Derivative Instruments and Hedging Activities Interest Rate Swaps (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Derivative [Line Items]
Change in fair value	$ (7,614)	$ (252,817)	$ 171,252
Amortization of unrealized loss attributable to discontinued cash flow hedges	1,749	5,095	41
Loss Recognized in Earnings Due to Settlements, Reclassified to interest expense	68,050	104,186	78,323
HEP
Derivative [Line Items]
Change in fair value	1,194	(4,418)	(1,956)
Loss reclassified to earnings due to settlements	2,092	1,508	5,477
Amortization of unrealized loss attributable to discontinued cash flow hedges	849	5,095	41
Total Unrealized Gain (Loss) Recognized in OCI	4,135	2,185	3,562
Loss Recognized in Earnings Due to Settlements, Reclassified to interest expense	$ (2,941)	$ (6,603)	$ (5,518)