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Related Party (Details) - USD ($) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2016 | Sep. 30, 2014 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Related Party Transaction [Line Items] |  |  |  |  |
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures |  |  | $ 190,964,000 | $ 237,330,000 |
Additional Paid in Capital |  |  | 2,460,864,000 | 2,435,497,000 |
Initial Public Offering overallotment | 561,067 |  |  |  |
Income (Loss) from Equity Method Investments |  |  | (53,078,000) | (54,897,000) | $ (49,791,000)
Partners' Capital Account, Units, Sold in Public Offering | 5,000,000 |  |  |  |
Initial Public Offering Share Price | $ 15.00 |  |  |  |
Debt Instrument, Face Amount | $ 400,000,000 |  |  |  |
Long-term Debt |  |  | 2,724,672,000 | 2,705,718,000 |
Financing Related Fees | 3,000,000 |  |  |  |
Long-term debt, net of fees | 197,000,000 |  |  |  |
Net Proceeds from Initial Public Offering | 342,711,000 |  |  |  |
Proceeds from Noncontrolling Interests |  |  | $ 21,500 |  |
Shares Issued by Noncontrolling Interest - Drop |  |  | 3,956,496 |  |
Share Price - Drop |  |  | $ 17.01 |  |
Total Equity Consideration - Drop |  |  | $ 67,300 |  |
Accounts Payable, Related Parties |  |  | 1,666,000 | 4,000 |
CONE Gathering [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures |  |  | 151,075,000 | 202,570,000 | 94,467,000
Limited Partners' Contributed Capital |  |  | 17,112,000 | 20,916,000 |
Additional Paid in Capital |  |  | 4,621,000 | 87,187,000 |
Related Party Transaction, Expenses from Transactions with Related Party |  |  | 706,000 | 1,077 | 219
Income (Loss) from Equity Method Investments |  |  | 17,112,000 | 20,916,000 | 25,521,000
Distribution Made to Limited Partner, Cash Distributions Paid |  |  | (8,224,000) | 0 |
Equity Method Investment, Net Sales Proceeds |  |  | (70,000,000) |  |
Equity Method Investment, Change in Basis |  |  | 4,996,000 |  |
CONE Midstream [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures |  |  | 18,133,000 | 11,047,000 | 4,883,000
Limited Partners' Contributed Capital |  |  | 31,148,000 | 22,883,000 |
Additional Paid in Capital |  |  | 0 | 0 |
Sale of Stock, Description of Transaction |  | 20125000 |  |  |
Excess Stock, Shares Authorized |  | 2,625,000 |  |  |
Total Purchase Consideration of Drop |  |  | 248,000,000 |  |
Equity Method Investment, Cash Consideration for Drop |  |  | $ 140,000,000 |  |
Equity Method Investment, Stock Issued on Drop |  |  | 5,200,000 |  |
Related Party Transaction, Expenses from Transactions with Related Party |  |  | $ 123,020 | 104,291 | 65,365
Income (Loss) from Equity Method Investments |  |  | 31,148,000 | 22,883,000 | 4,286,000
Distribution Made to Limited Partner, Cash Distributions Paid |  |  | (19,066,000) | (16,719,000) |
Equity Method Investment, Net Sales Proceeds |  |  | 0 |  |
Equity Method Investment, Change in Basis |  |  | (4,996,000) |  |
CONE [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures |  |  | 169,208,000 | 213,617,000 | 99,350,000
Limited Partners' Contributed Capital |  |  | 48,260,000 | 43,799,000 |
Additional Paid in Capital |  |  | 4,621,000 | 87,187,000 |
Due from Related Parties |  |  | 5,815,000 | 12,216,000 |
Inventory, Raw Materials and Purchased Parts, Net of Reserves |  |  | 2,239,000 |  |
Distribution Made to Limited Partner, Cash Distributions Paid |  |  | (27,290,000) | (16,719,000) |
Equity Method Investment, Net Sales Proceeds |  |  | (70,000,000) |  |
Equity Method Investment, Change in Basis |  |  | 0 |  |
CNX Coal Resources LP [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Proceeds from Issuance Initial Public Offering | 75,000,000 |  |  |  |
Long-term Debt | $ 200,000,000 |  |  |  |
Selling and Direct Administrative Expenses [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Related Party Transaction, Expenses from Transactions with Related Party |  |  | 3,826,000 | 8,926,000 | 11,384,000
Operating and Other Costs [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Related Party Transaction, Expenses from Transactions with Related Party |  |  | $ 4,251,000 | $ 6,793,000 | $ 6,707,000

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- Definition Income from servicing real estate mortgages, credit cards, and other financial assets held by others. Also include any premiums received in lieu of regular servicing fees on such loans only as earned over the life of the loans. May also be net of any related impairment of fair value of capitalized service costs, includes capital market fees, loan commitment, fees and credit-related trade fees. + References No definition available. + Details
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- Definition Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.30(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 31 -Article 5 + Details
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- Definition This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35755396&loc=d3e33749-111570 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.12) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 9 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 7 + Details
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- Definition Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 + Details
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- Definition Description of stock transaction which may include details of the offering (IPO, private placement), a description of the stock sold, percentage of subsidiary's or equity investee's stock sold, a description of the investors and whether the stock was issued in a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4582445-111684 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=51664549&loc=SL4569655-111683 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684 + Details
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