Income Taxes (Tables)

12 Months Ended

Dec. 31, 2019

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: 

	Year Ended December 31,
	2019			2018			2017
Current income taxes (benefit)
Federal	$	(1,236	)	$	(2,471	)	$	—
	(1,236		)	(2,471		)	—
Deferred income taxes (benefit)
Federal	1,236			2,471			(4,943		)
State	2,137			523			—
	3,373			2,994			(4,943		)
	$	2,137		$	523		$	(4,943	)

Income Taxes Reconciliation

The following table reconciles the difference between the income tax expense (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: 

	Year Ended December 31,
	2019					2018					2017
Computed at federal statutory rate	$	15,272		21.0	%	$	47,315		21.0	%	$	9,701		35.0	%
State income taxes, net of federal income tax benefit	1,494			2.1	%	1,743			0.8	%	(1,383		)	(5.0	)%
Change in valuation allowance	(14,240		)	(19.6	)%	(48,820		)	(21.7	)%	(24,353		)	(87.8	)%
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	%
Other, net	(389		)	(0.5	)%	285			0.1	%	332			1.2	%
	$	2,137		3.0	%	$	523		0.2	%	$	(4,943	)	(17.8	)%

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,
	2019			2018
Deferred tax assets:
Net operating loss (“NOL”) carryforwards	$	175,221		$	163,437
Alternative minimum tax (“AMT”) credit carryforwards	1,236			2,471
Asset retirement obligations	1,073			647
Pension and postretirement benefits	340			441
Share-based compensation	880			546
Fair value of derivative instruments	4,191			—
Interest expense limitation	11,463			3,128
Other	2,441			2,590
	196,845			173,260
Less:  Valuation allowance	(114,939		)	(128,650		)
Total net deferred tax assets	81,906			44,610
Deferred tax liabilities:
Property and equipment	83,330			33,413
Fair value of derivative instruments	—			9,248
Total deferred tax liabilities	83,330			42,661
Net deferred tax assets (liabilities)	$	(1,424	)	$	1,949