Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2013

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 Identical Assets		Significant Other Observable Inputs			Significant Unobservable Inputs
	(Level 1)		(Level 2)			(Level 3)		Total
	(In thousands)
March 31, 2013
Assets:
Commodity derivatives	$	—	$	3,204		$	—	$	3,204
Liabilities:
Commodity derivatives	—		(15,877		)	—		(15,877		)
Interest rate derivatives	—		(5,912		)	—		(5,912		)
Total	$	—	$	(18,585	)	$	—	$	(18,585	)
December 31, 2012
Assets:
Commodity derivatives	$	—	$	1,061		$	—	$	1,061
Liabilities:
Commodity derivatives	—		(17,664		)	—		(17,664		)
Interest rate derivatives	—		(5,939		)	—		(5,939		)
Total	$	—	$	(22,542	)	$	—	$	(22,542	)