Income Taxes (Tables)

12 Months Ended

Dec. 31, 2016

Income Tax Disclosure [Abstract]

Summary of net deferred tax position

The Company’s net deferred tax position as of December 31, 2016 and 2015, respectively, is as follows (in thousands).

	December 31,
	2016			2015
Deferred tax assets
Unrealized loss on derivatives	$	8,734		$	—
Net operating loss carryforwards	137,757			79,208
Alternative minimum tax carryforward	8,633			9,785
Percentage depletion carryover	2,595			2,442
Property and equipment	44,391			42,757
Deferred gain on sale leaseback transaction	—			32,831
Other	—			7,396
Total deferred tax assets	202,110			174,419
Valuation allowance on deferred tax assets	(190,255		)	(154,320		)
Total deferred tax assets, net of valuation allowance	11,855			20,099
Deferred tax liabilities
Unrealized gain on derivatives	(3,800		)	(5,699		)
Other	(8,055		)	(14,400		)
Total deferred tax liabilities	(11,855		)	(20,099		)
Net deferred tax liabilities	$	—		$	—

Income tax expense reconciled to the tax computed at the statutory federal rate

The current income tax provision for the years ended December 31, 2016, 2015 and 2014, respectively, was comprised of the following (in thousands).

	Year Ended December 31,
	2016			2015		2014
Current income tax provision
State income tax	$	108		$	371	$	—
Federal alternative minimum tax	(1,144		)	2,588		133
Net current income tax (benefit) provision	$	(1,036	)	$	2,959	$	133

Reconciliations of the tax (benefit) expense computed at the statutory federal rate to the Company’s total income tax (benefit) provision for the years ended December 31, 2016, 2015 and 2014, respectively, is as follows (in thousands).

	Year Ended December 31,
	2016			2015			2014
Federal tax (benefit) expense at statutory rate (1)	$	(34,333	)	$	(289,412	)	$	61,301
State income tax	539			(13,215		)	2,707
Permanent differences (2)	(499		)	698			397
Federal alternative minimum tax	1,144			(2,588		)	(133		)
Change in federal valuation allowance	33,688			145,777			—
Change in state valuation allowance	(539		)	8,413			(30		)
Net deferred income tax (benefit) provision	—			(150,327		)	64,242
Net current income tax (benefit) provision	(1,036		)	2,959			133
Total income tax (benefit) provision	$	(1,036	)	$	(147,368	)	$	64,375

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(1) The statutory federal tax rate was 35% for the years ended December 31, 2016, 2015 and 2014.

(2) Amount is primarily attributable to stock-based compensation.