Asset Retirement Obligations (Tables)

6 Months Ended

Jun. 30, 2019

Asset Retirement Obligation Disclosure [Abstract]

Summary of Changes in Asset Retirement Obligations

The Company’s asset retirement obligations primarily relate to the Company’s portion of future plugging and abandonment costs for wells and related facilities. The following table presents the changes in the asset retirement obligations for the six months ended June 30, 2019 (in thousands):

Asset retirement obligations at beginning of period	$	76,344
Liabilities added from acquisition or drilling		37
Liabilities settled		(205	)
Accretion expense		2,643
Revision of estimates		75
Asset retirement obligation at end of period		78,894
Less: Current portion		(477	)
Asset retirement obligations - long-term portion	$	78,417