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Debt (Carrying Amounts Of Long-Term Debt) (Details) - USD ($)	Dec. 31, 2016	Nov. 30, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Debt Instrument [Line Items]
Long-term Debt, Excluding Current Maturities	$ 2,235,137,000					$ 1,040,040,000
Total	2,253,000,000
Long-term Debt and Capital Lease Obligations	2,235,137,000					1,040,040,000
HEP
Debt Instrument [Line Items]
Borrowings outstanding under revolving credit agreement	553,000,000		$ 1,200,000,000			712,000,000
Long-term Debt and Capital Lease Obligations	1,243,912,000					1,008,752,000
Five Point Eight Seven Five Percentage Senior Notes Due Two Thousand Twenty-Six [Member] [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage					5.875%
Senior Notes, Noncurrent	1,000,000,000	$ 750,000,000			$ 250,000,000
Debt Instrument, Unamortized Discount	(8,775,000)
Total	$ 991,225,000
6.875% Senior Notes Due 2018
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.875%			6.875%
Senior Notes, Noncurrent				$ 150,000,000
Holly Financing Obligation
Debt Instrument [Line Items]
Capital Lease Obligations	$ 0					31,288,000
Long-term Debt and Capital Lease Obligations	$ 991,225,000					31,288,000
Six Percent Senior Notes Due Two Thousand Twenty Four [Member] [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage					6.00%
Six Percent Senior Notes Due Two Thousand Twenty Four [Member] [Member] \| HEP
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.00%
Senior Notes, Noncurrent	$ 400,000,000		$ 400,000,000
Debt Instrument, Unamortized Discount	(6,607,000)
Total	$ 393,393,000
8.25% Senior Notes Due 2018 \| HEP
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	8.25%						8.25%
Senior Notes, Noncurrent							$ 150,000,000.0
6.5% Senior Notes Due 2020
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage					6.50%
6.5% Senior Notes Due 2020 \| HEP
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.50%
Long-term Debt, Excluding Current Maturities	$ 297,519,000					296,752,000
Senior Notes, Noncurrent	300,000,000					300,000,000
Debt Instrument, Unamortized Discount	$ (2,481,000)					$ (3,248,000)