Asset Retirement Obligations (Tables)

3 Months Ended

Mar. 31, 2016

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 beginning of period, January 1, 2016	$	89,492
Obligations incurred with development activities	404
Accretion expense	1,812
Obligations discharged with asset retirements	(2,105		)
Balance end of period, March 31, 2016	89,603
Less current portion	(6,900		)
Long-term portion	$	82,703