Income Taxes (Tables)

12 Months Ended

Dec. 31, 2015

The provision for income taxes is comprised of the following:

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



	Years Ended December 31,
	2015			2014			2013
	(In thousands)
Tax computed at statutory rate	$	422,999		$	163,625		$	405,790
State income taxes, net of federal tax benefit	40,385			13,641			21,363
Domestic production activities deduction	(35,200		)	(20,998		)	(22,101		)
Noncontrolling interest in net income	(24,155		)	(17,431		)	(12,378		)
Uncertain tax positions	—			—			(193		)
Other	2,031			2,335			(905		)
	$	406,060		$	141,172		$	391,576

Our deferred income tax assets and liabilities as of December 31, 2015 and 2014 are as follows:



	December 31, 2015
	Assets		Liabilities			Total
	(In thousands)
Deferred income taxes
Properties, plants and equipment (due primarily to tax in excess of book depreciation)	$	—	$	(648,542	)	$	(648,542	)
Accrued employee benefits	22,355		—			22,355
Accrued post-retirement benefits	11,518		—			11,518
Accrued environmental costs	42,517		—			42,517
Hedging instruments	21,815		—			21,815
Inventory differences	175,614		—			175,614
Deferred turnaround costs	—		(104,944		)	(104,944		)
Net operating loss and tax credit carryforwards	8,033		—			8,033
Investment in HEP	—		(23,429		)	(23,429		)
Other	—		(2,843		)	(2,843		)
Total	$	281,852	$	(779,758	)	$	(497,906	)



	December 31, 2014
	Assets		Liabilities			Total
	(In thousands)
Deferred income taxes
Properties, plants and equipment (due primarily to tax in excess of book depreciation)	$	—	$	(581,017	)	$	(581,017	)
Accrued employee benefits	22,973		—			22,973
Accrued post-retirement benefits	11,504		—			11,504
Accrued environmental costs	30,744		—			30,744
Hedging instruments	—		(11,601		)	(11,601		)
Inventory differences	—		(7,376		)	(7,376		)
Deferred turnaround costs	—		(110,827		)	(110,827		)
Net operating loss and tax credit carryforwards	10,119		—			10,119
Investment in HEP	—		(25,244		)	(25,244		)
Other	—		(3,554		)	(3,554		)
Total	$	75,340	$	(739,619	)	$	(664,279	)

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



	Years Ended December 31,
	2014			2013
	(In thousands)
Balance at January 1	$	9,006		$	12,641
Additions for tax positions of prior years	—			25,728
Reductions for tax positions of prior years	—			(5,092		)
Settlements	(9,006		)	(24,271		)
Balance at December 31	$	—		$	9,006