Supplemental Disclosures of Cash Flow Information (Tables)

6 Months Ended

Jun. 30, 2012

Supplemental Disclosures of Cash Flow Information [Abstract]

Schedule of Supplemental Disclosures of Cash Flow Information

	For the three months ended				For the six months ended
	June 30,				June 30,
	2012		2011		2012		2011
	(in thousands)
Cash paid during the year for interest	$	3,368	$	6,991	$	29,820	$	31,848
Cash paid during the year for income taxes		–		1,000		68		17,000
Noncash property additions		3,220		58,741		20,789		62,870