Supplemental Cash Flow Information (Tables)

9 Months Ended

Sep. 30, 2011

Supplemental Cash Flow Elements [Abstract]

Supplemental Cash Flow Information

	Nine Months Ended
	September 30,
	2011		2010
	(in thousands)
Non-cash investing and financing activities included:
Asset retirement costs capitalized, net	$	13,569	$	1,229
Unproved property purchased with stock (a)		—		20,000
Net cash provided from operating activities included:
Interest paid	$	95,536	$	74,732
Income taxes paid (refunded)		309		(807	)

^(a) Nine months ended September 30, 2010 included shares that were issued in January 2010 while the value was accrued and included in costs incurred for the year ended December 31, 2009.