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Fair Value Disclosures (Details Textual) (USD $) | 3 Months Ended | 12 Months Ended |  |  | 12 Months Ended |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Nov. 30, 2011 | Aug. 31, 2011 | May 31, 2011 | Feb. 28, 2011 | Nov. 30, 2010 | Aug. 31, 2010 | Feb. 28, 2010 | Nov. 30, 2011 | Nov. 30, 2010 | Nov. 30, 2009 | Aug. 15, 2011 | Jul. 30, 2009 | Nov. 30, 2011 Fair Value, Measurements, Nonrecurring [Member] | Nov. 30, 2010 Fair Value, Measurements, Nonrecurring [Member] | Nov. 30, 2011 Estimate of Fair Value, Fair Value Disclosure [Member] | Nov. 30, 2010 Estimate of Fair Value, Fair Value Disclosure [Member] | Nov. 30, 2011 Senior notes due 2011 at 6 3/8% [Member] | Nov. 30, 2011 Senior notes due 2014 at 5 3/4% [Member] | Jan. 28, 2004 Senior notes due 2014 at 5 3/4% [Member] | Nov. 30, 2011 Senior notes due 2015 at 5 7/8% [Member] | Dec. 15, 2004 Senior notes due 2015 at 5 7/8% [Member] | Nov. 30, 2011 Senior notes due 2015 at 6 1/4% [Member] | Jun. 02, 2005 Senior notes due 2015 at 6 1/4% [Member] | Nov. 30, 2011 Senior notes due 2017 at 9.1% [Member] | Nov. 30, 2011 Senior notes due 2018 at 7 1/4% [Member] | Apr. 03, 2006 Senior notes due 2018 at 7 1/4% [Member]
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior notes, rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6.375% | 5.75% | 5.75% | 5.875% | 5.875% | 6.25% | 6.25% | 9.10% | 7.25% | 7.25%
Additional Fair Value Disclosures (Textual) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-lived assets held and used |  |  |  |  |  |  |  |  |  |  |  |  | $ 34,022,000 | $ 11,570,000 | $ 34,000,000 | $ 11,600,000 |  |  |  |  |  |  |  |  |  |
Total inventory impairments | 1,300,000 | 300,000 | 20,100,000 | 1,000,000 | 1,600,000 | 1,400,000 | 6,800,000 | 22,730,000 | 9,815,000 | 120,848,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value Disclosures (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-lived assets held and used, Carrying Value | 56,700,000 |  |  |  | 21,400,000 |  |  | 56,700,000 | 21,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment of aggregate principal amount of senior notes | 100,000,000 |  |  |  |  |  |  | 100,000,000 |  |  | 100,000,000 | 250,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior notes | $ 350,000,000 |  |  |  | $ 265,000,000 |  |  | $ 350,000,000 | $ 265,000,000 |  |  |  |  |  |  |  |  |  | $ 250,000,000 |  | $ 300,000,000 |  | $ 450,000,000 |  |  | $ 300,000,000

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- Definition Charge to cost of goods sold that represents the reduction of the carrying amount of inventory, generally attributable to obsolescence or market conditions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6386783&loc=d3e4542-108314 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Chapter 4 -Section 7 -Paragraph 14 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Concepts (CON) -Number 6 -Paragraph 86 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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