Oil and Natural Gas Capitalized Costs

6 Months Ended

Jun. 30, 2011

Notes To Financial Statements [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:

	June 30, 2011			December 31, 2010
	(in thousands)
Proved properties:
Leasehold acquisition	$	5,505,535		$	4,695,704
Development		1,066,039			840,175
Unproved properties		169,093			128,624
		6,740,667			5,664,503
Less accumulated depletion and amortization		(855,314	)		(719,035	)
	$	5,885,353		$	4,945,468