Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2018

Asset Retirement Obligation Disclosure [Abstract]

Summary of Changes in Asset Retirement Obligations

A summary of changes in our asset retirement obligations is as follows (in thousands):

Predecessor
Balance at December 31, 2015	$	12,570
Additions	68
Costs incurred	(918		)
Accretion expense	570
Disposals	(400		)
Balance at December 15, 2016	11,890
Successor
Balance at December 15, 2016	9,035
Additions	—
Costs incurred	—
Accretion expense	34
Disposals	—
Balance at December 31, 2016	9,069
Additions	36
Costs incurred	(147		)
Accretion expense	221
Disposals	(248		)
Balance at December 31, 2017	8,931
Additions	340
Costs incurred	(417		)
Accretion expense	164
Disposals	—
Balance at December 31, 2018	$	9,018