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Asset Retirement Obligations Asset Retirement Obligations (Tables)
 3 Months Ended
Mar. 31, 2020
Asset Retirement Obligation Disclosure [Abstract]  
Roll-forward of our asset retirement obligations
The following provides a roll-forward of our asset retirement obligations for the year ended December 31, 2019 and the three months ended March 31, 2020 (in thousands):

Asset Retirement Obligations as of December 31, 2018
$
4,259

Accretion expense
329

Liabilities incurred for new wells and facilities construction
250

Reductions due to plugged wells and facilities
(82
)
Revisions in estimates
(309
)
Asset Retirement Obligations as of December 31, 2019
$
4,447

Accretion expense
86

Liabilities incurred for new wells and facilities construction
33

Reductions due to plugged wells and facilities
(8
)
Asset Retirement Obligations as of March 31, 2020
$
4,558