Annual report pursuant to Section 13 and 15(d)

Condensed Consolidating Financial Information - Balance Sheets (Details)

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Condensed Consolidating Financial Information - Balance Sheets (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Current assets:        
Cash and cash equivalents $ 6,060 $ 52,297    
Accounts receivable—oil and natural gas sales 121,210 210,200    
Accounts receivable - joint interest and other 47,975 22,497    
Accounts receivable - intercompany 0 0    
Prepaid expenses and other current assets 4,431 10,017    
Total short-term derivative instruments – asset 126,201 21,352    
Total current assets 305,877 316,363    
Property and equipment:        
Oil and natural gas properties, full-cost accounting 10,595,735 10,026,836    
Other property and equipment 96,719 92,667    
Accumulated depletion, depreciation, amortization and impairment (7,228,660) (4,640,098)    
Property and equipment, net 3,463,794 5,479,405    
Other assets:        
Equity investments and investments in subsidiaries 32,044 236,121    
Long-term derivative instruments 563 0    
Deferred tax asset 7,563 0    
Inventories 5,182 5,344    
Operating lease assets 14,168 0    
Operating lease assets - related parties 43,270 0    
Other assets 10,358 13,803    
Total other assets 113,148 255,268    
Total assets 3,882,819 6,051,036    
Current liabilities:        
Accounts payable and accrued liabilities 415,218 518,380    
Accounts payable - intercompany 0 0    
Short-term derivative instruments 303 20,401    
Current portion of operating lease liabilities 13,826 0    
Current portion of operating lease liabilities - related parties 21,220 0    
Current maturities of long-term debt 631 651    
Total current liabilities 451,198 539,432    
Long-term derivative instruments 53,135 13,992    
Asset retirement obligation—long-term 60,355 79,952    
Uncertain tax position liability 3,127 3,127    
Non-current operating lease liabilities 342 0    
Non-current operating lease liabilities - related parties 22,050 0    
Long-term debt, net of current maturities 1,978,020 2,086,765    
Total liabilities 2,568,227 2,723,268    
Stockholders’ equity:        
Common stock 1,597 1,630    
Paid-in capital 4,207,554 4,227,532    
Accumulated other comprehensive loss (46,833) (56,026)    
Accumulated deficit (2,847,726) (845,368)    
Total stockholders’ equity 1,314,592 3,327,768 $ 3,101,614 $ 2,183,892
Total liabilities and stockholders’ equity 3,882,819 6,051,036    
Eliminations        
Current assets:        
Cash and cash equivalents 0 0    
Accounts receivable—oil and natural gas sales   0    
Accounts receivable - joint interest and other 0 0    
Accounts receivable - intercompany (1,908,816) (991,097)    
Prepaid expenses and other current assets 0 0    
Total short-term derivative instruments – asset 0 0    
Total current assets (1,908,816) (991,097)    
Property and equipment:        
Oil and natural gas properties, full-cost accounting (729) (729)    
Other property and equipment 0 0    
Accumulated depletion, depreciation, amortization and impairment 0 0    
Property and equipment, net (729) (729)    
Other assets:        
Equity investments and investments in subsidiaries (3,059,791) (2,665,126)    
Long-term derivative instruments 0      
Deferred tax asset 0      
Inventories 0 0    
Operating lease assets 0      
Operating lease assets - related parties 0      
Other assets 1    
Total other assets (3,059,791) (2,665,125)    
Total assets (4,969,336) (3,656,951)    
Current liabilities:        
Accounts payable and accrued liabilities   0    
Accounts payable - intercompany (1,908,817) (991,097)    
Short-term derivative instruments 0 0    
Current portion of operating lease liabilities 0      
Current portion of operating lease liabilities - related parties 0      
Current maturities of long-term debt 0 0    
Total current liabilities (1,908,817) (991,097)    
Long-term derivative instruments 0 0    
Asset retirement obligation—long-term 0 0    
Uncertain tax position liability 0 0    
Non-current operating lease liabilities 0      
Non-current operating lease liabilities - related parties 0      
Long-term debt, net of current maturities 0 0    
Total liabilities (1,908,817) (991,097)    
Stockholders’ equity:        
Common stock 0 0    
Paid-in capital (4,438,965) (2,177,224)    
Accumulated other comprehensive loss 44,763 53,783    
Accumulated deficit 1,333,683 (542,413)    
Total stockholders’ equity (3,060,519) (2,665,854)    
Total liabilities and stockholders’ equity (4,969,336) (3,656,951)    
Parent        
Current assets:        
Cash and cash equivalents 2,768 25,585    
Accounts receivable—oil and natural gas sales 859 146,075    
Accounts receivable - joint interest and other 5,279 16,212    
Accounts receivable - intercompany 1,065,593 671,633    
Prepaid expenses and other current assets 4,047 7,843    
Total short-term derivative instruments – asset 126,201 21,352    
Total current assets 1,204,747 888,700    
Property and equipment:        
Oil and natural gas properties, full-cost accounting 1,314,933 7,044,550    
Other property and equipment 92,650 91,916    
Accumulated depletion, depreciation, amortization and impairment (1,418,888) (4,640,059)    
Property and equipment, net (11,305) 2,496,407    
Other assets:        
Equity investments and investments in subsidiaries 3,064,503 2,856,988    
Long-term derivative instruments 563      
Deferred tax asset 7,563      
Inventories 0 4,210    
Operating lease assets 14,168      
Operating lease assets - related parties 43,270      
Other assets 10,026 12,624    
Total other assets 3,140,093 2,873,822    
Total assets 4,333,535 6,258,929    
Current liabilities:        
Accounts payable and accrued liabilities 48,006 419,107    
Accounts payable - intercompany 878,283 320,259    
Short-term derivative instruments 303 20,401    
Current portion of operating lease liabilities 13,826      
Current portion of operating lease liabilities - related parties 21,220      
Current maturities of long-term debt 631 651    
Total current liabilities 962,269 760,418    
Long-term derivative instruments 53,135 13,992    
Asset retirement obligation—long-term 0 66,859    
Uncertain tax position liability 3,127 3,127    
Non-current operating lease liabilities 342      
Non-current operating lease liabilities - related parties 22,050      
Long-term debt, net of current maturities 1,978,020 2,086,765    
Total liabilities 3,018,943 2,931,161    
Stockholders’ equity:        
Common stock 1,597 1,630    
Paid-in capital 4,207,554 4,227,532    
Accumulated other comprehensive loss (46,833) (56,026)    
Accumulated deficit (2,847,726) (845,368)    
Total stockholders’ equity 1,314,592 3,327,768    
Total liabilities and stockholders’ equity 4,333,535 6,258,929    
Guarantors        
Current assets:        
Cash and cash equivalents 3,097 26,711    
Accounts receivable—oil and natural gas sales 120,351 64,125    
Accounts receivable - joint interest and other 42,696 6,285    
Accounts receivable - intercompany 843,223 319,464    
Prepaid expenses and other current assets 308 2,174    
Total short-term derivative instruments – asset 0 0    
Total current assets 1,009,675 418,759    
Property and equipment:        
Oil and natural gas properties, full-cost accounting 9,273,681 2,983,015    
Other property and equipment 50 751    
Accumulated depletion, depreciation, amortization and impairment (5,808,254) (39)    
Property and equipment, net 3,465,477 2,983,727    
Other assets:        
Equity investments and investments in subsidiaries 6,332 0    
Long-term derivative instruments 0      
Deferred tax asset 0      
Inventories 5,182 1,134    
Operating lease assets 0      
Operating lease assets - related parties 0      
Other assets 332 1,178    
Total other assets 11,846 2,312    
Total assets 4,486,998 3,404,798    
Current liabilities:        
Accounts payable and accrued liabilities 367,088 99,273    
Accounts payable - intercompany 1,026,249 670,708    
Short-term derivative instruments 0 0    
Current portion of operating lease liabilities 0      
Current portion of operating lease liabilities - related parties 0      
Current maturities of long-term debt 0 0    
Total current liabilities 1,393,337 769,981    
Long-term derivative instruments 0 0    
Asset retirement obligation—long-term 58,322 13,093    
Uncertain tax position liability 0 0    
Non-current operating lease liabilities 0      
Non-current operating lease liabilities - related parties 0      
Long-term debt, net of current maturities 0 0    
Total liabilities 1,451,659 783,074    
Stockholders’ equity:        
Common stock 0 0    
Paid-in capital 4,171,408 1,915,598    
Accumulated other comprehensive loss 0 0    
Accumulated deficit (1,136,069) 706,126    
Total stockholders’ equity 3,035,339 2,621,724    
Total liabilities and stockholders’ equity 4,486,998 3,404,798    
Non-Guarantor        
Current assets:        
Cash and cash equivalents 195 1    
Accounts receivable—oil and natural gas sales 0 0    
Accounts receivable - joint interest and other 0 0    
Accounts receivable - intercompany 0 0    
Prepaid expenses and other current assets 76 0    
Total short-term derivative instruments – asset 0 0    
Total current assets 271 1    
Property and equipment:        
Oil and natural gas properties, full-cost accounting 7,850 0    
Other property and equipment 4,019 0    
Accumulated depletion, depreciation, amortization and impairment (1,518) 0    
Property and equipment, net 10,351 0    
Other assets:        
Equity investments and investments in subsidiaries 21,000 44,259    
Long-term derivative instruments 0      
Deferred tax asset 0      
Inventories 0 0    
Operating lease assets 0      
Operating lease assets - related parties 0      
Other assets 0    
Total other assets 21,000 44,259    
Total assets 31,622 44,260    
Current liabilities:        
Accounts payable and accrued liabilities 124 0    
Accounts payable - intercompany 4,285 130    
Short-term derivative instruments 0 0    
Current portion of operating lease liabilities 0      
Current portion of operating lease liabilities - related parties 0      
Current maturities of long-term debt 0 0    
Total current liabilities 4,409 130    
Long-term derivative instruments 0 0    
Asset retirement obligation—long-term 2,033 0    
Uncertain tax position liability 0 0    
Non-current operating lease liabilities 0      
Non-current operating lease liabilities - related parties 0      
Long-term debt, net of current maturities 0 0    
Total liabilities 6,442 130    
Stockholders’ equity:        
Common stock 0 0    
Paid-in capital 267,557 261,626    
Accumulated other comprehensive loss (44,763) (53,783)    
Accumulated deficit (197,614) (163,713)    
Total stockholders’ equity 25,180 44,130    
Total liabilities and stockholders’ equity $ 31,622 $ 44,260