Derivative Instruments (Tables)

9 Months Ended

Sep. 30, 2012

Commodity Derivative Positions

The following table sets forth our commodity derivative positions as of September 30, 2012:

		Average Volume Per Day	Weighted Average Price				Fair Value
	Instrument		Floor/Swap		Ceiling		Asset		Liability
Natural Gas:		(in MMBtu)	($/MMBtu)
Fourth quarter 2012	Swaps	10,000	$	5.10			$	1,636	$	—
Crude Oil:		(barrels)	($/barrel)
Fourth quarter 2012	Collars	1,000	$	90.00	$	97.00	52		—
First quarter 2013	Collars	1,000	$	90.00	$	100.00	105		—
Second quarter 2013	Collars	1,000	$	90.00	$	100.00	93		—
Third quarter 2013	Collars	1,000	$	90.00	$	100.00	124		—
Fourth quarter 2013	Collars	1,000	$	90.00	$	100.00	161		—
Fourth quarter 2012	Swaps	3,000	$	104.40			3,211		—
First quarter 2013	Swaps	2,250	$	103.51			1,954		—
Second quarter 2013	Swaps	2,250	$	103.51			1,912		—
Third quarter 2013	Swaps	1,500	$	102.77			1,230		—
Fourth quarter 2013	Swaps	1,500	$	102.77			1,294		—
First quarter 2014	Swaps	2,000	$	100.44			1,406		—
Second quarter 2014	Swaps	2,000	$	100.44			1,540		—
Third quarter 2014	Swaps	1,500	$	100.20			1,218		—
Fourth quarter 2014	Swaps	1,500	$	100.20			1,274		—
First quarter 2013	Swaption	1,100	$	100.00			—		299
Second quarter 2013	Swaption	1,000	$	100.00			—		267
Third quarter 2013	Swaption	900	$	100.00			—		203
Fourth quarter 2013	Swaption	750	$	100.00			—		133
First quarter 2014	Swaption	812	$	100.00			—		386
Second quarter 2014	Swaption	812	$	100.00			—		386
Third quarter 2014	Swaption	812	$	100.00			—		386
Fourth quarter 2014	Swaption	812	$	100.00			—		386
Settlements to be received in subsequent period							886		—

Impact of Derivative Activities on Condensed Consolidated Statements of Income

The impact of our derivative activities on income is included in the Derivatives caption on our Condensed Consolidated Statements of Operations. The following table summarizes the effects of our derivative activities for the periods presented:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2012			2011			2012		2011
Impact by contract type:
Commodity contracts	$	(12,271	)	$	11,293		$	29,844	$	18,598
Interest rate contracts	—			205			1,406		1,229
	$	(12,271	)	$	11,498		$	31,250	$	19,827
Realized and unrealized impact:
Cash received for:
Commodity contract settlements	$	9,238		$	5,607		$	22,783	$	16,484
Interest rate contract settlements	—			2,920			1,406		3,818
	9,238			8,527			24,189		20,302
Unrealized gains (losses) attributable to:
Commodity contracts	(21,509		)	5,686			7,061		2,114
Interest rate contracts	—			(2,715		)	—		(2,589		)
	(21,509		)	2,971			7,061		(475		)
	$	(12,271	)	$	11,498		$	31,250	$	19,827

Fair Value of Derivative Instruments on Condensed Consolidated Balance Sheets

The following table summarizes the fair value of our derivative instruments, as well as the locations of these instruments, on our Condensed Consolidated Balance Sheets as of the dates presented:

		Fair Values as of
		September 30, 2012				December 31, 2011
Type	Balance Sheet Location	Derivative Assets		Derivative Liabilities		Derivative Assets		Derivative Liabilities
Commodity contracts	Derivative assets/liabilities - current	$	11,252	$	817	$	18,987	$	3,549
Interest rate contracts	Derivative assets/liabilities - current	—		—		—		—
		11,252		817		18,987		3,549
Commodity contracts	Derivative assets/liabilities - noncurrent	6,892		1,677		—		6,850
Interest rate contracts	Derivative assets/liabilities - noncurrent	—		—		—		—
		6,892		1,677		—		6,850
		$	18,144	$	2,494	$	18,987	$	10,399