Notes Payable (Schedule of Notes Payable) (Details) - USD ($)		Nov. 30, 2019	Nov. 04, 2019	Feb. 20, 2019	Nov. 30, 2018	Feb. 17, 2015	Mar. 25, 2014	Oct. 29, 2013	Oct. 29, 2013	Oct. 29, 2013	Jan. 29, 2013	Jul. 31, 2012	Jul. 31, 2012	Jul. 31, 2012	Feb. 07, 2012
Debt Instrument [Line Items]
Notes payable		$ 1,748,747,000			$ 2,060,263,000
Convertible senior notes due February 1, 2019 at 1.375%
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage											1.375%
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)
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		7.00%
Notes payable		$ 7,889,000			$ 40,038,000
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
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage					7.00%
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
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage					7.00%
Senior Notes [Member] | Senior notes due May 15, 2019 at 4.75%
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage					4.75%
Debt Instrument, Interest Rate, Effective Percentage							5.00%
Notes payable		$ 0			$ 399,483,000
Debt Instrument, Face Amount							$ 400,000,000
Senior Notes [Member] | Senior notes due March 15, 2020 at 8.00%
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage					8.00%
Debt Instrument, Interest Rate, Effective Percentage															8.50%
Notes payable		$ 0			$ 347,790,000
Debt Instrument, Face Amount															$ 350,000,000
Senior Notes [Member] | Senior notes due December 15, 2021 at 7.00%
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		7.00%			7.00%
Debt Instrument, Interest Rate, Effective Percentage									7.20%	7.20%
Notes payable		$ 448,164,000			$ 447,359,000
Debt Instrument, Face Amount	[1]							$ 450,000,000
Senior Notes [Member] | Senior notes due September 15, 2022 at 7.50%
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		7.50%			7.50%
Debt Instrument, Interest Rate, Effective Percentage													7.70%	7.70%
Notes payable		$ 348,267,000			$ 347,731,000
Debt Instrument, Face Amount	[2]											$ 350,000,000
Senior Notes [Member] | Senior Notes Due Two Thousand Twenty Three At Seven Point Six Two Five Percent [Domain]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		7.625%			7.625%
Debt Instrument, Interest Rate, Effective Percentage						7.50%
Notes payable		$ 351,748,000			$ 248,074,000
Debt Instrument, Face Amount	[1]					$ 350,000,000
Senior Notes [Member] | Senior Notes Due Two Thousand Twenty Seven At Six Point Eight Seven Five Percent [Domain]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		6.875%
Debt Instrument, Interest Rate, Effective Percentage				7.10%
Notes payable		$ 296,379,000			0
Debt Instrument, Face Amount	[1]			$ 300,000,000
Senior Notes [Member] | Senior Notes Due Two Thousand Twenty Nine At Four Point Eight Percent [Domain] [Domain]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.80%
Debt Instrument, Interest Rate, Effective Percentage			5.00%
Notes payable		$ 296,300,000			$ 0
Debt Instrument, Face Amount	[1]		$ 300,000,000
Convertible Notes Payable [Member] | Convertible senior notes due February 1, 2019 at 1.375%
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage					1.375%
Debt Instrument, Interest Rate, Effective Percentage											1.90%
Notes payable		$ 0			$ 229,788,000
Debt Instrument, Face Amount											$ 230,000,000

[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.

[2] (b) 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 the applicable redemption date.