Supplemental Disclosures of Cash Flow Information (Tables)

9 Months Ended

Sep. 30, 2012

Supplemental Disclosures of Cash Flow Information [Abstract]

Schedule of Supplemental Disclosures of Cash Flow Information

	For the three months ended				For the nine months ended
	September 30,				September 30,
	2012		2011		2012		2011
	(in thousands)
Cash paid during the year for interest	$	45,667	$	25,897	$	75,487	$	57,745
Cash paid during the year for income taxes		400		3,391		468		20,391
Noncash property changes		(55,729)		(46,792)		(34,940)		16,078