Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2015

Fair Value Measurements

Schedule of Company's assets and liabilities that are measured at fair value on a recurring basis

	Fair Value Measurements Using:
	Quoted Prices in
	Active Markets for		Significant Other		Significant
	Identical Assets		Observable Inputs		Unobservable Inputs
	(Level 1)		(Level 2)		(Level 3)		Total
	(In thousands)
December 31, 2015
Assets:
Commodity derivatives	$	—	$	241,837	$	—	$	241,837
Interest rate derivatives		—		659		—		659
Liabilities:
Commodity derivatives		—		(4,196)		—		(4,196)
Interest rate derivatives		—		(1,155)		—		(1,155)
Total	$	—	$	237,145	$	—	$	237,145
December 31, 2014
Assets:
Commodity derivatives	$	—	$	252,485	$	—	$	252,485
Liabilities:
Interest rate derivatives		—		(789)		—		(789)
Total	$	—	$	251,696	$	—	$	251,696

Schedule of carrying values and fair values of financial instruments that are not carried at fair value

	December 31, 2015				December 31, 2014
	Carrying Value		Fair Value		Carrying Value		Fair Value
	(In thousands)
Long-term debt	$	900,186	$	823,612	$	794,269	$	755,000