Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2017

Fair Value Disclosures [Abstract]

Hierarchy of Fair Value, Assets and Liabilities Measured on Recurring Basis

The following tables set forth by level, within the fair value hierarchy, the Company’s financial assets and liabilities that were accounted for at fair value on a recurring basis:

	Fair value at September 30, 2017
	Level 1		Level 2		Level 3		Total
	(In thousands)
Assets:
Money market funds	$	142	$	—	$	—	$	142
Commodity derivative instruments (see Note 7)	—		1,395		—		1,395
Total assets	$	142	$	1,395	$	—	$	1,537
Liabilities:
Commodity derivative instruments (see Note 7)	$	—	$	20,115	$	—	$	20,115
Total liabilities	$	—	$	20,115	$	—	$	20,115

	Fair value at December 31, 2016
	Level 1		Level 2		Level 3		Total
	(In thousands)
Assets:
Money market funds	$	141	$	—	$	—	$	141
Commodity derivative instruments (see Note 7)	—		362		—		362
Total assets	$	141	$	362	$	—	$	503
Liabilities:
Commodity derivative instruments (see Note 7)	$	—	$	72,183	$	—	$	72,183
Total liabilities	$	—	$	72,183	$	—	$	72,183