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Notes Payable (Narrative) (Details) - USD ($) |  | 12 Months Ended |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 29, 2013 | Nov. 30, 2015 | Nov. 30, 2014 | Nov. 30, 2013 | May. 31, 2015 | Feb. 17, 2015 | Mar. 25, 2014 | Oct. 29, 2013 | Jul. 31, 2012 | Feb. 07, 2012 | Jul. 30, 2009 | Apr. 03, 2006
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Current Borrowing Capacity |  | $ 275,000,000 |  |  | $ 200,000,000 |  |  |  |  |  |  |
Line of Credit Facility, Significant Subsidiary Threshold, Percent |  | 5.00% |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Non Guarantor Subsidiary Threshold, Percent |  | 10.00% |  |  |  |  |  |  |  |  |  |
Incremental Common Shares Attributable to Conversion of Debt Securities |  | 8,402,000 | 8,402,000 | 7,044,000 |  |  |  |  |  |  |  |
Letters of Credit Outstanding, Amount |  | $ 33,400,000 | $ 26,700,000 |  |  |  |  |  |  |  |  |
Gain (loss) on early extinguishment of debt |  | 0 | 0 | $ 10,448,000 |  |  |  |  |  |  |  |
Primarily inventories carrying value |  | 136,100,000 |  |  |  |  |  |  |  |  |  |
Repayments of Long-term Debt |  | 199,906,000 | 0 | 225,394,000 |  |  |  |  |  |  |  |
Proceeds from Issuance of Senior Long-term Debt |  | 250,000,000 | $ 400,000,000 | $ 680,000,000 |  |  |  |  |  |  |  |
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Principal payments on senior notes, mortgages and land contracts due to land sellers and other loans due 2013 |  | 35,700,000 |  |  |  |  |  |  |  |  |  |
Principal payments on senior notes, mortgages and land contracts due to land sellers and other loans due 2014 |  | 265,000,000 |  |  |  |  |  |  |  |  |  |
Principal payments on senior notes, mortgages and land contracts due to land sellers and other loans due 2015 |  | 300,000,000 |  |  |  |  |  |  |  |  |  |
Principal payments on senior notes, mortgages and land contracts due to land sellers and other loans due 2016 |  | 630,000,000 |  |  |  |  |  |  |  |  |  |
Principal payments on senior notes, mortgages and land contracts due to land sellers and other loans due 2017 |  | 350,000,000 |  |  |  |  |  |  |  |  |  |
Principal payments on senior notes, mortgages and land contracts due to land sellers and other loans due thereafter |  | $ 1,050,000,000 |  |  |  |  |  |  |  |  |  |
Convertible senior notes due February 1, 2019 at 1.375% |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Senior notes, rate | 1.375% | 1.375% | 1.375% |  |  |  |  |  |  |  |  |
Convertible Notes Payable [Member] | Convertible senior notes due February 1, 2019 at 1.375% |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Conversion Price Premium | 100.00% |  |  |  |  |  |  |  |  |  |  |
Incremental Common Shares Attributable to Conversion of Debt Securities | 8,401,831 |  |  |  |  |  |  |  |  |  |  |
Percentage of Principal Amount for Purchase of Notes if Fundamental Change |  | 100.00% |  |  |  |  |  |  |  |  |  |
Senior notes | $ 230,000,000 |  |  |  |  |  |  |  |  |  |  |
Senior notes, rate |  | 1.375% | 1.375% | 1.375% |  |  |  |  |  |  |  |
Debt Conversion, Converted Instrument, Shares Issued | 36.5297 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Convertible, Conversion Price | $ 27.37 |  |  |  |  |  |  |  |  |  |  |
Proceeds from Convertible Debt |  |  |  | $ 222,700,000 |  |  |  |  |  |  |  |
Mortgages and Land Contracts Due to Land Sellers and Other Loans [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Senior notes, rate |  |  |  | 700.00% |  |  |  |  |  |  |  |
Senior Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Repayments of Senior Debt |  |  |  | $ 215,100,000 |  |  |  |  |  |  |  |
Percentage of principal amount for purchase of notes if change in control |  | 101.00% |  |  |  |  |  |  |  |  |  |
Senior Notes [Member] | Senior Notes Due Two Thousand Twenty Three At Seven Point Six Two Five Percent [Domain] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Conversion Price Premium |  |  |  |  |  | 100.00% |  |  |  |  |  |
Senior notes |  |  |  |  |  | $ 250,000,000 |  |  |  |  |  |
Proceeds from Issuance of Senior Long-term Debt |  | $ 245,400,000 |  |  |  |  |  |  |  |  |  |
Senior notes, rate |  | 7.625% |  |  |  |  |  |  |  |  |  |
Senior Notes [Member] | Senior notes due May 15, 2019 at 4.75% |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Conversion Price Premium |  |  |  |  |  |  | 100.00% |  |  |  |  |
Senior notes |  |  |  |  |  |  | $ 400,000,000 |  |  |  |  |
Senior notes, rate |  | 4.75% | 4.75% |  |  |  |  |  |  |  |  |
Senior Notes [Member] | Senior notes due June 15, 2015 at 6 1/4% |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Repayments of Long-term Debt |  | $ 199,900,000 |  |  |  |  |  |  |  |  |  |
Senior notes, rate |  |  | 6.25% | 6.25% |  |  |  |  |  |  |  |
Senior Notes [Member] | Senior notes due September 15, 2022 at 7.50% |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Conversion Price Premium |  |  |  |  |  |  |  |  | 100.00% |  |  |
Senior notes |  |  |  |  |  |  |  |  | $ 350,000,000 |  |  |
Senior notes, rate |  | 7.00% | 7.00% | 7.00% |  |  |  |  |  |  |  |
Senior Notes [Member] | Senior notes due December 15, 2021 at 7.00% |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Conversion Price Premium |  |  |  |  |  |  |  | 100.00% |  |  |  |
Senior notes |  |  |  |  |  |  |  | $ 450,000,000 |  |  |  |
Senior notes, rate |  | 7.50% | 7.50% | 7.50% |  |  |  |  |  |  |  |
Senior Notes [Member] | Senior notes due September 15, 2017 at 9.10% |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Conversion Price Premium |  |  |  |  |  |  |  |  |  |  | 100.00% |
Senior notes |  |  |  |  |  |  |  |  |  |  | $ 265,000,000 |
Senior notes, rate |  | 9.10% | 9.10% | 9.10% |  |  |  |  |  |  |  |
Senior Notes [Member] | Senior notes due June 15, 2018 at 7 1/4% |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Conversion Price Premium |  |  |  |  |  |  |  |  |  |  |  | 100.00%
Senior notes |  |  |  |  |  |  |  |  |  |  |  | $ 300,000,000
Senior notes, rate |  | 7.25% | 7.25% | 7.25% |  |  |  |  |  |  |  |
Senior Notes [Member] | Senior notes due March 15, 2020 at 8.00% |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Conversion Price Premium |  |  |  |  |  |  |  |  |  | 100.00% |  |
Senior notes |  |  |  |  |  |  |  |  |  | $ 350,000,000 |  |
Senior notes, rate |  | 8.00% | 8.00% | 8.00% |  |  |  |  |  |  |  |
Senior notes due May 15, 2019 at 4.75% |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Senior Long-term Debt |  |  | $ 394,600,000 |  |  |  |  |  |  |  |  |
Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Expiration Date |  | Aug. 07, 2019 |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | $ 450,000,000 |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Amount Outstanding |  | 0 |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Remaining Borrowing Capacity |  | 250,700,000 |  |  |  |  |  |  |  |  |  |
Letter of Credit [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Current Borrowing Capacity |  | 137,500,000 |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Amount Outstanding |  | 24,296,000.000 |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Remaining Borrowing Capacity |  | 113,200,000 |  |  |  |  |  |  |  |  |  |
LOC Facilities [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Letters of Credit Outstanding, Amount |  | $ 9,100,000 | $ 26,700,000 |  |  |  |  |  |  |  |  |
Minimum | Mortgages and Land Contracts Due to Land Sellers and Other Loans [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Senior notes, rate |  | 400.00% | 500.00% | 0.00% |  |  |  |  |  |  |  |
Minimum | Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage |  | 0.30% |  |  |  |  |  |  |  |  |  |
Maximum | Mortgages and Land Contracts Due to Land Sellers and Other Loans [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Senior notes, rate |  | 700.00% | 700.00% |  |  |  |  |  |  |  |  |
Maximum | Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage |  | 0.50% |  |  |  |  |  |  |  |  |  |

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