Asset Retirement Obligations (Tables)

6 Months Ended

Jun. 30, 2019

Asset Retirement Obligation Disclosure [Abstract]

Summary Of Changes In Asset Retirement Obligations

	Successor						Predecessor
(in thousands)	Six Months Ended June 30, 2019			February 9, 2018 Through June 30, 2018			January 1, 2018 Through February 8, 2018
Balance, beginning of period	$	11,552		$	—		$	10,469
Liabilities assumed in Business Combination	—			5,998			—
Liabilities incurred	634			877			—
Liabilities settled	(162		)	(806		)	(63		)
Liabilities transferred in sale of properties	—			(20		)	—
Revisions to estimates	(8		)	665			63
Accretion expense	470			263			40
Balance, end of period	12,486			6,977			10,509
Less: current portion	44			538			33
Long-term portion	$	12,442		$	6,439		$	10,476