Income Taxes (Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred Income Taxes Assets Liabilities [Line Items]
Deferred tax assets, gross	$ 67,516	$ 76,753
Deferred tax liabilities, gross	(790,092)	(724,538)
Deferred taxes, net	(722,576)	(647,785)
Property, Plant and Equipment [Member]
Deferred Income Taxes Assets Liabilities [Line Items]
Deferred tax liabilities, noncurrent	(577,133)	(560,957)
Accrued employee benefits
Deferred Income Taxes Assets Liabilities [Line Items]
Deferred tax assets, noncurrent	15,395	14,685
Postretirement Benefit Costs [Member]
Deferred Income Taxes Assets Liabilities [Line Items]
Deferred tax assets, noncurrent	8,482	10,358
SEC Schedule, 12-09, Reserve, Environmental Cost [Member]
Deferred Income Taxes Assets Liabilities [Line Items]
Deferred tax assets, noncurrent	29,937	28,657
Deferred Tax Liability Derivatives [Member]
Deferred Income Taxes Assets Liabilities [Line Items]
Deferred tax assets, noncurrent		16
Deferred Tax Asset, Derivatives [Domain]
Deferred Income Taxes Assets Liabilities [Line Items]
Deferred tax assets, noncurrent		16
Deferred tax liabilities, noncurrent	(4,099)
SEC Schedule, 12-09, Reserve, Inventory [Member]
Deferred Income Taxes Assets Liabilities [Line Items]
Deferred tax liabilities, noncurrent	(22,518)	(35,501)
Deferred turnaround costs
Deferred Income Taxes Assets Liabilities [Line Items]
Deferred tax liabilities, noncurrent	(87,360)	(58,645)
Net operating loss and tax credit carryforward [Member]
Deferred Income Taxes Assets Liabilities [Line Items]
Deferred tax assets, noncurrent	13,702	23,037
Deferred tax liabilities, noncurrent	(3,100)	(588)
HEP
Deferred Income Taxes Assets Liabilities [Line Items]
Deferred tax liabilities, noncurrent	(94,587)	(62,321)
Other
Deferred Income Taxes Assets Liabilities [Line Items]
Deferred tax liabilities, noncurrent	$ (1,295)	$ (6,526)