liability		2,978
Derivative Liability Fair Value Gross Asset		0
Derivative Liability Fair Value Net Liability		2,978
Designated as Hedging Instrument [Member] | HEP Interest Rate Swap [Member]
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	63	91
Derivative Asset Fair Value Gross Liability	0	0
Derivative Asset Fair Value Net Asset	63	91
Derivative Liability Fair Value Gross Liability	0	0
Derivative Liability Fair Value Gross Asset	0	0
Derivative Liability Fair Value Net Liability	0	0
Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	2,109	10,149
Derivative Asset Fair Value Gross Liability	0	(756)
Derivative Asset Fair Value Net Asset	2,109	9,393
Derivative Liability Fair Value Gross Liability	11,831	26,735
Derivative Liability Fair Value Gross Asset	(7,863)	(9,887)
Derivative Liability Fair Value Net Liability	3,968	16,848
Not Designated as Hedging Instrument [Member] | Commodity Contract [Member]
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	0	4,244
Derivative Asset Fair Value Gross Liability	0	(756)
Derivative Asset Fair Value Net Asset	0	3,488
Derivative Liability Fair Value Gross Liability	10,613	12,903
Derivative Liability Fair Value Gross Asset	(7,863)	(9,887)
Derivative Liability Fair Value Net Liability	2,750	3,016
Not Designated as Hedging Instrument [Member] | Forward Contracts [Member]
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	1,447	5,905
Derivative Asset Fair Value Gross Liability	0
Derivative Asset Fair Value Net Asset	1,447	5,905
Derivative Liability Fair Value Gross Liability	1,218	5,338
Derivative Liability Fair Value Net Liability	1,218	5,338
Not Designated as Hedging Instrument [Member] | Nymex Futures Contracts [Member]
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	662	0
Derivative Asset Fair Value Gross Liability	0
Derivative Asset Fair Value Net Asset	662	0
Derivative Liability Fair Value Gross Liability	0	1,975
Derivative Liability Fair Value Net Liability	$ 0	1,975
Not Designated as Hedging Instrument [Member] | Foreign Exchange Future [Member]
Derivative [Line Items]
Derivative Liability Fair Value Gross Liability		6,519
Derivative Liability Fair Value Net Liability		$ 6,519