CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash flows from operating activities
Net income (loss)	$ (111,394)	$ 8,102
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, depletion and amortization	253,056	215,623
Impairments	1,084	123,992
Accretion of firm transportation obligation	705	991
Derivative contracts:
Net gains	(52,073)	(8,130)
Cash settlements, net	104,590	(17,836)
Deferred income tax expense (benefit)	266	(339)
Gain on sales of assets, net	(50,803)	(120,295)
Non-cash exploration expense	4,903	8,387
Non-cash interest expense	3,504	3,114
Share-based compensation (equity-classified)	3,369	2,638
Other, net	(17)	325
Changes in operating assets and liabilities, net	5,051	(16,122)
Net cash provided by operating activities	162,241	200,450
Cash flows from investing activities
Receipts to settle working capital adjustments assumed in acquisition, net	0	33,712
Capital expenditures – property and equipment	(324,876)	(545,031)
Proceeds from sales of assets, net	73,670	311,913
Net cash used in investing activities	(251,206)	(199,406)
Cash flows from financing activities
Proceeds from issuance of preferred stock, net	0	313,330
Payments made to induce conversion of preferred stock	0	(4,256)
Proceeds from revolving credit facility borrowings	203,000	377,000
Repayment of revolving credit facility borrowings	(98,000)	(583,000)
Debt issuance costs paid	(744)	(151)
Dividends paid on preferred stock	(18,201)	(5,165)
Other, net	0	1,414
Net cash provided by financing activities	86,055	99,172
Net (decrease) increase in cash and cash equivalents	(2,910)	100,216
Cash and cash equivalents – beginning of period	6,252	23,474
Cash and cash equivalents – end of period	3,342	123,690
Cash paid for:
Interest	47,489	47,778
Income taxes	7	100
Non-cash Investing activities:
Changes in accrued liabilities related to capital expenditures	$ (41,800)	$ 12,805