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Asset Retirement Obligation (Tables)
 3 Months Ended
Mar. 31, 2019
Asset Retirement Obligation Disclosure [Abstract]  
Changes to the Company's asset retirement obligation liability
The following table describes the changes to the Company’s asset retirement obligation liability (in thousands):
 
Successor
 
Predecessor
 
February 9 through March 31,
 
January 1 through February 8,
 
Three Months Ended March 31,
 
2019
 
2019
 
2018
Asset retirement obligation, beginning of period
$
2,486

 
$
2,480

 
$
31,310

Liabilities incurred
—

 
—

 
7

Liabilities settled
(50
)
 
(11
)
 
(57
)
Accretion expense
23

 
17

 
198

Revisions in estimates
785

 
—

 
(2
)
Divestiture of oil and gas properties
—

 
—

 
(28,214
)
Asset retirement obligation, end of period
3,244

 
2,486

 
3,242

Less: current portion of asset retirement obligation
(723
)
 
(183
)
 
(938
)
Long-term asset retirement obligation
$
2,521

 
$
2,303

 
$
2,304