Supplementary Financial Information for Oil and Gas Producing Activities (Tables)

12 Months Ended

Dec. 31, 2012

Supplementary Financial Information for Oil and Gas Producing Activities

Schedule of results of operations from oil and gas producing activities

	2012		2011		2010
Results of Operations
Revenues	$	7,121	$	12,878	$	7,425
Production and operating costs		1,891		2,269		1,421
Depreciation and depletion		1,291		1,402		1,172
Results of operations before income taxes		3,939		9,207		4,832
Income tax expense		1,044		2,664		1,410
Results of operations (excluding corporate overhead and interest costs)	$	2,895	$	6,543	$	3,422
Costs Incurred
Development costs incurred	$	81	$	927	$	2,204
Exploration costs		—		—		—
Capitalized asset retirement costs		—	$	3	$	3
Property acquisition costs		—		—		—
Capitalized Costs
Natural gas properties—proved	$	18,301	$	18,220	$	17,295
Less: accumulated depreciation and depletion		7,294		5,997		4,593
Net capitalized costs for natural gas properties	$	11,007	$	12,223	$	12,702

Summary of changes in proved reserves

	Natural Gas (BCF)			Natural Gas Liquids (MMBBLS)			Natural Gas (BCF)			Natural Gas Liquids (MMBBLS)			Natural Gas (BCF)			Natural Gas Liquids (MMBBLS)
	2012			2012			2011			2011			2010			2010
Proved reserves—beginning of year		10.3			1.5			12.3			1.2			13.3			1.8
Revisions of previous estimates		(0.8	)		(0.3	)		(0.8	)		0.5			(0.6	)		(0.6	)
Extensions and discoveries		—			—			—			—			0.4			—
Production		(1.2	)		(0.1	)		(1.2	)		(0.2	)		(0.8	)		—
Proved reserves—end of year		8.3			1.1			10.3			1.5			12.3			1.2
Proved developed reserves—end of year		8.3			1.1			10.3			1.5			11.7			1.2

Schedule of standardized measure of discounted future net cash flows

	2012			2011			2010
Future estimated gross revenues	$	57,882		$	120,920		$	102,198
Future estimated production and development costs		(23,905	)		(32,138	)		(31,406	)
Future estimated net revenues		33,977			88,782			70,792
Future estimated income tax expense		(9,193	)		(25,627	)		(20,174	)
Future estimated net cash flows		24,784			63,155			50,618
10% annual discount for estimated timing of cash flows		(12,020	)		(33,207	)		(24,162	)
Standardized measure of discounted future estimated net cash flows	$	12,764		$	29,948		$	26,456

Schedule of changes in standardized measure of discounted future net cash flows

	2012			2011			2010
Standardized measure—beginning of year	$	29,948		$	26,456		$	23,076
Net change in sales prices and production costs		(7,067	)		2,403			8,689
Sales of natural gas produced, net of production costs		(5,230	)		(7,805	)		(5,992	)
Extensions and discoveries, net of related costs		—			—			1,737
Future development costs		—			—			(716	)
Net change due to changes in quantity estimates		(5,863	)		4,086			(5,488	)
Previously estimated development costs incurred		116			925			1,549
Net change in income taxes		7,419			(1,609	)		(1,237	)
Accretion of discount		1,603			3,211			2,962
Timing of production of reserves and other		(8,162	)		2,281			1,876
Standardized measure—end of year	$	12,764		$	29,948		$	26,456