Additional Balance Sheet Details (Tables)

6 Months Ended

Jun. 30, 2015

Table Text Block [Abstract]

Trade Accounts Receivable, net

Trade Accounts Receivable, net

	June 30,		December 31,
In thousands	2015		2014
Trade accounts receivable, net	$	43,291	$	45,407
Commodity derivatives settlement receivables	38,896		59,755
Federal income tax receivable, net	—		37,652
Other receivables	16,670		14,141
Total	$	98,857	$	156,955

Accounts Payable and Accrued Liabilities

Accounts Payable and Accrued Liabilities

	June 30,		December 31,
In thousands	2015		2014
Accrued interest	$	48,802	$	48,255
Accrued lease operating expenses	36,029		56,798
Accrued compensation	33,702		62,513
Accounts payable	31,805		64,604
Taxes payable	30,654		39,816
Accrued exploration and development costs	19,590		90,939
Other	28,360		31,833
Total	$	228,942	$	394,758