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Guarantor Subsidiaries, Condensed Statement of Cash Flows (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items] |  |  |
Net Cash Provided by (Used in) Operating Activities, Continuing Operations | $ 459,350 | $ 499,677 | $ 840,386
Cash Provided by (Used in) Operating Activities, Discontinued Operations | 9,935 | 6,172 | 96,390
Net Cash Provided by Operating Activities | 469,285 | 505,849 | 936,776
Investing Activities: |  |  |
Capital Expenditures | (226,820) | (982,934) | (1,459,452)
Proceeds from Divestiture of Interest in Joint Venture | 213,295 | 0 | 0
Proceeds from Sales of Assets | 59,902 | 110,571 | 356,836
Net Investment in Equity Affiliates | 73,743 | (84,221) | 95,207
Net Cash Provided by (Used in) Investing Activities, Continuing Operations | 120,120 | (956,584) | (1,007,409)
Cash Provided by (Used in) Investing Activities, Discontinued Operations | 367,251 | (39,633) | (33,973)
Net Cash Used in Investing Activities | 487,371 | (996,217) | (1,041,382)
Financing Activities: |  |  |
Proceeds from (Repayments of) Debt |  | (4,282) |
Payments On Long Term Notes Including Redemption Premium | 0 | (1,263,719) | (1,819,005)
Proceeds from Issuance of Long-Term Notes | 0 | 492,760 | 1,859,920
Proceeds from Contributions from Parent | 0 |  | 0
Payments for Repurchase of Initial Public Offering |  | 0 |
Proceeds from Collection of Advance to Affiliate |  | 0 |
Excess Tax Benefit (Tax Deficiency) from Share-based Compensation, Financing Activities | 0 | 208 | 2,629
Dividends Paid | (2,294) | (33,281) | (57,506)
(Payments on) Proceeds from Short-Term Borrowings | (952,000) | 952,000 | (11,736)
Repayments of Other Debt | 8,312 | 4,282 | 10,286
Proceeds from Issuance of Common Stock | 4 | 8,288 | 15,016
Other Financing Activities |  |  | 0
Net Cash Provided by (Used in) Financing Activities, Continuing Operations | (968,741) | 386,013 | (45,829)
Cash Provided by (Used in) Financing Activities, Discontinued Operations | (14) | (56) | 0
Net Cash (Used in) Provided by Financing Activities | (968,755) | 385,957 | (45,829)
Net Proceeds from Revolver - MLP | 16,000 | 185,000 | 0
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders | (21,657) | (5,060) | 0
Proceeds from Sale of Interest in Partnership Unit | 0 |  |
Proceeds from Noncontrolling Interests | 0 | 148,359 | 0
Treasury Stock, Value, Acquired, Cost Method | 0 | (71,674) | 0
Payments of Debt Issuance Costs | (482) | (22,586) | (24,861)
Parent Company [Member] |  |  |
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items] |  |  |
Net Cash Provided by (Used in) Operating Activities, Continuing Operations | 943,652 | (153,930) | (178,921)
Cash Provided by (Used in) Operating Activities, Discontinued Operations | 0 | 0 | 0
Net Cash Provided by Operating Activities | 943,652 | (153,930) | (178,921)
Investing Activities: |  |  |
Capital Expenditures | (2,990) | (9,752) | (4,420)
Proceeds from Divestiture of Interest in Joint Venture | 0 |  |
Proceeds from Sales of Assets | 0 | 142 | 44,049
Net Investment in Equity Affiliates | 0 | 0 | 0
Net Cash Provided by (Used in) Investing Activities, Continuing Operations | (2,990) | (9,610) | 39,629
Cash Provided by (Used in) Investing Activities, Discontinued Operations | 0 | 0 | 0
Net Cash Used in Investing Activities | (2,990) | (9,610) | 39,629
Financing Activities: |  |  |
Proceeds from (Repayments of) Debt |  | (1,281) |
Payments On Long Term Notes Including Redemption Premium |  | (1,263,719) | (1,819,005)
Proceeds from Issuance of Long-Term Notes |  | 492,760 | 1,859,920
Proceeds from Contributions from Parent | 0 |  | 0
Payments for Repurchase of Initial Public Offering |  | 0 |
Proceeds from Collection of Advance to Affiliate |  | 0 |
Excess Tax Benefit (Tax Deficiency) from Share-based Compensation, Financing Activities |  | 208 | 2,629
Dividends Paid | (2,294) | (33,281) | (57,506)
(Payments on) Proceeds from Short-Term Borrowings | (952,000) | 952,000 | (11,736)
Repayments of Other Debt | 1,645 |  | 399
Proceeds from Issuance of Common Stock | 4 | 8,288 | 15,016
Other Financing Activities |  |  | 0
Net Cash Provided by (Used in) Financing Activities, Continuing Operations | (955,935) | 83,301 |
Cash Provided by (Used in) Financing Activities, Discontinued Operations | 0 | 0 |
Net Cash (Used in) Provided by Financing Activities | (955,935) | 83,301 | (35,942)
Net Proceeds from Revolver - MLP | 0 | 0 |
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders | 0 | 0 |
Proceeds from Sale of Interest in Partnership Unit | 0 |  |
Proceeds from Noncontrolling Interests |  | 0 |
Treasury Stock, Value, Acquired, Cost Method |  | (71,674) |
Payments of Debt Issuance Costs | 0 |  | (24,861)
Payments of Financing Costs |  | 0 |
Cnx Gas Guarantor [Member] |  |  |
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items] |  |  |
Net Cash Provided by (Used in) Operating Activities, Continuing Operations | (165,861) | 624,788 | 567,851
Cash Provided by (Used in) Operating Activities, Discontinued Operations | 0 | 0 | 0
Net Cash Provided by Operating Activities | (165,861) | 624,788 | 567,851
Investing Activities: |  |  |
Capital Expenditures | (165,101) | (832,446) | (1,103,656)
Proceeds from Divestiture of Interest in Joint Venture | 213,295 |  |
Proceeds from Sales of Assets | 44,710 | 10,298 | 92,507
Net Investment in Equity Affiliates | 79,103 | (79,756) | 85,248
Net Cash Provided by (Used in) Investing Activities, Continuing Operations | 172,007 | (901,904) | (925,901)
Cash Provided by (Used in) Investing Activities, Discontinued Operations | 0 | 0 | 0
Net Cash Used in Investing Activities | 172,007 | (901,904) | (925,901)
Financing Activities: |  |  |
Proceeds from (Repayments of) Debt |  | (6,391) |
Payments On Long Term Notes Including Redemption Premium |  | 0 | 0
Proceeds from Issuance of Long-Term Notes |  | 0 | 0
Proceeds from Contributions from Parent | 0 |  | 0
Payments for Repurchase of Initial Public Offering |  | 0 |
Proceeds from Collection of Advance to Affiliate |  | 0 |
Excess Tax Benefit (Tax Deficiency) from Share-based Compensation, Financing Activities |  | 0 | 0
Dividends Paid | 0 | 0 | 0
(Payments on) Proceeds from Short-Term Borrowings | 0 | 252,900 | 0
Repayments of Other Debt | 6,138 |  | (387,663)
Proceeds from Issuance of Common Stock | 0 | 0 | 0
Other Financing Activities |  |  | (5,169)
Net Cash Provided by (Used in) Financing Activities, Continuing Operations | (6,138) | 246,509 |
Cash Provided by (Used in) Financing Activities, Discontinued Operations | 0 | 0 |
Net Cash (Used in) Provided by Financing Activities | (6,138) | 246,509 | 382,494
Net Proceeds from Revolver - MLP | 0 | 0 |
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders | 0 | 0 |
Proceeds from Sale of Interest in Partnership Unit | 0 |  |
Proceeds from Noncontrolling Interests |  | 0 |
Treasury Stock, Value, Acquired, Cost Method |  | 0 |
Payments of Debt Issuance Costs | 0 |  | 0
Payments of Financing Costs |  | 0 |
Other Guarantors Subsidiaries [Member] |  |  |
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items] |  |  |
Net Cash Provided by (Used in) Operating Activities, Continuing Operations | 58,648 | 21,906 | (4,086)
Cash Provided by (Used in) Operating Activities, Discontinued Operations | 0 | 0 | 0
Net Cash Provided by Operating Activities | 58,648 | 21,906 | (4,086)
Investing Activities: |  |  |
Capital Expenditures | (46,025) | (106,663) | (266,300)
Proceeds from Divestiture of Interest in Joint Venture | 0 |  |
Proceeds from Sales of Assets | 15,169 | 100,060 | 201,221
Net Investment in Equity Affiliates | (5,360) | (4,465) | 9,959
Net Cash Provided by (Used in) Investing Activities, Continuing Operations | (14,716) | (11,068) | (55,120)
Cash Provided by (Used in) Investing Activities, Discontinued Operations | 0 | 0 | 0
Net Cash Used in Investing Activities | (14,716) | (11,068) | (55,120)
Financing Activities: |  |  |
Proceeds from (Repayments of) Debt |  | 3,443 |
Payments On Long Term Notes Including Redemption Premium |  | 0 | 0
Proceeds from Issuance of Long-Term Notes |  | 0 | 0
Proceeds from Contributions from Parent | 0 |  | 0
Payments for Repurchase of Initial Public Offering |  | 0 |
Proceeds from Collection of Advance to Affiliate |  | 0 |
Excess Tax Benefit (Tax Deficiency) from Share-based Compensation, Financing Activities |  | 0 | 0
Dividends Paid | 0 | 0 | 0
(Payments on) Proceeds from Short-Term Borrowings | 0 | 0 | 0
Repayments of Other Debt | 450 |  | 7,233
Proceeds from Issuance of Common Stock | 0 | 0 | 0
Other Financing Activities |  |  | 5,169
Net Cash Provided by (Used in) Financing Activities, Continuing Operations | (932) | (10,838) |
Cash Provided by (Used in) Financing Activities, Discontinued Operations | 0 | 0 |
Net Cash (Used in) Provided by Financing Activities | (932) | (10,838) | (2,064)
Net Proceeds from Revolver - MLP | 0 | 0 |
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders | 0 | 0 |
Proceeds from Sale of Interest in Partnership Unit | 21,500 |  |
Proceeds from Noncontrolling Interests |  | 0 |
Treasury Stock, Value, Acquired, Cost Method |  | 0 |
Payments of Debt Issuance Costs | (482) |  | 0
Payments of Financing Costs |  | (14,281) |
Non-Guarantor Subsidiaries [Member] |  |  |
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items] |  |  |
Net Cash Provided by (Used in) Operating Activities, Continuing Operations | (377,257) | 33,422 | (59,441)
Cash Provided by (Used in) Operating Activities, Discontinued Operations | 9,935 | 6,172 | 96,390
Net Cash Provided by Operating Activities | (367,322) | 39,594 | 36,949
Investing Activities: |  |  |
Capital Expenditures | 0 | 0 | 0
Proceeds from Divestiture of Interest in Joint Venture | 0 |  |
Proceeds from Sales of Assets | 0 | 0 | 13
Net Investment in Equity Affiliates | 0 | 0 | 0
Net Cash Provided by (Used in) Investing Activities, Continuing Operations | 0 | 0 | 13
Cash Provided by (Used in) Investing Activities, Discontinued Operations | 367,251 | (39,633) | (33,973)
Net Cash Used in Investing Activities | 367,251 | (39,633) | (33,960)
Financing Activities: |  |  |
Proceeds from (Repayments of) Debt |  | 0 |
Payments On Long Term Notes Including Redemption Premium |  | 0 | 0
Proceeds from Issuance of Long-Term Notes |  | 0 | 0
Proceeds from Contributions from Parent | 0 |  | 0
Payments for Repurchase of Initial Public Offering |  | 0 |
Proceeds from Collection of Advance to Affiliate |  | 0 |
Excess Tax Benefit (Tax Deficiency) from Share-based Compensation, Financing Activities |  | 0 | 0
Dividends Paid | 0 | 0 | 0
(Payments on) Proceeds from Short-Term Borrowings | 0 | 0 | 0
Repayments of Other Debt | 0 |  | 2,630
Proceeds from Issuance of Common Stock | 0 | 0 | 0
Other Financing Activities |  |  | 0
Net Cash Provided by (Used in) Financing Activities, Continuing Operations | 0 | 0 |
Cash Provided by (Used in) Financing Activities, Discontinued Operations | (14) | (56) |
Net Cash (Used in) Provided by Financing Activities | (14) | (56) | (2,630)
Net Proceeds from Revolver - MLP | 0 | 0 |
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders | 0 | 0 |
Proceeds from Sale of Interest in Partnership Unit | 0 |  |
Proceeds from Noncontrolling Interests |  | 0 |
Treasury Stock, Value, Acquired, Cost Method |  | 0 |
Payments of Debt Issuance Costs | 0 |  | 0
Payments of Financing Costs |  | 0 |
CNX Coal Resources LP [Member] |  |  |
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items] |  |  |
Net Cash Provided by (Used in) Operating Activities, Continuing Operations | 73,098 | 76,908 | 142,636
Cash Provided by (Used in) Operating Activities, Discontinued Operations | 0 | 0 | 0
Net Cash Provided by Operating Activities | 73,098 | 76,908 | 142,636
Investing Activities: |  |  |
Capital Expenditures | (12,704) | (34,073) | (85,076)
Proceeds from Divestiture of Interest in Joint Venture | 0 |  |
Proceeds from Sales of Assets | 23 | 71 | 19,046
Net Investment in Equity Affiliates | 0 | 0 | 0
Net Cash Provided by (Used in) Investing Activities, Continuing Operations | (34,181) | (34,002) | (66,030)
Cash Provided by (Used in) Investing Activities, Discontinued Operations | 0 | 0 | 0
Net Cash Used in Investing Activities | (34,181) | (34,002) | (66,030)
Financing Activities: |  |  |
Proceeds from (Repayments of) Debt |  | (53) |
Payments On Long Term Notes Including Redemption Premium |  | (10,951) | (2,311)
Proceeds from Issuance of Long-Term Notes |  | 16,990 | 14,214
Proceeds from Contributions from Parent | (8,953) |  | (88,485)
Payments for Repurchase of Initial Public Offering |  | (342,711) |
Proceeds from Collection of Advance to Affiliate |  | (17,328) |
Excess Tax Benefit (Tax Deficiency) from Share-based Compensation, Financing Activities |  | 0 | 0
Dividends Paid | 0 | 0 | 0
(Payments on) Proceeds from Short-Term Borrowings | 0 | 0 | 0
Repayments of Other Debt | 79 |  | 24
Proceeds from Issuance of Common Stock | 0 | 0 | 0
Other Financing Activities |  |  | 0
Net Cash Provided by (Used in) Financing Activities, Continuing Operations | (35,666) | (36,376) |
Cash Provided by (Used in) Financing Activities, Discontinued Operations | 0 | 0 |
Net Cash (Used in) Provided by Financing Activities | (35,666) | (36,376) | (76,606)
Net Proceeds from Revolver - MLP | 16,000 | 185,000 |
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders | (42,634) | (11,353) |
Proceeds from Sale of Interest in Partnership Unit | (21,500) |  |
Proceeds from Noncontrolling Interests |  | 148,359 |
Treasury Stock, Value, Acquired, Cost Method |  | 0 |
Payments of Debt Issuance Costs | 0 |  | 0
Payments of Financing Costs |  | (4,329) |
Consolidation, Eliminations [Member] |  |  |
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items] |  |  |
Net Cash Provided by (Used in) Operating Activities, Continuing Operations | (72,930) | (103,417) | 372,347
Cash Provided by (Used in) Operating Activities, Discontinued Operations | 0 | 0 | 0
Net Cash Provided by Operating Activities | (72,930) | (103,417) | 372,347
Investing Activities: |  |  |
Capital Expenditures | 0 | 0 | 0
Proceeds from Divestiture of Interest in Joint Venture | 0 |  |
Proceeds from Sales of Assets | 0 | 0 | 0
Net Investment in Equity Affiliates | 0 | 0 | 0
Net Cash Provided by (Used in) Investing Activities, Continuing Operations | 0 | 0 | 0
Cash Provided by (Used in) Investing Activities, Discontinued Operations | 0 | 0 | 0
Net Cash Used in Investing Activities | 0 | 0 | 0
Financing Activities: |  |  |
Proceeds from (Repayments of) Debt |  | 0 |
Payments On Long Term Notes Including Redemption Premium |  | 10,951 | 2,311
Proceeds from Issuance of Long-Term Notes |  | (16,990) | (14,214)
Proceeds from Contributions from Parent | 8,953 |  | 88,485
Payments for Repurchase of Initial Public Offering |  | 342,711 |
Proceeds from Collection of Advance to Affiliate |  | 17,328 |
Excess Tax Benefit (Tax Deficiency) from Share-based Compensation, Financing Activities |  | 0 | 0
Dividends Paid | 0 | 0 | 0
(Payments on) Proceeds from Short-Term Borrowings | 0 | (252,900) | 0
Repayments of Other Debt | 0 |  | 387,663
Proceeds from Issuance of Common Stock | 0 | 0 | 0
Other Financing Activities |  |  | 0
Net Cash Provided by (Used in) Financing Activities, Continuing Operations | 29,930 | 103,417 |
Cash Provided by (Used in) Financing Activities, Discontinued Operations | 0 | 0 |
Net Cash (Used in) Provided by Financing Activities | 29,930 | 103,417 | (311,081)
Net Proceeds from Revolver - MLP | 0 | 0 |
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders | 20,977 | 6,293 |
Proceeds from Sale of Interest in Partnership Unit | 0 |  |
Proceeds from Noncontrolling Interests |  | 0 |
Treasury Stock, Value, Acquired, Cost Method |  | 0 |
Payments of Debt Issuance Costs | $ 0 |  | $ 0
Payments of Financing Costs |  | $ (3,976) |

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