Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2013

Supplemental Cash Flow Information

	Year Ended December 31,
	2013			2012			2011
	(in thousands)
Net cash provided from operating activities included:
Income taxes (refunded from) paid to taxing authorities	$	(347	)	$	386		$	675
Interest paid		159,137			153,249			133,103
Non-cash investing and financing activities included:
Asset retirement costs capitalized, net	$	76,373		$	57,982		$	24,061
Increase (decrease) in accrued capital expenditures		27,079			(94,121	)		86,561