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(1) Summary of Significant Accounting Policies (Details) | 12 Months Ended | 36 Months Ended
--- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2016 T
Accounting Policies [Abstract] |  |  |
EquityInterestinSELLP | 45.00% |  |
Equity Interest in SELLC | 50.00% |  |
Fair Value Inputs, Discount Rate | 5.50% |  |
Tons of Coal Commitment for Three Years (in US Ton) |  |  | 5,800,000
Sales Accounted For By Three Customers | 94.00% | 93.00% |
Percent Sales To One Customer | 39.00% | 46.00% |
Percent Sales To Second Customer | 29.00% | 31.00% |
Percent Sales To Third Customer | 14.00% | 16.00% |
Percent Sales to Fourth Customer | 12.00% |  |

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- Definition Equity Interest in SELLC + References No definition available. + Details
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- Definition Our 45% interest in Savoy Energy LP + References No definition available. + Details
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- Definition Tons of Coal Commitment for Three Years + References No definition available. + Details
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- Definition Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
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