Fair Value of Financial Instruments (Details) - USD ($) $ in Millions |
Sep. 30, 2015 |
Aug. 18, 2014 |
Dec. 21, 2012 |
Oct. 17, 2012 |
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| Debt Instrument [Line Items] | ||||
| Fair value of notes | $ 914.7 | |||
| October Notes [Member] | ||||
| Debt Instrument [Line Items] | ||||
| Unamortized discount | 2.6 | |||
| December Notes [Member] | ||||
| Debt Instrument [Line Items] | ||||
| Unamortized premium | 0.3 | |||
| August Notes [Member] | ||||
| Debt Instrument [Line Items] | ||||
| Unamortized premium | 15.3 | |||
| Senior Notes [Member] | ||||
| Debt Instrument [Line Items] | ||||
| Carrying value of debt | $ 963.0 | |||
| Unamortized discount | $ 3.7 | |||
| Unamortized premium | $ 18.0 | $ 0.5 |
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- Definition Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The amount of debt premium that was originally recognized at the issuance of the instrument that has yet to be amortized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Represents the aggregate of total long-term debt, including current maturities and short-term debt. No definition available.
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