Asset Retirement Obligations (Tables)

9 Months Ended

Sep. 30, 2017

Asset Retirement Obligation Disclosure [Abstract]

Schedule of Change in Asset Retirement Obligation

The following table presents the changes in carrying amounts of the asset retirement obligations associated with our working interests in crude oil and natural gas properties:

	Amount
	(in thousands)
Balance at December 31, 2016	$	92,387
Obligations incurred with development activities	3,296
Accretion expense	4,906
Revisions in estimated cash flows	155
Obligations discharged with asset retirements	(8,929		)
Balance at September 30, 2017	91,815
Less liabilities held for sale	(499		)
Less current portion	(13,128		)
Long-term portion	$	78,188