Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues:
Total operating revenues	$ 203,776	$ 217,631	$ 619,289	$ 651,247
Expenses:
Lease operating expenses	25,817	23,140	71,226	69,365
Facility lease expense	6,875	5,254	19,557	15,706
Production taxes	20,470	22,482	62,623	66,369
Gathering fees	21,810	22,182	69,046	63,753
Depletion, depreciation and amortization	49,672	41,089	151,954	111,516
General and administrative	1,482	8,247	16,233	34,308
Total operating expenses	126,126	122,394	390,639	361,017
Operating income	77,650	95,237	228,650	290,230
Other income (expense), net:
Interest expense	(38,382)	(210,107)	(111,934)	(324,979)
(Loss) gain on commodity derivatives	(21,804)	4,650	(75,607)	12,149
Deferred gain on sale of liquids gathering system	2,638	2,638	7,915	7,915
Contract settlement expense	(2,676)		(2,676)	(52,707)
Other income (expense), net	1,137	92	(404)	(28)
Total other (expense) income, net	(59,087)	(202,727)	(182,706)	(357,650)
Reorganization items, net		(227,123)		142,147
Income (loss) before income tax provision	18,563	(334,613)	45,944	74,727
Income tax (benefit) provision		(6,886)	442	(6,884)
Net income (loss)	$ 18,563	$ (327,727)	$ 45,502	$ 81,611
Basic earnings (loss) per share:
Net income (loss) per common share - basic	$ 0.09	$ (1.67)	$ 0.23	$ 0.53
Fully diluted earnings (loss) per share:
Net income (loss) per common share - fully diluted	$ 0.09	$ (1.67)	$ 0.23	$ 0.53
Weighted average common shares outstanding - basic	197,054	196,331	196,888	152,864
Weighted average common shares outstanding - fully diluted	197,055	196,331	197,288	153,068
Natural Gas Sales
Revenues:
Total operating revenues	$ 156,986	$ 182,949	$ 479,704	$ 551,797
Oil Sales
Revenues:
Total operating revenues	41,523	32,334	125,974	94,415
Other Revenues
Revenues:
Total operating revenues	$ 5,267	$ 2,348	$ 13,611	$ 5,035