Property, Plant And Equipment (Tables)

9 Months Ended

Sep. 30, 2011

Property, Plant And Equipment [Abstract]

Property, Plant And Equipment

	September 30,			December 31,
	2011			2010
	(In thousands)
Oil and gas properties
Subject to depletion	$	5,049,640		$	4,805,161
Unevaluated costs		460,158			304,269
Accumulated depletion		(2,440,846	)		(2,274,785	)
Net oil and gas properties		3,068,952			2,834,645
Other plant and equipment
Pipelines and processing facilities		355,201			235,676
General properties		73,530			70,267
Accumulated depreciation		(120,878	)		(72,743	)
Net other plant and equipment		307,853			233,200
Property, plant and equipment, net of accumulated depletion and depreciation	$	3,376,805		$	3,067,845