Income Taxes (Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deferred Income Taxes Assets Liabilities [Line Items]
Deferred tax assets, gross	$ 75,398	$ 117,249
Deferred tax liabilities, gross	(723,183)	(737,663)
Deferred taxes, net	(647,785)	(620,414)
Property, Plant and Equipment [Member]
Deferred Income Taxes Assets Liabilities [Line Items]
Deferred tax liabilities, noncurrent	(560,957)	(618,053)
Accrued employee benefits
Deferred Income Taxes Assets Liabilities [Line Items]
Deferred tax assets, noncurrent	14,685	21,355
Postretirement Benefit Costs [Member]
Deferred Income Taxes Assets Liabilities [Line Items]
Deferred tax assets, noncurrent	10,358	10,024
Reserve for Environmental Costs [Member]
Deferred Income Taxes Assets Liabilities [Line Items]
Deferred tax assets, noncurrent	28,657	41,152
Deferred Tax Liability Derivatives [Member]
Deferred Income Taxes Assets Liabilities [Line Items]
Deferred tax assets, noncurrent		7,396
Deferred Tax Asset, Derivatives [Domain]
Deferred Income Taxes Assets Liabilities [Line Items]
Deferred tax assets, noncurrent	16	7,396
Inventory Valuation Reserve [Member]
Deferred Income Taxes Assets Liabilities [Line Items]
Deferred tax assets, noncurrent		0
Deferred tax liabilities, noncurrent	(35,501)	(8,341)
Deferred turnaround costs
Deferred Income Taxes Assets Liabilities [Line Items]
Deferred tax liabilities, noncurrent	(58,645)	(83,993)
Net operating loss and tax credit carryforward [Member]
Deferred Income Taxes Assets Liabilities [Line Items]
Deferred tax assets, noncurrent	21,682	23,203
HEP
Deferred Income Taxes Assets Liabilities [Line Items]
Deferred tax liabilities, noncurrent	(62,321)	(27,276)
Other
Deferred Income Taxes Assets Liabilities [Line Items]
Deferred tax assets, noncurrent	0	$ 14,119
Deferred tax liabilities, noncurrent	$ (5,759)