Supplemental Cash Flow Information (Tables)

3 Months Ended

Mar. 31, 2020

Supplemental Cash Flow Elements [Abstract]

Summary of Supplemental Cash Flow Information

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. 

	Three months ended March 31,
In thousands	2020		2019
Supplemental cash flow information:
Cash paid for interest	$	51,111	$	61,964
Cash paid for income taxes	8		9
Cash received for income tax refunds (1)	9,485		4
Non-cash investing activities:
Asset retirement obligation additions and revisions, net	2,508		2,570