Derivative Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2011

Derivative Financial Instruments [Abstract]

Fair Value Of Derivative Financial Instruments

(in thousands)	Balance Sheet location	September 30, 2011			December 31, 2010
Commodity contracts	Derivative financial instruments - Current assets	$	114,034		$	73,176
Commodity contracts	Derivative financial instruments - Long-term assets		23,356			23,722
Commodity contracts	Derivative financial instruments - Current liabilities		0			(3,775	)
Commodity contracts	Derivative financial instruments - Long-term liabilities		(578	)		(4,200	)
Net derivatives		$	136,812		$	88,923

Effect Of Derivative Financial Instruments

		Three months ended September 30,				Nine months ended September 30,
(in thousands)	Statement of Operations location	2011		2010		2011		2010
Commodity contracts (1)	Gain on derivative financial instruments	$	84,284	$	56,209	$	130,978	$	156,065
Interest rate contracts (2)	Interest income (expense)		0		0		0		(45	)
Net gain		$	84,284	$	56,209	$	130,978	$	156,020

(1) Included in these amounts are net cash receipts of $32,938 and $83,090 for the three and nine months ended September 30, 2011, respectively, and net cash receipts of $43,075 and $166,660 for the three and nine months ended September 30, 2010, respectively.

(2) Included in these amounts are net cash payments of $0 and $2,063 for the three and nine months ended September 30, 2010. Our interest rate swaps expired on February 14, 2010 and we have not entered into any new interest rate swap agreements as of September 30, 2011.

Fair Value Of Oil And Gas Derivative Financial Instruments

(in thousands, except prices)	Volume Mmbtus/Bbls		Weighted average strike price per Mmbtu/Bbl		Fair value at September 30, 2011
Natural gas:
Swaps:
Remainder of 2011		30,820	$	5.17	$	41,408
2012		80,520		5.27		80,896
2013		5,475		5.99		6,301
Total natural gas		116,815				128,605
Oil:
Swaps:
Remainder of 2011		138		111.32		4,323
2012		275		95.70		3,884
Total oil		413				8,207
Total oil and natural gas derivatives					$	136,812