Notes Payable (Narrative) (Details) - USD ($) shares in Thousands								12 Months Ended
		Nov. 22, 2019	Nov. 04, 2019	Mar. 08, 2019	Feb. 20, 2019	Feb. 01, 2019	Jun. 15, 2018	Nov. 30, 2019	Nov. 30, 2018	Nov. 30, 2017	Aug. 31, 2019	Feb. 17, 2015	Oct. 29, 2013	Jan. 29, 2013	Jul. 31, 2012
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net								$ 9,100,000	$ 9,800,000
Line of Credit Facility, Current Borrowing Capacity								$ 800,000,000.0			$ 500,000,000.0
Incremental Common Shares Attributable to Conversion of Debt Securities								1,427	8,402	8,402
Letters of Credit Outstanding, Amount								$ 34,700,000	$ 28,000,000.0
Primarily inventories carrying value								29,200,000
Repayments of Long-term Debt								986,231,000	300,000,000	$ 270,326,000
Gain (Loss) on Extinguishment of Debt								(6,800,000)	0	(5,685,000)
Proceeds from Issuance of Senior Long-term Debt								705,250,000	$ 0	$ 0
Proceeds from Debt, Net of Issuance Costs					$ 400,000,000.0
Long-term Debt, Fiscal Year Maturity [Abstract]
Principal payments on senior notes, mortgages and land contracts due to land sellers and other loans due 2019								7,900,000
Principal payments on senior notes, mortgages and land contracts due to land sellers and other loans due 2020								0
Principal payments on senior notes, mortgages and land contracts due to land sellers and other loans due 2021								800,000,000.0
Principal payments on senior notes, mortgages and land contracts due to land sellers and other loans due 2022								350,000,000.0
Principal payments on senior notes, mortgages and land contracts due to land sellers and other loans due 2023								0
Principal payments on senior notes, mortgages and land contracts due to land sellers and other loans due thereafter								$ 600,000,000.0
Convertible senior notes due February 1, 2019 at 1.375%
Debt Instrument [Line Items]
Senior notes, rate														1.375%
Convertible Notes Payable [Member] | Convertible senior notes due February 1, 2019 at 1.375%
Debt Instrument [Line Items]
Senior notes, rate									1.375%
Mortgages and Land Contracts Due to Land Sellers and Other Loans [Member]
Debt Instrument [Line Items]
Senior notes, rate								7.00%
Senior Notes [Member]
Debt Instrument [Line Items]
Percentage of principal amount for purchase of notes if change in control								101.00%
Senior Notes [Member] | Senior Notes Due Two Thousand Twenty Nine At Four Point Eight Percent [Domain] [Domain]
Debt Instrument [Line Items]
Conversion Price Premium								100.00%
Senior notes, rate								4.80%
Proceeds from Issuance of Senior Long-term Debt			$ 300,000,000.0
Proceeds from Debt, Net of Issuance Costs			$ 296,300,000
Senior Notes [Member] | Convertible senior notes due February 1, 2019 at 1.375%
Debt Instrument [Line Items]
Repayments of Long-term Debt	[1]					$ 230,000,000.0
Senior Notes [Member] | Senior Notes Due Two Thousand Twenty Seven At Six Point Eight Seven Five Percent [Domain]
Debt Instrument [Line Items]
Conversion Price Premium								100.00%
Senior notes, rate								6.875%
Proceeds from Issuance of Senior Long-term Debt					300,000,000.0
Debt Instrument, Redemption Price, Percentage								100.00%
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, rate								7.625%	7.625%
Proceeds from Issuance of Senior Long-term Debt					$ 100,000,000.0
Debt Instrument, Redemption Price, Percentage								105.25%
Senior Notes [Member] | Senior notes due May 15, 2019 at 4.75%
Debt Instrument [Line Items]
Repayments of Long-term Debt	[1]			$ 400,000,000.0
Senior notes, rate									4.75%
Senior Notes [Member] | Senior notes due September 15, 2022 at 7.50%
Debt Instrument [Line Items]
Conversion Price Premium															100.00%
Senior notes, rate								7.50%	7.50%
Senior Notes [Member] | Senior notes due December 15, 2021 at 7.00%
Debt Instrument [Line Items]
Conversion Price Premium													100.00%
Senior notes, rate								7.00%	7.00%
Senior Notes [Member] | Senior notes due June 15, 2018 at 7 1/4%
Debt Instrument [Line Items]
Repayments of Long-term Debt	[1]						$ 300,000,000.0
Senior Notes [Member] | Senior notes due March 15, 2020 at 8.00%
Debt Instrument [Line Items]
Repayments of Long-term Debt		$ 350,000,000.0
Redemption of Long Term Debt	[1]	$ 356,200,000
Senior notes, rate									8.00%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity								$ 1,000,000,000.00
Line of Credit Facility, Amount Outstanding								0
Line of Credit Facility, Remaining Borrowing Capacity								781,100,000
Letter of Credit [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Current Borrowing Capacity								250,000,000.0
Line of Credit Facility, Amount Outstanding								18,900,000
Line of Credit Facility, Remaining Borrowing Capacity								231,100,000
LOC Facilities [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Current Borrowing Capacity								50,000,000.0
Letters of Credit Outstanding, Amount								$ 15,800,000	$ 0
Minimum | Mortgages and Land Contracts Due to Land Sellers and Other Loans [Member]
Debt Instrument [Line Items]
Senior notes, rate									7.00%
Minimum | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage								0.20%
Maximum | Mortgages and Land Contracts Due to Land Sellers and Other Loans [Member]
Debt Instrument [Line Items]
Senior notes, rate									7.00%
Maximum | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage								0.35%

[1] (a) At our option, these notes may be redeemed, in whole at any time or from time to time in part, at a redemption price equal to the greater of (i) 100% of the principal amount of the notes being redeemed and (ii) the sum of the present values of the remaining scheduled payments of principal and interest on the notes being redeemed (exclusive of interest accrued to the applicable redemption date), discounted to the redemption date at a defined rate, plus, in each case, accrued and unpaid interest on the notes being redeemed to, but excluding, the applicable redemption date, except that three months prior to the stated maturity dates for the 7.00% Senior Notes due 2021 and until their respective maturity, and six months prior to the stated maturity date for the 7.625% Senior Notes due 2023, 6.875% Senior Notes due 2027 and 4.80% Senior Notes due 2029 and until their maturity, the redemption price will be equal to 100% of the principal amount of the notes being redeemed, plus, in each case, accrued and unpaid interest on the notes being redeemed to, but excluding, the applicable redemption date.