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Supplemental Guarantor Information Supplemental Guarantor Information (Level 4 Textuals) (Details)
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Jan. 31, 2014
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Subsidiary of Common Parent [Member]
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| Entity Information [Line Items] | |
| Subsidiary of Company, Ownership Percentage by Parent | 100.00% |
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Guarantor Subsidiaries [Member]
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| Entity Information [Line Items] | |
| Subsidiary of Company, Ownership Percentage by Parent | 100.00% |