Financial Statement Restatement (Tables)

9 Months Ended

Sep. 30, 2012

Accounting Changes and Error Corrections [Abstract]

Schedule of Error Corrections and Prior Period Adjustments [Table Text Block]

	For the Three Months Ended				For the Nine Months Ended
	September 30, 2012				September 30, 2012
		Previously Reported		As Restated		Previously Reported		As Restated
	(in thousands, except per/share data)				(in thousands, except per/share data)
Consolidated Statements of Income
Depreciation, depletion and amortization	$	200,655	$	203,935	$	602,112	$	605,392
Impairment of natural gas and oil properties	$	441,465	$	289,821	$	1,377,364	$	1,090,473
Deferred Benefit for Income Taxes	$	(85,856)	$	(28,254)	$	(320,731)	$	(210,850)
Net Loss	$	(144,815)	$	(54,053)	$	(525,211)	$	(351,481)
Loss Per Share:
Basic	$	(0.42)	$	(0.16)	$	(1.51)	$	(1.01)
Diluted	$	(0.42)	$	(0.16)	$	(1.51)	$	(1.01)

	At September 30, 2012
		Previously Reported		As Restated
	(in thousands)
Consolidated Balance Sheet
Accumulated depreciation, depletion and amortization	$	(6,414,955)	$	(6,131,344)
Deferred income taxes	$	1,203,703	$	1,313,584
Retained earnings	$	2,131,003	$	2,304,733

	For the Nine Months Ended
	September 30, 2012
		Previously Reported		As Restated
	(in thousands)
Cash Flows From Operating Activities
Net loss	$	(525,211)	$	(351,481)
Impairment of natural gas and oil properties	$	1,377,364	$	1,090,473
Deferred income taxes	$	(320,731)	$	(210,850)