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Property, Plant and Equipment | 12 Months Ended
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Dec. 31, 2016
Property, Plant and Equipment [Abstract] |
Property, Plant and Equipment | PROPERTY, PLANT AND EQUIPMENT:
| December 31,
E&P Property, Plant and Equipment | 2016 |  | 2015
Intangible drilling cost | $ | 3,583,565 |  |  | $ | 3,452,989 |
Proved gas properties | 2,016,916 |  |  | 1,922,602 |
Unproved gas properties | 1,116,282 |  |  | 1,421,083 |
Gas gathering equipment | 1,138,299 |  |  | 1,147,173 |
Gas wells and related equipment | 791,996 |  |  | 785,744 |
Other gas assets | 190,406 |  |  | 125,691 |
Gas advance royalties | 13,762 |  |  | 19,745 |
Total E&P Property, Plant and Equipment | $ | 8,851,226 |  |  | $ | 8,875,027 |
Less: Accumulated Depreciation, Depletion and Amortization | 3,106,296 |  |  | 2,695,674 |
Total E&P Property, Plant and Equipment - Net | $ | 5,744,930 |  |  | $ | 6,179,353 |
PA Mining Operations Property, Plant and Equipment |  |  |
Coal and other plant and equipment | $ | 2,307,668 |  |  | $ | 2,284,103 |
Coal properties and surface lands | 458,398 |  |  | 456,044 |
Airshafts | 371,752 |  |  | 351,870 |
Mine development | 326,152 |  |  | 326,225 |
Coal advance mining royalties | 16,224 |  |  | 16,263 |
Leased coal lands | 26,566 |  |  | 26,402 |
Total PA Mining Operations Property, Plant and Equipment | $ | 3,506,760 |  |  | $ | 3,460,907 |
Less: Accumulated Depreciation, Depletion and Amortization | 1,768,712 |  |  | 1,603,642 |
Total PA Mining Operations Property, Plant and Equipment - Net | $ | 1,738,048 |  |  | $ | 1,857,265 |
Other Property, Plant and Equipment |  |  |
Coal and other plant and equipment | $ | 532,919 |  |  | $ | 569,333 |
Coal properties and surface lands | 481,126 |  |  | 484,348 |
Airshafts | 10,003 |  |  | 10,002 |
Mine development | 17,988 |  |  | 18,073 |
Coal advance mining royalties | 310,530 |  |  | 312,452 |
Leased coal lands | 60,836 |  |  | 64,765 |
Total Other Property, Plant and Equipment | $ | 1,413,402 |  |  | $ | 1,458,973 |
Less: Accumulated Depreciation, Depletion and Amortization | 755,941 |  |  | 762,885 |
Total Other Property, Plant and Equipment - Net | $ | 657,461 |  |  | $ | 696,088 |
Total Company Property, Plant and Equipment | $ | 13,771,388 |  |  | $ | 13,794,907 |
Less - Total Company Accumulated Depreciation, Depletion and Amortization | 5,630,949 |  |  | 5,062,201 |
Total Company Property, Plant and Equipment - Net | $ | 8,140,439 |  |  | $ | 8,732,706 |
The following assets are amortized using the units-of-production method. Amounts reflect properties where mining or drilling operations have not yet commenced and therefore, are not being amortized for the years ended December 31, 2016 and 2015, respectively.
| December 31,
| 2016 |  | 2015
Unproved gas properties | $ | 1,116,282 |  |  | $ | 1,421,083 |
Coal properties | 195,354 |  |  | 258,099 |
Leased coal lands | 36,788 |  |  | 44,805 |
Airshafts | 19,693 |  |  | 24,674 |
Coal advance mining royalties | 16,270 |  |  | 21,544 |
Gas advance royalties | 13,762 |  |  | 19,745 |
Mine development | 7,771 |  |  | 7,930 |
Total | $ | 1,405,920 |  |  | $ | 1,797,880 |
As of December 31, 2016 and 2015, plant and equipment includes gross assets under capital lease of $77,438 and $79,551, respectively. Included in Gas gathering equipment under the E&P division is a capital lease for the Jewell Ridge Pipeline of $66,919 at December 31, 2016 and 2015. The E&P division also maintains a capital lease for vehicles of $6,015 and $7,474 at December 31, 2016 and 2015, respectively, which is included in Other gas assets. At December 31, 2016 and 2015, the PA Mining segment maintains capital leases for vehicles of $2,525 and $1,923, respectively, which are included in Coal and other plant and equipment. At December 31, 2016 and 2015, the Other segment maintains capital leases for vehicles and computer equipment of $1,979 and $3,235, respectively, which are included in Coal and other plant and equipment. Accumulated amortization for capital leases was $51,213 and $46,503 at December 31, 2016 and 2015, respectively. Amortization expense for capital leases is included in Depreciation, Depletion and Amortization in the Consolidated Statements of Income. See Note 13–Leases for further discussion of capital leases. Industry Participation Agreements CONSOL Energy had two significant industry participation agreements (referred to as "joint ventures" or "JVs") that provided drilling and completion carries for the Company's retained interests. CNX Gas Company is party to a joint development agreement with Hess Ohio Developments, LLC (Hess) with respect to approximately 155 thousand net Utica Shale acres in Ohio in which each party has a 50% undivided interest. Under the agreement, as amended, Hess was obligated to pay a total of approximately $335,000 in the form of a 50% drilling carry of certain CONSOL Energy working interest obligations as the acreage is developed. As of December 31, 2016, Hess' entire carry obligation has been met. CNX Gas Company was party to a joint development agreement with Noble Energy, Inc. (Noble) with respect to approximately 700 thousand net Marcellus Shale oil and gas acres in West Virginia and Pennsylvania, in which each party owned a 50% undivided interest. On October 29, 2016, CNX Gas entered into an Exchange Agreement with Noble Energy, which terminated the joint development agreement related to the jointly owned gas assets held in connection with the joint venture with Noble and divided such jointly owned gas assets among CNX Gas and Noble Energy. The transactions contemplated by the Exchange Agreement was closed on December 1, 2016 with an effective date of October 1, 2016. As part of the exchange: each party will own and operate a 100% interest in its properties and wells in two separate operating areas; each party will have independent control and flexibility with respect to the scope and timing of future development over its operating area; and all acreage operated by CONSOL Energy and Noble Energy, Inc. in their respective operating areas will remain fully dedicated to CONE Midstream Partners LP. Cash proceeds of approximately $213,295 were received at closing and are included in cash flows from investing activities in the Consolidated Statements of Cash Flows. The exchange was accounted for as a mineral conveyance, thus no gain or loss was recorded in connection with the transaction.

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- Definition The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures. + 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 210.5-02.13-14) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=51717284&loc=d3e1361-107760 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=51719941&loc=d3e2921-110230 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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