Asset Retirement Obligations (Tables)

3 Months Ended

Mar. 31, 2016

Asset Retirement Obligation Disclosure [Abstract]

Schedule of Changes in Asset Retirement Obligation

Changes in the asset retirement obligation (in thousands) during the three months ended March 31, 2016 are as follows:

	March 31,   2016
Beginning balance	$	12,254
Payments	—
Accretion	240
Additions and revisions of prior estimates	—
Ending balance	$	12,494