Impairment Charges	6 Months Ended
Impairment Charges	Jun. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Impairment Charges	3. Impairment Charges During the second quarter of 2014, the Company solicited bids related to the potential sale of its coal mining operations. Due to the level of interest observed in the market, the Company concluded that it was more-likely-than-not that the assets would be sold, but the asset group had not met the criteria to be classified as held-for-sale as of the balance sheet date. See events subsequent to the balance sheet date discussed in Note 17. Due to the likely disposition of the assets as well as projected losses resulting from the weakening coal market, the Company evaluated the recoverability of its long-lived asset group. The Company performed a probability-weighted undiscounted cash flows analysis which indicated that the carrying value of the asset group was not recoverable. As such, the Company recorded a pre-tax impairment charge of $97.1 million in its coal mining segment to write down the long-lived assets to their estimated fair value. The fair value was determined based on estimated discounted cash flows from the coal mining assets, which reflected the weakness in the coal market and were considered Level 3 inputs in the fair value hierarchy. Key assumptions included (a) coal sales prices of $97 per ton to $149 per ton; (b) sales volumes of 1.6 million tons to 1.8 million tons; and (c) a 14.0 percent discount rate representing the estimated weighted average cost of capital. Various third party offers for the assets were considered and were also included in the Company's assessment of the fair value of the assets. In previous analyses, based upon the business plan and market expectations of coal prices at that time, the carrying value was recoverable and was substantially in excess of the undiscounted cash flows. Recent changes in market conditions, specifically decreased coal sales price expectations, were included in our current asset impairment analysis. As a result of the likely sale of the business, the weakening coal market and the long-lived asset impairment discussed above, the Company also performed a goodwill impairment analysis as of June 30, 2014 for the coal mining reporting unit. This analysis concluded the fair value of the reporting unit, based on a discounted cash flows analysis, was less than the carrying amount. As a result, the Company recorded a $6.0 million pre-tax impairment of the entire goodwill balance within the coal mining segment. The total pre-tax non-cash impairment charge of $103.1 million was recorded in asset and goodwill impairment in the Consolidated Statement of Operations.

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

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