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Mortgages and Notes Payable (Schedule of Mortages and Notes Payable) (Details) (USD $) |  |  | 3 Months Ended |  |  |  | 0 Months Ended |  |  |  | 0 Months Ended |  |  |  | 0 Months Ended |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 Months Ended |  |
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Nov. 30, 2013 | Nov. 30, 2012 | Nov. 30, 2013 Senior notes due February 1, 2014 at 5 3/4% | Nov. 30, 2013 Senior notes due January 15, 2015 at 5 7/8% | Jan. 29, 2013 Convertible senior notes due February 1, 2019 at 1.375% | Nov. 30, 2013 Convertible Senior Notes Due Two Thousand Nineteen At One Point Three Seven Five Percent [Member] | Nov. 30, 2013 Mortgages and land contracts due to land sellers and other loans (at interest rates of 7% at November 30, 2013 and 6% to 7% at November 30, 2012) | Nov. 30, 2012 Mortgages and land contracts due to land sellers and other loans (at interest rates of 7% at November 30, 2013 and 6% to 7% at November 30, 2012) | Nov. 30, 2012 Mortgages and land contracts due to land sellers and other loans (at interest rates of 7% at November 30, 2013 and 6% to 7% at November 30, 2012) Minimum | Nov. 30, 2012 Mortgages and land contracts due to land sellers and other loans (at interest rates of 7% at November 30, 2013 and 6% to 7% at November 30, 2012) Maximum | Jul. 31, 2012 Senior Notes [Member] | Feb. 07, 2012 Senior Notes [Member] | Oct. 29, 2013 Senior Notes [Member] Senior notes due February 1, 2014 at 5 3/4% | Nov. 30, 2013 Senior Notes [Member] Senior notes due February 1, 2014 at 5 3/4% | Nov. 30, 2012 Senior Notes [Member] Senior notes due February 1, 2014 at 5 3/4% | Jan. 28, 2004 Senior Notes [Member] Senior notes due February 1, 2014 at 5 3/4% | Oct. 29, 2013 Senior Notes [Member] Senior notes due January 15, 2015 at 5 7/8% | Nov. 30, 2013 Senior Notes [Member] Senior notes due January 15, 2015 at 5 7/8% | Nov. 30, 2012 Senior Notes [Member] Senior notes due January 15, 2015 at 5 7/8% | Dec. 15, 2004 Senior Notes [Member] Senior notes due January 15, 2015 at 5 7/8% | Oct. 29, 2013 Senior Notes [Member] Senior notes due June 15, 2015 at 6 1/4% | Nov. 30, 2013 Senior Notes [Member] Senior notes due June 15, 2015 at 6 1/4% | Nov. 30, 2012 Senior Notes [Member] Senior notes due June 15, 2015 at 6 1/4% | Jun. 02, 2005 Senior Notes [Member] Senior notes due June 15, 2015 at 6 1/4% | Nov. 30, 2013 Senior Notes [Member] Senior notes due September 15, 2017 at 9.10% | Nov. 30, 2012 Senior Notes [Member] Senior notes due September 15, 2017 at 9.10% | Nov. 30, 2013 Senior Notes [Member] Senior notes due June 15, 2018 at 7 1/4% | Nov. 30, 2012 Senior Notes [Member] Senior notes due June 15, 2018 at 7 1/4% | Apr. 03, 2006 Senior Notes [Member] Senior notes due June 15, 2018 at 7 1/4% | Nov. 30, 2013 Senior Notes [Member] Senior notes due March 15, 2020 at 8.00% | Nov. 30, 2012 Senior Notes [Member] Senior notes due March 15, 2020 at 8.00% | Feb. 07, 2012 Senior Notes [Member] Senior notes due March 15, 2020 at 8.00% | Nov. 30, 2013 Senior Notes [Member] Senior notes due December 15, 2021 at 7.00% | Oct. 29, 2013 Senior Notes [Member] Senior notes due December 15, 2021 at 7.00% | Nov. 30, 2012 Senior Notes [Member] Senior notes due December 15, 2021 at 7.00% | Nov. 30, 2013 Senior Notes [Member] Senior notes due September 15, 2022 at 7.50% | Nov. 30, 2012 Senior Notes [Member] Senior notes due September 15, 2022 at 7.50% | Jul. 31, 2012 Senior Notes [Member] Senior notes due September 15, 2022 at 7.50% | Jan. 29, 2013 Convertible Notes Payable [Member] Convertible senior notes due February 1, 2019 at 1.375% | Nov. 30, 2013 Convertible Notes Payable [Member] Convertible senior notes due February 1, 2019 at 1.375% | Nov. 30, 2012 Convertible Notes Payable [Member] Convertible senior notes due February 1, 2019 at 1.375%
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Convertible Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 222,700,000 |  |
Extinguishment of Debt, Amount |  |  | 56,300,000 | 11,000,000 |  |  |  |  |  |  | 244,900,000 | 340,000,000 | 19,700,000 |  |  |  | 91,100,000 |  |  |  | 37,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior notes, rate |  |  |  |  | 1.375% | 1.375% | 7.00% |  | 6.00% | 7.00% |  |  |  | 5.75% | 5.75% | 5.75% |  | 5.88% | 5.88% | 5.875% |  | 6.25% | 6.25% | 6.25% |  |  | 7.25% | 7.25% | 7.25% | 8.00% | 8.00% | 8.00% | 7.00% | 7.00% |  | 7.50% | 7.50% | 7.50% |  |  |
Mortgages and notes payable | $ 2,150,498,000 | $ 1,722,815,000 |  |  |  |  | $ 13,615,000 | $ 52,311,000 |  |  |  |  |  | $ 0 | $ 75,911,000 |  |  | $ 0 | $ 101,999,000 |  |  | $ 199,864,000 | $ 236,826,000 |  | $ 262,048,000 | $ 261,430,000 | $ 299,261,000 | $ 299,129,000 |  | $ 345,710,000 | $ 345,209,000 |  | $ 450,000,000 |  | $ 0 | $ 350,000,000 | $ 350,000,000 |  |  | $ 230,000,000 | $ 0

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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 Gross amount of debt extinguished. + References No definition available. + Details
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- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of all notes and loans payable (with maturities initially due after one year or beyond the operating cycle if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 7 Reference 2: 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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition The cash inflow from the issuance of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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