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Mortgages and Notes Payable (Narratives) (Details) (USD $) | 3 Months Ended |  |  |  | 0 Months Ended |  | 0 Months Ended |  |  |  | 0 Months Ended |  |  |  |  |  |  |  |
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Feb. 28, 2014 | Feb. 28, 2013 | Nov. 30, 2013 | Feb. 28, 2014 Letter of Credit [Member] | Mar. 12, 2013 Letter of Credit [Member] | Mar. 12, 2013 Revolving Credit Facility [Member] | Feb. 28, 2014 Revolving Credit Facility [Member] | Mar. 12, 2013 Revolving Credit Facility [Member] Minimum [Member] | Mar. 12, 2013 Revolving Credit Facility [Member] Maximum [Member] | Jan. 29, 2013 Convertible Senior Notes Due Two Thousand Nineteen At One Point Three Seven Five Percent [Member] [Member] | Feb. 28, 2014 Mortgages and Land Contracts Due to Land Sellers and Other Loans [Member] | Nov. 30, 2013 Mortgages and Land Contracts Due to Land Sellers and Other Loans [Member] | Jan. 29, 2013 Convertible Notes Payable [Member] Convertible Senior Notes Due Two Thousand Nineteen At One Point Three Seven Five Percent [Member] [Member] | Feb. 28, 2014 Convertible Notes Payable [Member] Convertible Senior Notes Due Two Thousand Nineteen At One Point Three Seven Five Percent [Member] [Member] | Nov. 30, 2013 Convertible Notes Payable [Member] Convertible Senior Notes Due Two Thousand Nineteen At One Point Three Seven Five Percent [Member] [Member] | Feb. 28, 2014 Senior Notes [Member] Senior notes due March 15, 2020 at 8.00% | Nov. 30, 2013 Senior Notes [Member] Senior notes due March 15, 2020 at 8.00% | Feb. 28, 2014 Senior Notes [Member] Senior notes due September 15, 2017 at 9.10% | Nov. 30, 2013 Senior Notes [Member] Senior notes due September 15, 2017 at 9.10% | Feb. 28, 2014 Senior Notes [Member] Senior notes due September 15, 2022 at 7.50% | Nov. 30, 2013 Senior Notes [Member] Senior notes due September 15, 2022 at 7.50%
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Current Borrowing Capacity | $ 200,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unsecured revolving credit facility, expiration date |  |  |  |  |  | Mar. 12, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unsecured revolving credit facility, maximum borrowing capacity |  |  |  |  | 100,000,000 | 300,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, unused capacity, commitment fee percentage |  |  |  |  |  |  |  | 0.50% | 0.75% |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Amount Outstanding |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unsecured revolving credit facility, remaining borrowing capacity |  |  |  | 100,000,000 |  |  | 200,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, significant subsidiary threshold, percent | 5.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, non guarantor subsidiary threshold, percent | 10.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  |  |  |  |  |  |  |  |  | 230,000,000 |  |  |  |  |  |  |  |
Senior notes, rate |  |  |  |  |  |  |  |  |  | 1.375% |  |  | 1.375% |  |  | 8.00% | 8.00% | 9.10% | 9.10% | 7.50% | 7.50%
Percentage of Principal Amount in Relation to Issued Value of Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |  |  |  |  |  |  |
Debt Conversion, Converted Instrument, Shares Issued |  |  |  |  |  |  |  |  |  |  |  |  | 36.5297 |  |  |  |  |  |  |  |
Debt instrument, convertible, conversion price |  |  |  |  |  |  |  |  |  |  |  |  | $ 27.37 |  |  |  |  |  |  |  |
Debt instrument, convertible, conversion premium |  |  |  |  |  |  |  |  |  |  |  |  | 47.00% |  |  |  |  |  |  |  |
Share price |  |  |  |  |  |  |  |  |  |  |  |  | $ 18.62 |  |  |  |  |  |  |  |
Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities | 8,402,000 | 0 |  |  |  |  |  |  |  |  |  |  | 8,401,831 |  |  |  |  |  |  |  |
Percentage of principal amount in relation to redemption value of notes |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |  |  |  |  |  |
Percentage of principal amount for purchase of notes if change in control |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |  |  |  |  |  |
Proceeds from issuance of senior notes |  |  |  |  |  |  |  |  |  |  |  |  | 223,100,000 |  |  |  |  |  |  |  |
Ownership share in guarantor subsidiaries (percent) | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Letters of credit outstanding | 41,700,000 |  | 41,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Inventories pledged to collateralize mortgages and land contracts, carrying value | 101,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notes and Loans Payable | $ 2,175,190,000 |  | $ 2,150,498,000 |  |  |  |  |  |  |  | $ 37,970,000 | $ 13,615,000 |  | $ 230,000,000 | $ 230,000,000 | $ 345,842,000 | $ 345,710,000 | $ 262,213,000 | $ 262,048,000 | $ 350,000,000 | $ 350,000,000

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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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