v2.4.0.8
Guarantor Subsidiaries, Condensed Statement of Cash Flows (Details) (USD $)
 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items]    
Net Cash Provided by Operating Activities $ 393,394,000 $ 367,949,000
Investing Activities:    
Capital Expenditures (758,000,000) (714,399,000)
Net Cash Used in Investing Activities (465,126,000) (484,009,000)
Financing Activities:    
Dividends Paid (28,601,000) (56,833,000)
Proceeds from Issuance of Common Stock 2,497,000 457,000
(Payments on) Proceeds from Short-Term Borrowings 173,000,000  
Other Financing Activities 2,185,000 (2,636,000)
Payments on Securitization Facility 2,873,000  
Repayments of Other Debt (30,162,000) (4,662,000)
Net Cash (Used in) Provided by Financing Activities 121,792,000 (59,469,000)
Equity Method Investment, Dividends or Distributions (16,600,000) (35,900,000)
Income (Loss) from Equity Method Investments, Net of Dividends or Distributions   14,061,000
Proceeds from Sale of Property, Plant, and Equipment   252,229,000
Increase (Decrease) in Restricted Cash 68,673,000 0
Payments for (Proceeds from) Other Investing Activities (240,801,000)  
Parent Issuer [Member]
    
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items]    
Net Cash Provided by Operating Activities 35,486,000 271,127,000
Investing Activities:    
Capital Expenditures (7,511,000) (24,722,000)
Net Cash Used in Investing Activities (7,511,000) 144,778,000
Financing Activities:    
Dividends Paid 21,399,000 143,167,000
Proceeds from Issuance of Common Stock 2,497,000  
(Payments on) Proceeds from Short-Term Borrowings 0  
Other Financing Activities 2,185,000 1,580,000
Payments on Securitization Facility 0  
Repayments of Other Debt (26,280,000)  
Net Cash (Used in) Provided by Financing Activities (199,000) 144,747,000
Equity Method Investment, Dividends or Distributions 0 0
Income (Loss) from Equity Method Investments, Net of Dividends or Distributions   0
Proceeds from Sale of Property, Plant, and Equipment   169,500,000
Increase (Decrease) in Restricted Cash 0  
Payments for (Proceeds from) Other Investing Activities 0  
CNX Gas Guarantor [Member]
    
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items]    
Net Cash Provided by Operating Activities 263,284,000 124,367,000
Investing Activities:    
Capital Expenditures (395,593,000) (241,661,000)
Net Cash Used in Investing Activities (412,450,000) (243,062,000)
Financing Activities:    
Dividends Paid (50,000,000) (200,000,000)
Proceeds from Issuance of Common Stock 0  
(Payments on) Proceeds from Short-Term Borrowings 224,800,000  
Other Financing Activities 0 (3,751,000)
Payments on Securitization Facility 0  
Repayments of Other Debt 0  
Net Cash (Used in) Provided by Financing Activities 174,800,000 (203,751,000)
Equity Method Investment, Dividends or Distributions (22,501,000) (35,150,000)
Income (Loss) from Equity Method Investments, Net of Dividends or Distributions   3,500,000
Proceeds from Sale of Property, Plant, and Equipment   30,249,000
Increase (Decrease) in Restricted Cash 0  
Payments for (Proceeds from) Other Investing Activities (5,644,000)  
Other Guarantors Subsidiaries [Member]
    
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items]    
Net Cash Provided by Operating Activities 46,545,000 (28,281,000)
Investing Activities:    
Capital Expenditures (354,896,000) (448,016,000)
Net Cash Used in Investing Activities (45,178,000) (385,736,000)
Financing Activities:    
Dividends Paid 0 0
Proceeds from Issuance of Common Stock 0  
(Payments on) Proceeds from Short-Term Borrowings 0  
Other Financing Activities 0 2,000
Payments on Securitization Facility 0  
Repayments of Other Debt (3,555,000)  
Net Cash (Used in) Provided by Financing Activities (3,555,000) 2,000
Equity Method Investment, Dividends or Distributions 5,901,000 (750,000)
Income (Loss) from Equity Method Investments, Net of Dividends or Distributions   10,561,000
Proceeds from Sale of Property, Plant, and Equipment   52,469,000
Increase (Decrease) in Restricted Cash 68,673,000  
Payments for (Proceeds from) Other Investing Activities (235,144,000)  
Non-Guarantors [Member]
    
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items]    
Net Cash Provided by Operating Activities (3,721,000) 736,000
Investing Activities:    
Capital Expenditures 0 0
Net Cash Used in Investing Activities 13,000 11,000
Financing Activities:    
Dividends Paid 0 0
Proceeds from Issuance of Common Stock 0  
(Payments on) Proceeds from Short-Term Borrowings 0  
Other Financing Activities 0 (467,000)
Payments on Securitization Facility 2,873,000  
Repayments of Other Debt (327,000)  
Net Cash (Used in) Provided by Financing Activities 2,546,000 (467,000)
Equity Method Investment, Dividends or Distributions 0 0
Income (Loss) from Equity Method Investments, Net of Dividends or Distributions   0
Proceeds from Sale of Property, Plant, and Equipment   11,000
Increase (Decrease) in Restricted Cash 0  
Payments for (Proceeds from) Other Investing Activities (13,000)  
Consolidation, Eliminations [Member]
    
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items]    
Net Cash Provided by Operating Activities 51,800,000 0
Investing Activities:    
Capital Expenditures 0 0
Net Cash Used in Investing Activities 0 0
Financing Activities:    
Dividends Paid 0 0
Proceeds from Issuance of Common Stock 0  
(Payments on) Proceeds from Short-Term Borrowings (51,800,000)  
Other Financing Activities 0 0
Payments on Securitization Facility 0  
Repayments of Other Debt 0  
Net Cash (Used in) Provided by Financing Activities (51,800,000) 0
Equity Method Investment, Dividends or Distributions 0 0
Income (Loss) from Equity Method Investments, Net of Dividends or Distributions   0
Proceeds from Sale of Property, Plant, and Equipment   0
Increase (Decrease) in Restricted Cash 0  
Payments for (Proceeds from) Other Investing Activities $ 0