Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Operating revenues
Revenues	$ 57,489	$ 41,233
Operating costs and expenses
Lease operating	10,229	8,806
Production and ad valorem taxes	2,751	(906)
Transportation and processing costs	706
Exploration	3,299	2,944
Depletion, depreciation and amortization	41,441	35,654
Accretion of ARO liability	251	201
General and administrative	7,570	8,041
Total operating expenses	66,247	54,740
Operating income (loss)	(8,758)	(13,507)
Other income (expense)
Interest expense	(21,862)	(12,887)
Net gain (loss) on commodity derivatives	(9,022)	22,320
Other income (expense)	7,730	580
Other income (expense), net	(23,154)	10,013
Income (loss) before income tax	(31,912)	(3,494)
Income tax provision (benefit)	(2,992)	21
Net income (loss)	(28,920)	(3,515)
Net income (loss) attributable to non-controlling interests	(3,559)	(2,128)
Net income (loss) attributable to controlling interests	(25,361)	(1,387)
Dividends and accretion on preferred stock	(1,968)	(2,027)
Net income (loss) attributable to common shareholders	$ (27,329)	$ (3,414)
Earnings (loss) per share:
Basic - Net income (loss) attributable to common shareholders (in dollars per share)	$ (0.30)	$ (0.05)
Diluted - Net income (loss) attributable to common shareholders (in dollars per share)	$ (0.30)	$ (0.05)
Weighted average Class A shares outstanding:
Basic (in shares)	91,064	62,197
Diluted (in shares)	91,064	62,197
Oil and Gas
Operating revenues
Revenues	$ 58,138	$ 40,677
Other revenues
Operating revenues
Revenues	$ (649)	$ 556