Derivatives and Risk Management (Tables)

6 Months Ended

Jun. 30, 2011

Derivatives And Risk Management

Balance Sheet Classification of Derivative Financial Instruments

	Derivative Assets
	June 30, 2011		December 31, 2010
	Balance Sheet Classification	Fair Value	Balance Sheet Classification	Fair Value
	(in thousands)
Derivatives designated as hedging instruments:
Fixed and floating price swaps	Hedging asset	$        123,608	Hedging asset	$          81,797
Costless-collars	Hedging asset	59,532	Hedging asset	48,582
Fixed and floating price swaps	Other assets	19,717	Other assets	5,086
Costless-collars	Other assets	37,665	Other assets	72,827
Total derivatives designated as hedging instruments		$        240,522		$        208,292
Derivatives not designated as hedging instruments:
Basis swaps	Hedging asset	$               138	Hedging asset	$                 33
Basis swaps	Other assets	196	Other assets	0
Total derivatives not designated as hedging instruments		$               334		$                 33
Total derivative assets		$        240,856		$        208,325
	Derivative Liabilities
	June 30, 2011		December 31, 2010
	Balance Sheet Classification	Fair Value	Balance Sheet Classification	Fair Value
	(in thousands)
Derivatives designated as hedging instruments:
Fixed and floating price swaps	Hedging liability	$            2,266	Hedging liability	$            1,774
Costless-collars	Hedging liability	2,374	Hedging liability	3,903
Fixed and floating price swaps	Long-term hedging liability	27,294	Long-term hedging liability	22,334
Costless-collars	Long-term hedging liability	5,262	Long-term hedging liability	17,854
Total derivatives designated as hedging instruments		$          37,196		$          45,865
Derivatives not designated as hedging instruments:
Basis swaps	Hedging liability	$               240	Hedging liability	$            2,008
Basis swaps	Long-term hedging liability	260	Long-term hedging liability	0
Total derivatives not designated as hedging instruments		$               500		$            2,008
Total derivative liabilities		$          37,696		$          47,873

Cash Flow Hedges, Volumes of Natural Gas Production (in Bcf)

Year:	Fixed price swaps	Costless-collars
2011	128.9	31.3
2012	185.7	80.5
2013	185.2	0

Before Tax Effect of Derivatives on Consolidated Financial Statements

		Gain Recognized in Other Comprehensive Income (Effective Portion)
		For the three months ended		For the six months ended
		June 30,		June 30,
Derivative Instrument		2011	2010	2011	2010
		(in thousands)
Fixed price swaps		$   120,510	$     15,220	$    129,579	$     90,534
Costless-collars		$     14,875	$     20,215	$     16,829	$     55,532
	Classification of Gain Reclassified from Accumulated Other	Gain Reclassified from Accumulated Other Comprehensive Income into Earnings (Effective Portion)
	Comprehensive Income	For the three months ended		For the six months ended
	into Earnings	June 30,		June 30,
Derivative Instrument	(Effective Portion)	2011	2010	2011	2010
		(in thousands)
Fixed price swaps	Gas Sales	$     41,736	$     44,581	$     78,537	$     78,254
Costless-collars	Gas Sales	$     11,962	$     18,109	$     27,060	$     34,562
		Gain (Loss) Recognized in Earnings (Ineffective Portion)
	Classification of Gain (Loss)	For the three months ended		For the six months ended
	Recognized in Earnings	June 30,		June 30,
Derivative Instrument	(Ineffective Portion)	2011	2010	2011	2010
		(in thousands)
Fixed price swaps	Gas Sales	$      3,066	$    (4,139)	$         999	$    (3,666)
Costless-collars	Gas Sales	$    (1,083)	$    (1,045)	$       1,078	$    (1,420)

Before Tax Effect of Basic Swaps Not Qualifying for Hedge Accounting

		Unrealized Gain (Loss) Recognized in Earnings
	Income Statement	For the three months ended		For the six months ended
	Classification	June 30,		June 30,
Derivative Instrument	of Unrealized Gain (Loss)	2011	2010	2011	2010
		(in thousands)
Basis swaps	Gas Sales	$         902	$      3,066	$       1,808	$      7,876
		Realized Gain (Loss) Recognized in Earnings
	Income Statement	For the three months ended		For the six months ended
	Classification	June 30,		June 30,
Derivative Instrument	of Realized Gain (Loss)	2011	2010	2011	2010
		(in thousands)
Basis swaps	Gas Sales	$        (99)	$    (2,387)	$    (2,355)	$    (7,231)