Derivative Instruments and Hedging Activities (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Jun. 30, 2012
Derivative [Line Items]
Net unrealized gain on accumulated other comprehensive loss related to cash flow hedges	$ (23,300,000)
Net unrealized gain effectively transferred from accumulated other comprehensive loss hedging instruments	(11,700,000)
Gain (loss) on derivatives reclassified from accumulated OCI to income, period	12 months
Current Interest Rate Swap
Derivative [Line Items]
Number of derivative instruments	3
HEP
Derivative [Line Items]
Accumulated Other Comprehensive loss that relates to cash flow hedging instruments		4,300,000
Cash flow hedge to be amortized to interest expense within twelve months	800,000
HEP | Interest Rate Contract
Derivative [Line Items]
Fixed interest rate	0.74%
Rate added to fixed base rate	2.25%
Effective interest rate on debt	2.99%
HEP | Current Interest Rate Swap
Derivative [Line Items]
Fixed interest rate	0.99%
Effective interest rate on debt	3.24%
Holly Credit Agreement | HEP
Derivative [Line Items]
Credit agreement advance	305,000,000
February 2016 Maturity Date | HEP | Interest Rate Contract
Derivative [Line Items]
Credit agreement advance	155,000,000
July 2017 Maturity Date | HEP | Interest Rate Contract
Derivative [Line Items]
Credit agreement advance	$ 150,000,000