Asset Retirement Obligations (Tables)

3 Months Ended

Mar. 31, 2015

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 interest in crude oil and natural gas properties:

	Amount
	(in thousands)
Balance at beginning of period, January 1, 2015	$	73,855
Obligations incurred with development activities	302
Accretion expense	1,560
Obligations discharged with asset retirements	(777		)
Balance end of period, March 31, 2015	74,940
Less current portion	(2,792		)
Long-term portion	$	72,148