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Notes Payable (2015 Notes Narrative) (Details) - USD ($) $ in Millions |  | 9 Months Ended
--- | --- | ---
Sep. 15, 2015 | Sep. 30, 2014
September 2015 Notes [Member] |  |
Debt Instrument [Line Items] |  |
Extinguishment of debt, cash paid | $ 48.2 | $ 52.9
Extinguishment of debt, amount | 22.4 | 46.5
Extinguishment of debt, cash paid for shares of common stock |  | $ 33.1
Extinguishment of debt, shares issued |  | 1,496,664
Extinguishment of debt, carrying value at extinguishment |  | $ 43.8
Extinguishment of debt, loss, net of tax |  | $ (5.4)
2015 Notes Embedded Conversion Derivative [Member] |  |
Debt Instrument [Line Items] |  |
Derivative liability, cash paid to settle conversion premium | $ 25.8 |

X
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- Definition Gross amount of debt extinguished. + References No definition available. + Details
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- Definition The difference between the reacquisition price and the net carrying amount of the extinguished debt recognized currently as a component of income in the period of extinguishment, net of tax. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6401765&loc=d3e13305-112630 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6850294&loc=d3e12317-112629 + Details
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