Quarterly report pursuant to Section 13 or 15(d)

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

v2.4.0.8
Condensed Consolidating Financial Information - Condensed Consolidating Balance Sheets (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Sep. 30, 2012
Dec. 31, 2011
Current assets:        
Cash and cash equivalents $ 95,466 $ 167,088 $ 12,280 $ 93,897
Accounts receivable—oil and gas 47,673 25,615    
Accounts receivable-related parties 29,797 34,848    
Accounts receivable - intercompany    0    
Prepaid expenses and other current assets 4,634 1,506    
Deferred tax asset 787 0    
Short-term derivative instruments 1,633 664    
Note receivable - related party 875 0    
Total current assets 180,865 229,721    
Property and equipment:        
Oil and natural gas properties, full-cost accounting 2,253,605 1,611,090    
Other property and equipment 10,164 8,662    
Accumulated depletion, depreciation, amortization and impairment (747,698) (665,884)    
Property and equipment, net 1,516,071 953,868    
Other assets:        
Equity investments 500,679 381,484    
Derivative instruments 127 0    
Other assets 12,827 13,295    
Total other assets 513,633 394,779    
Total assets 2,210,569 1,578,368    
Current liabilities:        
Accounts payable and accrued liabilities 179,357 110,244    
Accounts payable - intercompany 0 0    
Asset retirement obligation—current 780 60 60  
Short-term derivative instruments 4,808 10,442    
Current maturities of long-term debt 156 150    
Total current liabilities 185,101 120,896    
Long-term derivative instrument 962 0    
Asset retirement obligation—long-term 13,988 13,215 13,831  
Deferred tax liability 93,957 18,607    
Long-term debt, net of current maturities 298,992 298,888    
Other non-current liabilities 0 354    
Total liabilities 593,000 451,960    
Stockholders’ equity:        
Common stock 775 674    
Paid-in capital 1,399,803 1,036,245    
Accumulated other comprehensive loss (4,841) (3,429)    
Retained earnings (accumulated deficit) 221,832 92,918    
Total stockholders’ equity 1,617,569 1,126,408 680,627 632,350
Total liabilities and stockholders’ equity 2,210,569 1,578,368    
Parent [Member]
        
Current assets:        
Cash and cash equivalents 93,996 165,293 11,677 93,124
Accounts receivable—oil and gas 47,143 25,070    
Accounts receivable-related parties 26,421 33,806    
Accounts receivable - intercompany 18,419 15,368    
Prepaid expenses and other current assets 4,634 1,506    
Deferred tax asset 787      
Short-term derivative instruments 1,633 664    
Note receivable - related party 875      
Total current assets 193,908 241,707    
Property and equipment:        
Oil and natural gas properties, full-cost accounting 2,247,150 1,606,172    
Other property and equipment 10,135 8,642    
Accumulated depletion, depreciation, amortization and impairment (747,677) (665,864)    
Property and equipment, net 1,509,608 948,950    
Other assets:        
Equity investments 493,860 374,209    
Derivative instruments 127      
Other assets 12,827 13,295    
Total other assets 506,814 387,504    
Total assets 2,210,330 1,578,161    
Current liabilities:        
Accounts payable and accrued liabilities 179,118 110,037    
Accounts payable - intercompany 0 0    
Asset retirement obligation—current 780 60    
Short-term derivative instruments 4,808 10,442    
Current maturities of long-term debt 156 150    
Total current liabilities 184,862 120,689    
Long-term derivative instrument 962      
Asset retirement obligation—long-term 13,988 13,215    
Deferred tax liability 93,957 18,607    
Long-term debt, net of current maturities 298,992 298,888    
Other non-current liabilities   354    
Total liabilities 592,761 451,753    
Stockholders’ equity:        
Common stock 775 674    
Paid-in capital 1,399,803 1,036,245    
Accumulated other comprehensive loss (4,841) (3,429)    
Retained earnings (accumulated deficit) 221,832 92,918    
Total stockholders’ equity 1,617,569 1,126,408    
Total liabilities and stockholders’ equity 2,210,330 1,578,161    
Guarantor [Member]
        
Current assets:        
Cash and cash equivalents 1,469 1,795 603 772
Accounts receivable—oil and gas 530 545    
Accounts receivable-related parties 3,376 1,042    
Accounts receivable - intercompany         
Prepaid expenses and other current assets    0    
Deferred tax asset 0      
Short-term derivative instruments    0    
Note receivable - related party 0      
Total current assets 5,375 3,382    
Property and equipment:        
Oil and natural gas properties, full-cost accounting 6,455 4,918    
Other property and equipment 29 20    
Accumulated depletion, depreciation, amortization and impairment (21) (20)    
Property and equipment, net 6,463 4,918    
Other assets:        
Equity investments    0    
Derivative instruments 0      
Other assets    0    
Total other assets          
Total assets 11,838 8,300    
Current liabilities:        
Accounts payable and accrued liabilities 239 207    
Accounts payable - intercompany 18,309 15,259    
Asset retirement obligation—current    0    
Short-term derivative instruments    0    
Current maturities of long-term debt    0    
Total current liabilities 18,548 15,466    
Long-term derivative instrument 0      
Asset retirement obligation—long-term 0 0    
Deferred tax liability    0    
Long-term debt, net of current maturities 0 0    
Other non-current liabilities   0    
Total liabilities 18,548 15,466    
Stockholders’ equity:        
Common stock    0    
Paid-in capital 322 322    
Accumulated other comprehensive loss    0    
Retained earnings (accumulated deficit) (7,032) (7,488)    
Total stockholders’ equity (6,710) (7,166)    
Total liabilities and stockholders’ equity 11,838 8,300    
Non-Guarantor [Member]
        
Current assets:        
Cash and cash equivalents 1 0 0 1
Accounts receivable—oil and gas 0 0    
Accounts receivable-related parties 0 0    
Accounts receivable - intercompany 0      
Prepaid expenses and other current assets 0 0    
Deferred tax asset 0      
Short-term derivative instruments 0 0    
Note receivable - related party 0      
Total current assets 1       
Property and equipment:        
Oil and natural gas properties, full-cost accounting    0    
Other property and equipment    0    
Accumulated depletion, depreciation, amortization and impairment    0    
Property and equipment, net    0    
Other assets:        
Equity investments 189,942 172,766    
Derivative instruments 0      
Other assets    0    
Total other assets 189,942 172,766    
Total assets 189,943 172,766    
Current liabilities:        
Accounts payable and accrued liabilities    0    
Accounts payable - intercompany 110 109    
Asset retirement obligation—current    0    
Short-term derivative instruments    0    
Current maturities of long-term debt    0    
Total current liabilities 110 109    
Long-term derivative instrument 0      
Asset retirement obligation—long-term 0 0    
Deferred tax liability    0    
Long-term debt, net of current maturities 0 0    
Other non-current liabilities   0    
Total liabilities 110 109    
Stockholders’ equity:        
Common stock    0    
Paid-in capital 199,437 174,348    
Accumulated other comprehensive loss (3,344) 2,442    
Retained earnings (accumulated deficit) (6,260) (4,133)    
Total stockholders’ equity 189,833 172,657    
Total liabilities and stockholders’ equity 189,943 172,766    
Eliminations [Member]
        
Current assets:        
Cash and cash equivalents 0 0 0 0
Accounts receivable—oil and gas    0    
Accounts receivable-related parties 0 0    
Accounts receivable - intercompany (18,419) (15,368)    
Prepaid expenses and other current assets    0    
Deferred tax asset 0      
Short-term derivative instruments    0    
Note receivable - related party 0      
Total current assets (18,419) (15,368)    
Property and equipment:        
Oil and natural gas properties, full-cost accounting    0    
Other property and equipment    0    
Accumulated depletion, depreciation, amortization and impairment    0    
Property and equipment, net    0    
Other assets:        
Equity investments (183,123) (165,491)    
Derivative instruments 0      
Other assets    0    
Total other assets (183,123) (165,491)    
Total assets (201,542) (180,859)    
Current liabilities:        
Accounts payable and accrued liabilities    0    
Accounts payable - intercompany (18,419) (15,368)    
Asset retirement obligation—current    0    
Short-term derivative instruments    0    
Current maturities of long-term debt    0    
Total current liabilities (18,419) (15,368)    
Long-term derivative instrument 0      
Asset retirement obligation—long-term 0 0    
Deferred tax liability    0    
Long-term debt, net of current maturities 0 0    
Other non-current liabilities   0    
Total liabilities (18,419) (15,368)    
Stockholders’ equity:        
Common stock    0    
Paid-in capital (199,759) (174,670)    
Accumulated other comprehensive loss 3,344 (2,442)    
Retained earnings (accumulated deficit) 13,292 11,621    
Total stockholders’ equity (183,123) (165,491)    
Total liabilities and stockholders’ equity $ (201,542) $ (180,859)