Income Taxes (Tables)

12 Months Ended

Dec. 31, 2017

Income Tax Disclosure [Abstract]

Summary of Provision for Income Taxes from Continuing Operations

The following table summarizes our provision for income taxes for the periods presented: 

	Successor					Predecessor
	Year Ended			September 13 Through		January 1 Through		Year Ended
	December 31,			December 31,		September 12,		December 31,
	2017			2016		2016		2015
Current income taxes (benefit)
Federal	$	—		$	—	$	—	$	(660	)
State	—			—		—		1
	—			—		—		(659		)
Deferred income taxes (benefit)
Federal	(4,943		)	—		—		(261		)
State	—			—		—		(4,451		)
	(4,943		)	—		—		(4,712		)
	$	(4,943	)	$	—	$	—	$	(5,371	)

Income Taxes Reconciliation

The following table reconciles the difference between the income tax benefit computed by applying the statutory tax rate to our income (loss) before income taxes and our reported income tax benefit for the periods presented: 

	Successor												Predecessor
	Year Ended						September 13 Through						January 1 Through					Year Ended
	December 31,						December 31,						September 12,					December 31,
	2017						2016						2016					2015
Computed at federal statutory rate	$	9,701		35.0	%		$	(1,854	)		35.0	%	$	369,111		35.0	%	$	(555,916	)	35.0	%
State income taxes, net of federal income tax benefit	(1,383		)	(5.0	)%		197				(3.7	)%	1,989			0.2	%	(4,438		)	0.3	%
Change in valuation allowance	(24,353		)	(87.8	)%		1,657				(31.3	)%	(384,692		)	(36.5	)%	554,879			(35.0	)%
Effect of rate change on the valuation allowance	(86,612		)	(312.5	)%	—	—			—	—	%	—			—	%	—			—	%
Effect of rate change	86,612			312.5	%		—				—	%	—			—	%	—			—	%
Reorganization adjustments	10,760			38.8	%		—				—	%	13,572			1.3	%	—			—	%
Other, net	332			1.2	%		—				—	%	20			—	%	104			—	%
	$	(4,943	)	(17.8	)%		$	—			—	%	$	—		—	%	$	(5,371	)	0.3	%

Summary of Principal Components of Net Deferred Income Tax Liability

The following table summarizes the principal components of our deferred income tax assets and liabilities as of the dates presented: 

	December 31,
	2017			2016
Deferred tax assets:
Property and equipment	$	37,345		$	183,303
Pension and postretirement benefits	452			710
Share-based compensation	435			28
Net operating loss (“NOL”) carryforwards	127,821			87,622
Fair value of derivative instruments	8,752			9,579
Other	7,608			7,166
	182,413			288,408
Less:  Valuation allowance	(177,470		)	(288,408		)
Net deferred tax assets	$	4,943		$	—