Asset Retirement Obligations

3 Months Ended

Mar. 31, 2019

Asset Retirement Obligation Disclosure [Abstract]

Asset Retirement Obligations

(11) ASSET RETIREMENT OBLIGATIONS

Our asset retirement obligations primarily represent the estimated present value of the amounts we will incur to plug, abandon and remediate our producing properties at the end of their productive lives. Significant inputs used in determining such obligations include estimates of plugging and abandonment costs, estimated future inflation rates and well lives. The inputs are calculated based on historical data as well as current estimated costs. A reconciliation of our liability for plugging and abandonment costs for the three months ended March 31, 2019 is as follows (in thousands):

	Three Months Ended March 31,  2019
Beginning of period	$	312,754
Liabilities incurred		1,719
Liabilities settled		(896	)
Accretion expense		4,217
Change in estimate		(187	)
End of period		317,607
Less current portion		(5,485	)
Long-term asset retirement obligations	$	312,122

Accretion expense is recognized as a component of depreciation, depletion and amortization expense in the accompanying consolidated statements of operations.