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Fair Value Disclosures (Fair Value Hierarchy, Carrying Values, and Estimated Fair Values of Financial Instruments) (Details) (USD $) | Aug. 31, 2014 | Nov. 30, 2013 | Jan. 29, 2013 Convertible Senior Notes Due Two Thousand Nineteen At One Point Three Seven Five Percent [Member] [Member] | Aug. 31, 2014 Carrying Value Level 2 | Nov. 30, 2013 Carrying Value Level 2 | Aug. 31, 2014 Carrying Value Level 2 Senior Notes [Member] | Nov. 30, 2013 Carrying Value Level 2 Senior Notes [Member] | Aug. 31, 2014 Estimate of Fair Value, Fair Value Disclosure [Member] | Nov. 30, 2013 Estimate of Fair Value, Fair Value Disclosure [Member] | Aug. 31, 2014 Estimate of Fair Value, Fair Value Disclosure [Member] Level 2 | Nov. 30, 2013 Estimate of Fair Value, Fair Value Disclosure [Member] Level 2 | Aug. 31, 2014 Estimate of Fair Value, Fair Value Disclosure [Member] Level 2 Senior Notes [Member] | Nov. 30, 2013 Estimate of Fair Value, Fair Value Disclosure [Member] Level 2 Senior Notes [Member] | Aug. 31, 2014 Fair Value, Measurements, Nonrecurring [Member] | Nov. 30, 2013 Fair Value, Measurements, Nonrecurring [Member] | Aug. 31, 2014 Fair Value, Measurements, Nonrecurring [Member] Level 2 | Nov. 30, 2013 Fair Value, Measurements, Nonrecurring [Member] Level 2
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Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Held-for-sale, at Carrying Value | $ 9,800,000 | $ 1,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated Fair Value |  |  |  |  |  | 2,307,916,000 | 1,906,883,000 |  |  |  |  | 2,503,228,000 | 2,069,325,000 |  |  |  |  |  |
Convertible Debt, Fair Value Disclosures |  |  |  | 230,000,000 | 230,000,000 |  |  |  |  | 228,850,000 | 224,825,000 |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 1.375% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets, Fair Value Disclosure |  |  |  |  |  |  |  | $ 6,400,000 | $ 1,100,000 |  |  |  |  | $ 6,421,000 | $ 1,143,000 | $ 6,421,000 | [1] | $ 0 | [1]
[1] | Amounts represent the aggregate fair value for communities or land parcels where we recognized inventory impairment charges during the period, as of the date that the fair value measurements were made. The carrying value for these communities or land parcels may have subsequently increased or decreased from the fair value reflected due to activity that has occurred since the measurement date.

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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=25499696&loc=d3e19207-110258 + Details
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- Definition Represents the sum of the carrying value of all the Assets Held-for-Sale at the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 + Details
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- Definition Fair value portion of borrowing which can be exchanged for a specified number of another security at the option of the issuer or the holder, for example, but not limited to, the entity's common stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Convertible Security -URI http://asc.fasb.org/extlink&oid=6509036 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Fair value portion of notes payable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20,22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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