Asset Retirement Obligations (Tables)

3 Months Ended

Mar. 31, 2018

Asset Retirement Obligation Disclosure [Abstract]

Schedule of Asset Retirement Obligations

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

	Three Months Ended
	March 31,
	2018			2017
	(In thousands)
ARO liability, January 1:	$	69,444		$	70,170
Accretion of discount	659			785
Liability incurred	118			658
Liability settled	(1,626		)	(630		)
Liability sold	(81		)	(432		)
Revision of estimates (1)	(4,751		)	(508		)
ARO liability, March 31:	63,763			70,043
Less current portion	1,477			3,243
Total long-term ARO	$	62,286		$	66,800

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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.