Asset Retirement Obligations Asset Retirement Obligations (Tables)

3 Months Ended

Mar. 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 for the year ended December 31, 2017 and the three months ended March 31, 2018 (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	159
Liabilities incurred for new wells and facilities construction	7
Reductions due to sold wells and facilities	(6,265		)
Reductions due to plugged wells and facilities	(121		)
Revisions in estimates	85
Asset Retirement Obligations as of March 31, 2018	$	4,652