Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidating Financial Information - Condensed Consolidating Balance Sheets (Details)

v3.5.0.2
Condensed Consolidating Financial Information - Condensed Consolidating Balance Sheets (Details) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Jun. 30, 2015
Dec. 31, 2014
Current assets:        
Cash and cash equivalents $ 396,437 $ 112,974 $ 525,488 $ 142,340
Accounts receivable—oil and gas 91,462 71,872    
Accounts receivable - related parties 23 16    
Accounts receivable - intercompany   0    
Prepaid expenses and other current assets 7,782 3,905    
Short-term derivative instruments 44,672 142,794    
Deferred Tax Assets, Net, Current 292 0    
Total current assets 540,668 331,561    
Property and equipment:        
Oil and natural gas properties 5,686,188 5,424,342    
Other property and equipment 48,107 33,171    
Accumulated depletion, depreciation, amortization and impairment (3,339,087) (2,829,110)    
Property and equipment, net 2,395,208 2,628,403    
Other assets:        
Equity investments 253,047 242,393    
Long-term derivative instruments 14,644 51,088    
Deferred tax asset 24,284 74,925    
Other assets 11,336 6,364    
Total other assets 303,311 374,770    
Total assets 3,239,187 3,334,734    
Current liabilities:        
Accounts payable and accrued liabilities 289,750 265,128    
Accounts payable - intercompany 0 0    
Asset retirement obligation—current 75 75 75  
Short-term derivative instruments 49,906 437    
Deferred tax liability 0 50,697    
Current maturities of long-term debt 0 179    
Total current liabilities 339,731 316,516    
Long-term derivative instrument 29,269 6,935    
Asset retirement obligation—long-term 29,993 26,362 21,202  
Asset retirement obligation - long-term   26,362    
Long-term debt 956,754 946,084    
Total liabilities 1,355,747 1,295,897    
Stockholders’ equity:        
Common stock 1,253 1,082    
Paid-in capital 3,242,404 2,824,303    
Accumulated other comprehensive (loss) income (46,803) (55,177)    
Retained (deficit) earnings (1,313,414) (731,371)    
Total stockholders’ equity 1,883,440 2,038,837 3,267,306 2,296,296
Total liabilities and stockholders’ equity 3,239,187 3,334,734    
Parent        
Current assets:        
Cash and cash equivalents 395,703 112,494 524,240 141,535
Accounts receivable—oil and gas 90,758 72,241    
Accounts receivable - related parties 23 16    
Accounts receivable - intercompany 355,924 326,475    
Prepaid expenses and other current assets 7,782 3,905    
Short-term derivative instruments 44,672 142,794    
Deferred Tax Assets, Net, Current 292      
Total current assets 895,154 657,925    
Property and equipment:        
Oil and natural gas properties 5,334,096 5,108,258    
Other property and equipment 48,064 33,128    
Accumulated depletion, depreciation, amortization and impairment (3,339,056) (2,829,081)    
Property and equipment, net 2,043,104 2,312,305    
Other assets:        
Equity investments 242,627 231,892    
Long-term derivative instruments 14,644 51,088    
Deferred tax asset 24,284 74,925    
Other assets 11,336 6,364    
Total other assets 292,891 364,269    
Total assets 3,231,149 3,334,499    
Current liabilities:        
Accounts payable and accrued liabilities 281,712 264,893    
Accounts payable - intercompany 0    
Asset retirement obligation—current 75 75    
Short-term derivative instruments 49,906 437    
Deferred tax liability   50,697    
Current maturities of long-term debt   179    
Total current liabilities 331,693 316,281    
Long-term derivative instrument 29,269 6,935    
Asset retirement obligation—long-term 29,993      
Asset retirement obligation - long-term   26,362    
Long-term debt 956,754 946,084    
Total liabilities 1,347,709 1,295,662    
Stockholders’ equity:        
Common stock 1,253 1,082    
Paid-in capital 3,242,404 2,824,303    
Accumulated other comprehensive (loss) income (46,803) (55,177)    
Retained (deficit) earnings (1,313,414) (731,371)    
Total stockholders’ equity 1,883,440 2,038,837    
Total liabilities and stockholders’ equity 3,231,149 3,334,499    
Guarantors        
Current assets:        
Cash and cash equivalents 733 479 1,247 804
Accounts receivable—oil and gas 7,721 54    
Accounts receivable - related parties 0 0    
Accounts receivable - intercompany 1,904 60    
Prepaid expenses and other current assets   0    
Short-term derivative instruments 0 0    
Deferred Tax Assets, Net, Current 0      
Total current assets 10,358 593    
Property and equipment:        
Oil and natural gas properties 352,821 316,813    
Other property and equipment 43 43    
Accumulated depletion, depreciation, amortization and impairment (31) (29)    
Property and equipment, net 352,833 316,827    
Other assets:        
Equity investments 25,441 0    
Long-term derivative instruments 0 0    
Deferred tax asset 0 0    
Other assets   0    
Total other assets 25,441      
Total assets 388,632 317,420    
Current liabilities:        
Accounts payable and accrued liabilities 16,768 527    
Accounts payable - intercompany 355,991 326,541    
Asset retirement obligation—current   0    
Short-term derivative instruments   0    
Deferred tax liability   0    
Current maturities of long-term debt   0    
Total current liabilities 372,759 327,068    
Long-term derivative instrument 0 0    
Asset retirement obligation—long-term 0      
Asset retirement obligation - long-term   0    
Long-term debt 0 0    
Total liabilities 372,759 327,068    
Stockholders’ equity:        
Common stock   0    
Paid-in capital 25,822 322    
Accumulated other comprehensive (loss) income   0    
Retained (deficit) earnings (9,949) (9,970)    
Total stockholders’ equity 15,873 (9,648)    
Total liabilities and stockholders’ equity 388,632 317,420    
Non-Guarantor        
Current assets:        
Cash and cash equivalents 1 1 1 1
Accounts receivable—oil and gas 0 0    
Accounts receivable - related parties 0 0    
Accounts receivable - intercompany 0 0    
Prepaid expenses and other current assets 0 0    
Short-term derivative instruments 0 0    
Deferred Tax Assets, Net, Current 0      
Total current assets 1 1    
Property and equipment:        
Oil and natural gas properties   0    
Other property and equipment   0    
Accumulated depletion, depreciation, amortization and impairment   0    
Property and equipment, net   0    
Other assets:        
Equity investments 49,557 50,644    
Long-term derivative instruments 0 0    
Deferred tax asset 0 0    
Other assets   0    
Total other assets 49,557 50,644    
Total assets 49,558 50,645    
Current liabilities:        
Accounts payable and accrued liabilities   0    
Accounts payable - intercompany 125 124    
Asset retirement obligation—current   0    
Short-term derivative instruments   0    
Deferred tax liability   0    
Current maturities of long-term debt   0    
Total current liabilities 125 124    
Long-term derivative instrument 0 0    
Asset retirement obligation—long-term 0      
Asset retirement obligation - long-term   0    
Long-term debt 0 0    
Total liabilities 125 124    
Stockholders’ equity:        
Common stock   0    
Paid-in capital 255,244 241,553    
Accumulated other comprehensive (loss) income (45,507) (55,177)    
Retained (deficit) earnings (160,304) (135,855)    
Total stockholders’ equity 49,433 50,521    
Total liabilities and stockholders’ equity 49,558 50,645    
Eliminations        
Current assets:        
Cash and cash equivalents 0 0 $ 0 $ 0
Accounts receivable—oil and gas (7,017) (423)    
Accounts receivable - related parties 0 0    
Accounts receivable - intercompany (357,828) (326,535)    
Prepaid expenses and other current assets   0    
Short-term derivative instruments 0 0    
Deferred Tax Assets, Net, Current 0      
Total current assets (364,845) (326,958)    
Property and equipment:        
Oil and natural gas properties (729) (729)    
Other property and equipment   0    
Accumulated depletion, depreciation, amortization and impairment   0    
Property and equipment, net (729) (729)    
Other assets:        
Equity investments (64,578) (40,143)    
Long-term derivative instruments 0 0    
Deferred tax asset 0 0    
Other assets   0    
Total other assets (64,578) (40,143)    
Total assets (430,152) (367,830)    
Current liabilities:        
Accounts payable and accrued liabilities (8,730) (292)    
Accounts payable - intercompany (356,116) (326,665)    
Asset retirement obligation—current   0    
Short-term derivative instruments   0    
Deferred tax liability   0    
Current maturities of long-term debt   0    
Total current liabilities (364,846) (326,957)    
Long-term derivative instrument 0 0    
Asset retirement obligation—long-term 0      
Asset retirement obligation - long-term   0    
Long-term debt 0 0    
Total liabilities (364,846) (326,957)    
Stockholders’ equity:        
Common stock   0    
Paid-in capital (281,066) (241,875)    
Accumulated other comprehensive (loss) income 45,507 55,177    
Retained (deficit) earnings 170,253 145,825    
Total stockholders’ equity (65,306) (40,873)    
Total liabilities and stockholders’ equity $ (430,152) $ (367,830)