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Equity - Equity Method Investments (Details) | Aug. 07, 2013 $ / shares shares | Jun. 30, 2015 $ / shares | Dec. 31, 2014 $ / shares
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Schedule of Equity Method Investments [Line Items] |  |  |
Common stock, par value per share | $ 0.50 | $ 0.50 | $ 0.50
Ratio of common stock to warrant | 0.14771 |  |
Warrant |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Exercise price | $ 40.00 |  |
Number of securities called by warrants | shares | 1 |  |
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right | shares | 3,000,000 |  |

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- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(4)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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