Income Taxes (Tables)

12 Months Ended

Dec. 31, 2017

Income Tax Disclosure [Abstract]

Provision For Income Taxes

The provision for income taxes is comprised of the following:

	Years Ended December 31,
	2017			2016			2015
	(In thousands)
Current
Federal	$	102,786		$	(71,878	)	$	480,446
State	2,760			(7,304		)	71,750
Foreign	19,597			—			—
Deferred
Federal	(156,767		)	100,208			(127,714		)
State	28,527			(1,615		)	(18,422		)
Foreign	(9,282		)	—			—
	$	(12,379	)	$	19,411		$	406,060

Reconciliation Of Effective Tax Rate

The statutory federal income tax rate applied to pre-tax book income reconciles to income tax expense (benefit) as follows:

	Years Ended December 31,
	2017			2016			2015
	(In thousands)
Tax computed at statutory rate	$	304,102		$	(60,037	)	$	422,999
Effect of the Act	(307,101		)	—			—
State income taxes, net of federal tax benefit	21,343			(14,056		)	40,385
Domestic production activities deduction	(9,937		)	4,170			(35,200		)
Noncontrolling interest in net income	(29,357		)	(26,903		)	(24,155		)
Goodwill	—			119,722			—
Other	8,571			(3,485		)	2,031
	$	(12,379	)	$	19,411		$	406,060

Deferred Tax Assets And Liabilities

Our deferred income tax assets and liabilities as of December 31, 2017 and 2016 are as follows:

	December 31, 2017
	Assets		Liabilities			Total
	(In thousands)
Deferred income taxes
Properties, plants and equipment (due primarily to tax in excess of book depreciation)	$	—	$	(560,957	)	$	(560,957	)
Accrued employee benefits	14,685		—			14,685
Accrued post-retirement benefits	10,358		—			10,358
Accrued environmental costs	28,657		—			28,657
Hedging instruments	16		—			16
Inventory differences	—		(35,501		)	(35,501		)
Deferred turnaround costs	—		(58,645		)	(58,645		)
Net operating loss and tax credit carryforwards	21,682		—			21,682
Investment in HEP	—		(62,321		)	(62,321		)
Other	—		(5,759		)	(5,759		)
Total	$	75,398	$	(723,183	)	$	(647,785	)

	December 31, 2016
	Assets		Liabilities			Total
	(In thousands)
Deferred income taxes
Properties, plants and equipment (due primarily to tax in excess of book depreciation)	$	—	$	(618,053	)	$	(618,053	)
Accrued employee benefits	21,355		—			21,355
Accrued post-retirement benefits	10,024		—			10,024
Accrued environmental costs	41,152		—			41,152
Hedging instruments	7,396		—			7,396
Inventory differences	—		(8,341		)	(8,341		)
Deferred turnaround costs	—		(83,993		)	(83,993		)
Net operating loss and tax credit carryforwards	23,203		—			23,203
Investment in HEP	—		(27,276		)	(27,276		)
Other	14,119		—			14,119
Total	$	117,249	$	(737,663	)	$	(620,414	)

Summary of Positions for which Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Table Text Block]

A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:

	Years Ended December 31,
	2017		2016		2015
			(In thousands)
Balance at January 1	$	22,137	$	—	$	—
Additions based on tax positions related to the current year	31,615		22,137		—
Balance at December 31	$	53,752	$	22,137	$	—