Asset Retirement Obligations (Tables)

9 Months Ended

Sep. 30, 2018

Asset Retirement Obligation Disclosure [Abstract]

Schedule of Asset Retirement Obligations

The following table shows certain information about our AROs for the periods indicated:

	Nine Months Ended
	September 30,
	2018			2017
	(In thousands)
ARO liability, January 1:	$	69,444		$	70,170
Accretion of discount	1,829			2,112
Liability incurred	244			1,123
Liability settled	(3,907		)	(1,350		)
Liability sold	(105		)	(1,563		)
Revision of estimates (1)	(4,778		)	4,993
ARO liability, September 30:	62,727			75,485
Less current portion	1,451			2,947
Total long-term ARO	$	61,276		$	72,538

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(1) Plugging liability estimates were revised in both 2018 and 2017 for updates in the cost of services used to plug wells over the preceding year. We had various upward and downward adjustments.