Derivative Instruments And Hedging Activities Interest Rate Swaps (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Derivative [Line Items]
Change in fair value	$ (2,095)	$ (1,511)	$ 2,620	$ (18,570)
(Gain) loss reclassified to earnings due to settlements	5,179	4,046	5,228	37,012
Interest expense	28,731	19,550	85,534	45,888
Gain (Loss) Recognized in Earnings due to Settlements	(5,449)	(4,316)	(6,038)	(37,822)
HEP [Member]
Derivative [Line Items]
Change in fair value	1	201	88	(737)
(Gain) loss reclassified to earnings due to settlements	(64)	95	(179)	438
Gain (Loss) Recognized in Earnings due to Settlements	(63)	296	(91)	(299)
Interest Expense [Member] \| HEP [Member]
Derivative [Line Items]
Gain (Loss) Recognized in Earnings due to Settlements	$ 64	$ (95)	$ 179	$ (438)

The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Subparagraph (b)
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- Definition

The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)
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Amount of the cost of borrowed funds accounted for as interest expense.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391

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-Name Accounting Standards Codification
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.9)
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