Supplemental Disclosures of Cash Flow Information (Tables)

6 Months Ended

Jun. 30, 2013

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,
	2013		2012		2013		2012
	(in thousands)
Cash paid for interest	$	5,875	$	3,368	$	50,218	$	29,820
Cash paid for income taxes		965		–		17,306		68
Noncash property changes		10,325		3,220		46,182		20,789