Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Operating revenues
Oil and gas sales		$ 48,114	$ 28,398	$ 88,791	$ 53,478
Other revenues		512	746	1,068	1,524
Total operating revenues		48,626	29,144	89,859	55,002
Operating costs and expenses
Lease operating		9,425	7,545	18,231	16,162
Production and ad valorem taxes		2,790	1,727	1,884	3,328
Exploration		6,725	77	9,669	239
Depletion, depreciation and amortization		45,336	38,137	80,990	79,899
Impairment of oil and gas properties		161,886		161,886
Accretion of ARO liability		266	297	467	590
General and administrative		8,633	8,126	16,674	15,630
Total operating expenses		235,061	55,909	289,801	115,848
Operating income (loss)		(186,435)	(26,765)	(199,942)	(60,846)
Other income (expense)
Interest expense		(12,677)	(12,807)	(25,564)	(27,605)
Gain on debt extinguishment			8,878		99,530
Net gain (loss) on commodity derivatives		21,527	(40,002)	43,847	(22,783)
Other income (expense)		29,834	(338)	30,414	(113)
Other income (expense), net		38,684	(44,269)	48,697	49,029
Income (loss) before income tax		(147,751)	(71,034)	(151,245)	(11,817)
Income tax provision (benefit)		(2,419)	(12,388)	(2,398)	(1,685)
Net income (loss)		(145,332)	(58,646)	(148,847)	(10,132)
Net income (loss) attributable to non-controlling interests		(56,093)	(35,401)	(58,221)	(5,798)
Net income (loss) attributable to controlling interests		(89,239)	(23,245)	(90,626)	(4,334)
Dividends and accretion on preferred stock		(1,966)		(3,993)
Net income (loss) attributable to common shareholders		$ (91,205)	$ (23,245)	$ (94,619)	$ (4,334)
Earnings (loss) per share:
Basic - Net income (loss) attributable to common shareholders (in dollars per share)	[1]	$ (1.39)	$ (0.69)	$ (1.48)	$ (0.13)
Diluted - Net income (loss) attributable to common shareholders (in dollars per share)	[1]	$ (1.39)	$ (0.69)	$ (1.48)	$ (0.13)
Weighted average Class A shares outstanding:
Basic (in shares)	[1]	65,681	33,598	63,948	33,410
Diluted (in shares)	[1]	65,681	33,598	63,948	33,410

[1] All share and earnings per share information presented has been recast to retrospectively adjust for the effects of the 0.087423 per share Special Stock Dividend, as defined in Note 11, “Stockholders’ and Mezzanine equity”, distributed on March 31, 2017.