Commitments and Contingencies (Tables)

6 Months Ended

Jun. 30, 2016

Commitments and Contingencies Disclosure [Abstract]

Summary of ARO Activity

	Six months ended
	June 30, 2016
	(In thousands)
Balance at beginning of period	$	397
Expenditures		(156	)
Settlement of asset retirement obligation		(241	)
Balance at end of period	$	—