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Supplemental Guarantor Financial Information (Details) | Dec. 31, 2012 | Dec. 31, 2012 4.75% Notes | Dec. 31, 2003 4.75% Notes | Dec. 31, 2012 7.25% Notes | Nov. 30, 2010 7.25% Notes | Dec. 31, 2012 Guarantor Subsidiaries
--- | --- | --- | --- | --- | --- | ---
Long-term Debt |  |  |  |  |  |
Ownership interest (as a percent) | 100.00% |  |  |  |  | 100.00%
Interest rate (as a percent) |  | 4.75% | 4.75% | 7.25% | 7.25% |

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- Definition The parent entity's interest in net assets of the subsidiary, expressed as a percentage. + References No definition available. + Details
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