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Other Income | 12 Months Ended
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Dec. 31, 2016
Component of Operating Income [Abstract] |
Other Income and Other Expense Disclosure [Text Block] | NOTE 4—MISCELLANEOUS OTHER INCOME:
|  | For the Years Ended December 31,
|  | 2016 |  | 2015 |  | 2014
Equity in Earnings of Affiliates - CONE |  | $ | 48,260 |  |  | $ | 43,799 |  |  | $ | 29,807 |
Rental Income |  | 36,059 |  |  | 37,984 |  |  | 45,059 |
Right of Way Issuance |  | 27,343 |  |  | 13,289 |  |  | 7,333 |
Royalty Income - Non-Operated Coal |  | 20,083 |  |  | 15,402 |  |  | 19,653 |
Gathering Revenue |  | 10,834 |  |  | 9,530 |  |  | 23,520 |
Coal Contract Buyout |  | 6,288 |  |  | — |  |  | 30,000 |
Purchased Coal Sales |  | 5,757 |  |  | 1,596 |  |  | 9,029 |
Equity in Earnings of Affiliates - Other |  | 4,818 |  |  | 11,098 |  |  | 19,984 |
Interest Income |  | 1,507 |  |  | 2,299 |  |  | 2,303 |
Other |  | 6,357 |  |  | 9,354 |  |  | 20,772 |
Miscellaneous Other Income |  | $ | 167,306 |  |  | $ | 144,351 |  |  | $ | 207,460 |

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- Definition The entire disclosure for other income or other expense items (both operating and nonoperating). Sources of nonoperating income or nonoperating expense that may be disclosed, include amounts earned from dividends, interest on securities, profits (losses) on securities, net and miscellaneous other income or income deductions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3,6,7,9) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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