Supplemental Cash Flow Information

9 Months Ended

Sep. 30, 2013

Supplemental Cash Flow Elements [Abstract]

Supplemental Cash Flow Information

Supplemental Cash Flow Information

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

	Nine months ended September 30,
In thousands	2013			2012
Supplemental cash flow information:
Cash paid for interest	$	139,023		$	67,638
Cash paid for income taxes	23,413			759
Cash received for income tax refunds	(173		)	(72		)
Non-cash investing activities:
Increase in accrued capital expenditures	69,767			4,521
Acquisition of assets through issuance of common stock	—			176,563
Asset retirement obligations, net	5,043			4,910