Oil and Natural Gas Capitalized Costs

9 Months Ended

Sep. 30, 2011

Oil And Gas Exploration And Production Industries Disclosures [Abstract]

Oil and Natural Gas Capitalized Costs

Note 4 - Oil and Natural Gas Capitalized Costs

Aggregate capitalized costs related to oil, natural gas and NGL production activities with applicable accumulated depletion and amortization are presented below:

	September 30, 2011			December 31, 2010
	(in thousands)
Proved properties:
Leasehold acquisition	$	5,483,984		$	4,695,704
Development		1,262,251			840,175
Unproved properties		194,543			128,624
		6,940,778			5,664,503
Less accumulated depletion and amortization		(939,264	)		(719,035	)
	$	6,001,514		$	4,945,468