Asset Retirement Obligations

3 Months Ended

Mar. 31, 2015

Asset Retirement Obligation Disclosure [Abstract]

Asset Retirement Obligations

Asset Retirement Obligations

Activity related to the Company’s asset retirement obligations is as follows:

(In thousands)	Three Months Ended   March 31, 2015
Balance at beginning of period	$	126,655
Liabilities incurred	4,355
Liabilities settled	(113		)
Accretion expense	1,644
Balance at end of period	$	132,541

As of both March 31, 2015 and December 31, 2014, approximately $2.0 million is included in accrued liabilities in the Condensed Consolidated Balance Sheet, which represents the current portion of the Company’s asset retirement obligations.