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Asset Retirement Obligations Asset Retirement Obligations (Tables)
 12 Months Ended
Dec. 31, 2017
Asset Retirement Obligation Disclosure [Abstract]  
Roll-forward of our asset retirement obligations
The following provides a roll-forward of our asset retirement obligations (in thousands):
Asset Retirement Obligations as of December 31, 2015
$
63,555

Accretion expense
1,610

Liabilities incurred for new wells and facilities construction
1

Reductions due to sold wells and facilities
(6,545
)
Reductions due to plugged wells and facilities
(85
)
Revisions in estimates
488

Asset Retirement Obligations as of April 22, 2016 (Predecessor)
$
59,024

Fair value fresh start adjustment
5,216

 
 
 
 
Asset Retirement Obligation as of April 22, 2016 (Successor)
$
64,240

Accretion expense
2,878

Liabilities incurred for new wells and facilities construction
34

Reductions due to sold wells and facilities
(42,857
)
Reductions due to plugged wells and facilities
(916
)
Revisions in estimates
8,877

Asset Retirement Obligations as of December 31, 2016 (Successor)
$
32,256

Accretion expense
2,322

Liabilities incurred for new wells and facilities construction
253

Reductions due to sold wells and facilities
(21,466
)
Reductions due to plugged wells and facilities
(2,366
)
Revisions in estimates
(212
)
Asset Retirement Obligations as of December 31, 2017 (Successor)
$
10,787