Supplemental Cash Flow Information

6 Months Ended

Jun. 30, 2018

Supplemental Cash Flow Elements [Abstract]

The following table discloses supplemental cash flow information about cash paid for interest and income tax payments and refunds. Also disclosed is information about investing activities that affects recognized assets and liabilities but does not result in cash receipts or payments.



	Six months ended June 30,
In thousands	2018		2017
Supplemental cash flow information:
Cash paid for interest	$	122,940	$	138,346
Cash paid for income taxes	—		2
Cash received for income tax refunds	5		148
Non-cash investing activities:
Asset retirement obligation additions and revisions, net	3,562		3,771

As of June 30, 2018 and December 31, 2017, the Company had $317.5 million and $302.8 million, respectively, of accrued capital expenditures included in “Net property and equipment” and “Accounts payable trade” in the condensed consolidated balance sheets.