Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Current assets
Cash	$ 22,698	$ 13,566
Restricted cash	277	149
Accounts receivable, net
Oil and gas sales	26,610	51,482
Joint interest owners	13,978	41,761
Other	13,932	12,512
Commodity derivative assets	117,186	121,519
Other current assets	2,498	3,374
Total current assets	197,179	244,363
Oil and gas properties, net, at cost under the successful efforts method	1,665,732	1,638,860
Other property, plant and equipment, net	4,136	4,048
Commodity derivative assets	95,102	87,055
Other assets	18,751	20,352
Deferred tax assets	1,135	171
Total assets	1,982,035	1,994,849
Current liabilities
Trade accounts payable	47,300	136,337
Oil and gas sales payable	42,145	70,469
Accrued liabilities	32,182	19,401
Commodity derivative liabilities	20
Deferred tax liabilities	470	718
Asset retirement obligations	3,311	3,074
Total current liabilities	125,428	229,999
Long-term debt	100,000	360,000
Senior notes	737,487	500,000
Deferred revenue	11,856	13,377
Commodity derivative liabilities		28
Asset retirement obligations	12,260	10,536
Liability under tax receivable agreement	40,009	803
Deferred tax liabilities	21,896	26,756
Total liabilities	$ 1,048,936	$ 1,141,499
Commitments and contingencies (Note 8)
Stockholders' equity
Treasury stock	$ (358)	$ (358)
Additional paid-in-capital	361,355	178,763
Retained earnings	35,933	38,950
Stockholders' equity	396,992	217,405
Non-controlling interest	536,107	635,945
Total stockholders' equity	933,099	853,350
Total liabilities and stockholders' equity	1,982,035	1,994,849
Class A common stock
Stockholders' equity
Common stock	31	13
Class B common stock
Stockholders' equity
Common stock	$ 31	$ 37