Supplemental Cash Flow Information (Tables)

6 Months Ended

Jun. 30, 2012

Supplemental Cash Flow Elements [Abstract]

Supplemental Cash Flow Information

	Six Months Ended June 30,
	2012		2011
	(in thousands)
Net cash provided from operating activities included:
Income taxes paid to taxing authorities	$	246	$	308
Interest paid		66,438		68,002
Non-cash investing and financing activities included:
Asset retirement costs capitalized, net		4,004		12,717