Supplemental Cash Flow Information (Tables)

9 Months Ended

Sep. 30, 2015

Supplemental Cash Flow Elements [Abstract]

Supplemental Cash Flow Information

	Nine Months Ended September 30,
	2015			2014
	(in thousands)
Net cash provided from operating activities included:
Income taxes paid to taxing authorities	$	100		$	41
Interest paid		128,132			144,596
Non-cash investing and financing activities included:
Increase in asset retirement costs capitalized		19,862			7,815
(Decrease) increase in accrued capital expenditures		(195,472	)		41,707