Costs Incurred for Property Acquisition, Exploration and Development (Tables)

6 Months Ended

Jun. 30, 2012

Suspended Exploratory Well Costs/Capitalized Costs and Accumulated Depreciation, Depletion and Amortization/Costs Incurred for Property Acquisition, Exploration and Development [Abstract]

Costs Incurred for Property Acquisition, Exploration and Development

	Six Months Ended June 30, 2012		Twelve Months Ended December  31, 2011
Acreage purchases	$	151,622	$	220,576
Development		539,122		1,007,049
Exploration:
Drilling		185,081		226,920
Expense		35,112		77,259
Stock-based compensation expense		1,921		4,108
Gas gathering facilities:
Development		23,684		53,387
Subtotal		936,542		1,589,299
Asset retirement obligations		4,004		24,061
Total – continuing operations		940,546		1,613,360
Discontinued operations		—		3,241
Total costs incurred	$	940,546	$	1,616,601

^(a) Includes cost incurred whether capitalized or expensed.