Consolidated Balance Sheets - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Current assets        
Cash $ 34,642 $ 21,893    
Accounts receivable, net        
Oil and gas sales 26,568 19,292    
Joint interest owners 5,267 11,314    
Other 6,061 15,170    
Commodity derivative assets 24,100 124,207    
Other current assets 2,684 2,298    
Total current assets 99,322 194,174    
Oil and gas properties, net, at cost under the successful efforts method 1,743,588 1,635,766    
Other property, plant and equipment, net 2,996 3,873    
Commodity derivative assets 34,744 93,302    
Other assets 6,050 8,039    
Total assets 1,886,700 1,935,154    
Current liabilities        
Trade accounts payable 36,527 7,467    
Oil and gas sales payable 28,339 32,408    
Accrued liabilities 25,707 27,011    
Commodity derivative liabilities 14,650 11    
Other current liabilities 2,584 679    
Total current liabilities 107,807 67,576    
Long-term debt 724,009 837,654    
Deferred revenue 7,049 11,417    
Commodity derivative liabilities 1,209      
Asset retirement obligations 19,458 20,301    
Liability under tax receivable agreement 43,045 38,052    
Other liabilities 792 330    
Deferred tax liabilities 2,905 22,972    
Total liabilities 906,274 998,302    
Mezzanine equity        
Series A preferred stock, $0.001 par value; 1,840,000 shares issued and outstanding at December 31, 2016 and no shares issued and outstanding at December 31, 2015 88,975      
Stockholders' equity        
Treasury stock, at cost: 22,602 shares at December 31, 2016 and December 31, 2015 (358) (358)    
Additional paid-in-capital 447,137 363,723    
Retained (deficit) / earnings (8,652) 36,569    
Stockholders' equity 438,214 399,996    
Non-controlling interest 453,237 536,856    
Total stockholders' equity 891,451 936,852 $ 853,350 $ 624,124
Total liabilities and stockholders' equity 1,886,700 1,935,154    
Class A common stock        
Current liabilities        
Total liabilities   998,302    
Stockholders' equity        
Common stock 57 31    
Class B common stock        
Stockholders' equity        
Common stock $ 30 $ 31