Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets
Cash	$ 8,708	$ 34,642
Accounts receivable, net
Oil and gas sales	25,787	26,568
Joint interest owners	6,533	5,267
Other	4,218	6,061
Commodity derivative assets	30,101	24,100
Other current assets	7,278	2,684
Total current assets	82,625	99,322
Oil and gas properties, net, at cost under the successful efforts method	1,764,947	1,743,588
Other property, plant and equipment, net	2,920	2,996
Commodity derivative assets	17,767	34,744
Other assets	5,762	6,050
Total assets	1,874,021	1,886,700
Current liabilities
Trade accounts payable	55,757	36,527
Oil and gas sales payable	28,112	28,339
Accrued liabilities	24,948	25,707
Commodity derivative liabilities	8,717	14,650
Other current liabilities	3,223	2,584
Total current liabilities	120,757	107,807
Long-term debt	701,586	724,009
Deferred revenue	6,591	7,049
Commodity derivative liabilities	178	1,209
Asset retirement obligations	20,035	19,458
Liability under tax receivable agreement	41,720	43,045
Other liabilities	949	792
Deferred tax liabilities	2,926	2,905
Total liabilities	894,742	906,274
Commitments and contingencies (Note 14)
Mezzanine equity
Series A preferred stock, $0.001 par value; [0,000,000] shares issued and outstanding at March 31, 2017 and 1,840,000 shares issued and outstanding at December 31, 2016	89,162	88,975
Stockholders' equity
Treasury stock, at cost: 22,602 shares at March 31, 2017 and December 31, 2016	(358)	(358)
Additional paid-in-capital	470,107	447,137
Retained (deficit) / earnings	(30,272)	(8,652)
Stockholders' equity	439,570	438,214
Non-controlling interest	450,547	453,237
Total stockholders' equity	890,117	891,451
Total liabilities and stockholders' equity	1,874,021	1,886,700
Class A common stock
Stockholders' equity
Common stock	63	57
Class B common stock
Stockholders' equity
Common stock	$ 30	$ 30