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Fair Value Disclosures (Narratives) (Details) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Feb. 28, 2015 | Feb. 28, 2014 | Nov. 30, 2014
Fair Value Disclosures [Abstract] |  |  |
Long-lived assets held and used, carrying value |  |  | $ 68,200,000 kbh_InventoryImpactedbyPretaxNoncashInventoryImpairmentChargesCarryingValue
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Impairment of Real Estate | 0 us-gaap_ImpairmentOfRealEstate | 0 us-gaap_ImpairmentOfRealEstate | 37,600,000 us-gaap_ImpairmentOfRealEstate
Estimate of Fair Value, Fair Value Disclosure [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, Fair Value Disclosure |  |  | $ 30,600,000 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember

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- Definition Inventory Impacted by Pretax Noncash Inventory Impairment Charges, Carrying Value + References No definition available. + Details
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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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- Definition The charge against earnings in the period to reduce the carrying amount of real property to fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2921-110230 + Details
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