XML 52 R36.htm IDEA: XBRL DOCUMENT v3.10.0.1
Asset Retirement Obligations Asset Retirement Obligations (Tables)
 12 Months Ended
Dec. 31, 2018
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, 2016
$
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
$
10,787

Accretion expense
419

Liabilities incurred for new wells and facilities construction
93

Reductions due to sold wells and facilities
(6,298
)
Reductions due to plugged wells and facilities
(180
)
Revisions in estimates
(562
)
Asset Retirement Obligations as of December 31, 2018
$
4,259