Discontinued Operations (Tables)

6 Months Ended

Jun. 30, 2011

Discontinued Operations [Abstract]

Components of discontinued operations

	Three Months Ended June 30,					Six Months Ended June 30,
	2011		2010			2011		2010
Revenues and other income
Natural gas, NGL and oil sales	$	10,777	$	33,631		$	53,034	$	82,718
Transportation and gathering		1		11			6		23
Gain on the sale of assets		3,820		—			3,820		955
Other		—		—			4		—
Total revenues and other income		14,598		33,642			56,864		83,696
Costs and expenses
Direct operating		2,169		8,604			10,446		17,808
Production and ad valorem taxes		184		2,427			1,250		3,955
Exploration		5		53			37		549
Abandonment and impairment of unproved properties		—		3,770			—		9,626
Interest expense		3,715		9,508			14,791		18,864
Depletion, depreciation and amortization		14		23,184			8,894		47,003
Total costs and expenses		6,087		47,546			35,418		97,805
Income (loss) from discontinued operations before income taxes		8,511		(13,904	)		21,446		(14,109	)
Income tax expense (benefit)
Current		—		—			—		—
Deferred		2,994		(5,310	)		7,531		(5,388	)
Total income tax expense (benefit)		2,994		(5,310	)		7,531		(5,388	)
Net income (loss) from discontinued operations	$	5,517	$	(8,594	)	$	13,915	$	(8,721	)

Composition of assets and liabilities of discontinued operations

	June 30,		December 31,
	2011		2010
Composition of assets of discontinued operations:
Natural gas and oil properties, net	$	12,546	$	838,044
Transportation and field assets, net		—		684
Accounts receivable		3,805		29,300
Unrealized derivative gain		—		8,195
Inventory and other		—		81
Total assets of discontinued operations	$	16,351	$	876,304
Composition of liabilities of discontinued operations:
Account payable	$	12,592	$	23,366
Accrued liabilities		6,789		9,596
Total current liabilities of discontinued operations	$	19,381	$	32,962
Asset retirement obligations	$	—	$	1,980
Other liabilities		—		1,921
Total long-term liabilities of discontinued operations	$	—	$	3,901