Supplemental Cash Flow Information

12 Months Ended

Dec. 31, 2018

Supplemental Cash Flow Information [Abstract]

Cash Flow, Supplemental Disclosure

Note 14. Supplemental Cash Flow Information

Supplemental Cash Flow Information

	Year Ended December 31,
In thousands	2018			2017			2016
Supplemental cash flow information
Cash paid for interest, expensed	$	50,076		$	98,261		$	130,843
Cash paid for interest, capitalized	37,079			30,762			25,982
Cash paid for interest, treated as a reduction of debt	79,606			50,349			25,835
Cash paid for income taxes	492			450			375
Cash received from income tax refunds	(8,280		)	(13,323		)	(2,455		)
Noncash investing and financing activities
Increase in asset retirement obligations	4,499			9,565			11,621
Increase (decrease) in liabilities for capital expenditures	14,600			3,930			(13,593		)
Conversion of convertible senior notes into common stock	162,004			—			—
Retirement of treasury stock	—			46,562			—