Additional Balance Sheet Details (Tables)

12 Months Ended

Dec. 31, 2015

Text Block [Abstract]

Trade and Other Receivables, Net

Trade and Other Receivables, Net

	December 31,
In thousands	2015		2014
Trade accounts receivable, net	$	40,146	$	45,407
Commodity derivatives settlement receivables	25,994		59,755
Federal income tax receivable, net	—		37,652
Other receivables	20,953		14,141
Total	$	87,093	$	156,955

Accounts Payable and Accrued Liabilities

Accounts Payable and Accrued Liabilities

	December 31,
In thousands	2015		2014
Accrued interest	$	48,908	$	48,255
Accrued compensation	46,780		62,513
Accrued lease operating expenses	37,549		56,798
Taxes payable	32,438		39,816
Accounts payable	30,477		64,604
Accrued exploration and development costs	20,892		90,939
Other	36,153		31,833
Total	$	253,197	$	394,758