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Supplemental Guarantor Financial Information - Narrative (Details) - USD ($) | Sep. 30, 2015 | Dec. 31, 2014
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Guarantor Subsidiaries |  |
Debt Instrument [Line Items] |  |
Ownership interest (as a percent) | 100.00% |
7.25% senior notes due December 2018 |  |
Debt Instrument [Line Items] |  |
Interest rate (as a percent) | 7.25% | 7.25%
Aggregate principal amount | $ 350,000,000 |

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