Income Taxes (Tables)

12 Months Ended

Dec. 31, 2016

The benefit (provision) for income taxes is comprised of the following (dollars in thousands):

	For the Years Ended December 31,
	2016			2015			2014
Federal:
Current	$	(12	)	$	49		$	1,367
Deferred		(3,248	)		95,259			182,371
Total Federal		(3,260	)		95,308			183,738
State:
Current		(2,118	)		(3,099	)		(2,433	)
Deferred (included in Federal above)		—			—			—
Total State		(2,118	)		(3,099	)		(2,433	)
Total	$	(5,378	)	$	92,209		$	181,305

Reconciliation of the benefit for income taxes to the amount computed at the U.S. Federal statutory rate

A reconciliation of the benefit (provision) for income taxes to the amount computed at the U.S. Federal statutory rate of 35% is as follows (dollars in thousands):

	For the Years Ended December 31,
	2016			2015			2014
Tax benefit at U.S. statutory rate	$	139,657		$	192,390		$	115,603
State taxes, net of federal income tax		11,788			18,323			11,582
Tax credits		6,163			3,937			(2,222	)
Valuation allowance		(142,862	)		(111,797	)		64,155
Goodwill impairment		(10,789	)		(7,856	)		—
Stock compensation		(5,716	)		—			—
Other, net		(1,831	)		(1,626	)		(713	)
Return to provision		(920	)		(72	)		716
Meals and entertainment		(868	)		(1,090	)		(946	)
Non-deductible transaction costs		—			—			(6,870	)
Total	$	(5,378	)	$	92,209		$	181,305

Components of deferred tax assets and liabilities

Significant components of the Company's deferred tax assets and liabilities at December 31 are as follows (dollars in thousands):

	2016			2015
Deferred income tax assets:
Capital and financing lease obligations	$	862,038		$	872,002
Operating loss carryforwards		319,948			282,075
Accrued expenses		109,283			144,691
Deferred lease liability		93,358			94,105
Tax credits		49,550			40,974
Intangible assets		20,272			22,522
Deferred gain on sale leaseback		4,233			5,661
Prepaid revenue		2,626			2,415
Total gross deferred income tax asset		1,461,308			1,464,445
Valuation allowance		(264,305	)		(121,602	)
Net deferred income tax assets		1,197,003			1,342,843
Deferred income tax liabilities:
Property, plant and equipment		(1,209,595	)		(1,320,423	)
Investment in unconsolidated ventures		(66,678	)		(88,798	)
Other		(1,376	)		(2,673	)
Total gross deferred income tax liability		(1,277,649	)		(1,411,894	)
Net deferred tax liability	$	(80,646	)	$	(69,051	)

Reconciliation of the unrecognized tax benefits

A reconciliation of the unrecognized tax benefits for the years ended December 31, 2016 and 2015 is as follows (dollars in thousands):

	For the Years Ended December 31,
	2016			2015
Balance at January 1,	$	30,236		$	30,195
Additions for tax positions related to the current year		—			—
Additions for tax positions related to prior years		30			50
Reductions for tax positions related to prior years		(1,106	)		(9	)
Balance at December 31,	$	29,160		$	30,236