Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2014

Supplemental Cash Flow Information [Abstract]

Schedule of Cash Flow, Supplemental Disclosure

Supplemental Cash Flow Information

	Year Ended December 31,
In thousands	2014			2013			2012
Supplemental cash flow information
Cash paid for interest, expensed	$	185,140		$	117,442		$	137,950
Cash paid for interest, capitalized	24,202			79,253			77,432
Cash paid for income taxes	5,033			28,895			99,194
Cash received from income tax refunds	(13,193		)	(17,087		)	(38,004		)
Noncash investing activities
Increase in asset retirement obligations	6,500			26,946			56,290
Increase (decrease) in liabilities for capital expenditures	215			(18,321		)	(26,882		)
Increase in restricted cash (1)	—			—			1,262,559
Decrease in restricted cash (2)	—			1,050,328			212,544

(1) During 2012, $212.5 million of proceeds from the sale of certain non-core assets in the Gulf Coast Region and $1.05 billion of the cash proceeds from the Bakken Exchange Transaction were paid by the respective purchaser directly to a qualified intermediary to facilitate a like-kind-exchange transaction for federal income tax purposes.

(2) During 2012 and 2013, proceeds from the sales of our oil and natural gas property dispositions in 2012, which were held by a qualified intermediary, were released in 2012 to fund the Thompson Field acquisition and in 2013 primarily to fund a portion of the CCA acquisition and certain post-closing costs under the Bakken Exchange Transaction.