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Other Income (Tables) | 12 Months Ended
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Dec. 31, 2014
Component of Operating Income [Abstract] |
Schedule of Other Nonoperating Income, by Component [Table Text Block] |
|  | For the Years Ended December 31,
|  | 2014 |  | 2013 |  | 2012
Equity in earnings of affiliates |  | $ | 49,791 |  |  | $ | 33,133 |  |  | $ | 27,048 |
Rental income |  | 45,061 |  |  | 3,518 |  |  | 3,706 |
Coal contract settlement |  | 30,000 |  |  | — |  |  | — |
Gathering revenue |  | 29,558 |  |  | 7,019 |  |  | 5,866 |
Royalty income |  | 19,653 |  |  | 16,906 |  |  | 16,853 |
Right of way issuance |  | 7,333 |  |  | 4,536 |  |  | 3,966 |
Interest income |  | 2,303 |  |  | 15,889 |  |  | 28,937 |
Excess distribution from Equity Affiliate |  | 1,319 |  |  | — |  |  | — |
Service income |  | 1,188 |  |  | 3,085 |  |  | 3,203 |
PA Turnpike settlement |  | — |  |  | 9,000 |  |  | — |
Business interruption insurance |  | — |  |  | 5,445 |  |  | 2,300 |
Other |  | 20,897 |  |  | 12,952 |  |  | 21,291 |
Total Other Income |  | $ | 207,103 |  |  | $ | 111,483 |  |  | $ | 113,170 |

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- Definition Tabular disclosure of the detailed components of other nonoperating income. May include methodology, assumptions and amounts for: (a) dividends, (b) interest on securities, (c) profits on securities (net of losses), and (d) miscellaneous other income items. + 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 210.5-03.7) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Article 5 + Details
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