Restatement of Previously Issued Financial Statements (Tables)

9 Months Ended

Sep. 30, 2018

Accounting Changes and Error Corrections [Abstract]

Schedule of Error Corrections and Prior Period Adjustments

	Three Months Ended September 30, 2017									Nine Months Ended September 30, 2017
In thousands	As Previously Reported			Correction			As Restated			As Previously Reported			Correction			As Restated
Depreciation, depletion and amortization	$	15,929		$	601		$	16,530		$	40,623		$	1,380		$	42,003
Total expenses	25,142			601			25,743			94,805			1,380			96,185
Income (loss) from operations	1,741			(601		)	1,140			(32,171		)	(1,380		)	(33,551		)
Loss before income taxes	(11,479		)	(601		)	(12,080		)	(42,196		)	(1,380		)	(43,576		)
Income tax benefit	4,718			238			4,956			15,339			515			15,854
Net loss	(6,761		)	(363		)	(7,124		)	(26,857		)	(865		)	(27,722		)
Net loss attributable to common stockholders	$	(8,585	)	$	(363	)	$	(8,948	)	$	(28,977	)	$	(865	)	$	(29,842	)
Net loss per common share
Basic	$	(0.39	)	$	(0.02	)	$	(0.41	)	$	(1.33	)	$	(0.04	)	$	(1.37	)
Diluted	$	(0.39	)	$	(0.02	)	$	(0.41	)	$	(1.33	)	$	(0.04	)	$	(1.37	)

The table below sets forth the unaudited condensed consolidated statement of cash flows and operating activities, including the balances originally reported, corrections and the as-restated balances for the restated period:

	Nine Months Ended September 30, 2017
In thousands	As Previously Reported			Correction			As Restated
Cash flows from operating activities:
Net loss	$	(26,857	)	$	(865	)	$	(27,722	)
Depreciation, depletion and amortization	40,623			1,380			42,003
Deferred taxes	(15,601		)	(515		)	(16,116		)