Notes Payable (Narratives) (Details)		3 Months Ended
	Jan. 13, 2017 USD ($)	Feb. 28, 2017 USD ($) $ / shares shares	Feb. 29, 2016 USD ($) shares	Nov. 30, 2016 USD ($)
Debt Instrument [Line Items]
Debt Issuance Costs, Net		$ 19,900,000		$ 21,800,000
Line of Credit Facility, Current Borrowing Capacity		275,000,000
Letters of credit outstanding		$ 31,000,000		31,000,000
Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities (in shares) | shares		8,402,000	8,402,000
Gain (Loss) on Extinguishment of Debt		$ (5,685,000)	$ 0
Notes and Loans Payable		2,504,449,000		2,640,149,000
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months		194,300,000
Long-term Debt, Maturities, Repayments of Principal in Year Two		300,000,000
Long-term Debt, Maturities, Repayments of Principal in Year Three		630,000,000
Long-term Debt, Maturities, Repayments of Principal in Year Four		350,000,000
Long-term Debt, Maturities, Repayments of Principal in Year Five		0
Long-term Debt, Maturities, Repayments of Principal after Year Five		1,050,000,000
Inventories pledged to collateralize mortgages and land contracts, carrying value		$ 60,500,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Unsecured revolving credit facility, expiration date		Aug. 07, 2019
Unsecured revolving credit facility, maximum borrowing capacity		$ 450,000,000
Line of Credit Facility, Amount Outstanding		0
Unsecured revolving credit facility, remaining borrowing capacity		$ 244,000,000
Revolving Credit Facility [Member] | Minimum [Member]
Debt Instrument [Line Items]
Line of credit facility, unused capacity, commitment fee percentage		0.30%
Revolving Credit Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Line of credit facility, unused capacity, commitment fee percentage		0.50%
Letter of Credit [Member]
Debt Instrument [Line Items]
Unsecured revolving credit facility, maximum borrowing capacity		$ 137,500,000
Line of Credit Facility, Amount Outstanding		31,000,000
Unsecured revolving credit facility, remaining borrowing capacity		106,500,000
LOC Facilities [Member]
Debt Instrument [Line Items]
Letters of credit outstanding		0		0
Mortgages and Land Contracts Due to Land Sellers and Other Loans [Member]
Debt Instrument [Line Items]
Notes and Loans Payable		$ 29,313,000		$ 66,927,000
Convertible Notes Payable [Member] | Convertible Senior Notes Due Two Thousand Nineteen At One Point Three Seven Five Percent [Member]
Debt Instrument [Line Items]
Senior notes, rate		1.375%		1.375%
Debt instrument, conversion ratio		0.0365297
Debt instrument, convertible, conversion price (in dollars per share) | $ / shares		$ 27.37
Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities (in shares) | shares		8,401,831
Notes and Loans Payable		$ 227,676,000		$ 227,379,000
Senior Notes [Member] | Senior notes due June 15, 2018 at 7 1/4%
Debt Instrument [Line Items]
Senior notes, rate		7.25%		7.25%
Notes and Loans Payable		$ 299,701,000		$ 299,647,000
Senior Notes [Member] | Senior notes due September 15, 2017 at 9.10%
Debt Instrument [Line Items]
Senior notes, rate		9.10%		9.10%
Notes and Loans Payable		$ 164,538,000		$ 263,932,000
Senior Notes [Member] | Senior Notes Due Two Thousand Nineteen at Four Point Seven Five Percent [Member]
Debt Instrument [Line Items]
Senior notes, rate		4.75%		4.75%
Notes and Loans Payable		$ 397,617,000		$ 397,364,000
Senior Notes [Member] | Senior notes due March 15, 2020 at 8.00%
Debt Instrument [Line Items]
Senior notes, rate		8.00%		8.00%
Notes and Loans Payable		$ 345,156,000		$ 344,811,000
Senior Notes [Member] | Senior notes due September 15, 2022 at 7.50%
Debt Instrument [Line Items]
Senior notes, rate		7.50%		7.50%
Notes and Loans Payable		$ 346,886,000		$ 346,774,000
Senior Notes [Member] | Senior Notes Due Two Thousand Twenty Three At Seven Point Six Two Five Percent [Domain]
Debt Instrument [Line Items]
Senior notes, rate		7.625%		7.625%
Notes and Loans Payable		$ 247,482,000		$ 247,404,000
Senior Notes [Member] | Senior Notes Due Two Thousand Seventeen at Nine Point One Percent [Member]
Debt Instrument [Line Items]
Senior notes, rate		9.10%
Extinguishment of Debt, Amount	$ 100,000,000
Debt Instrument Redemption Aggregate Price		$ 105,300,000
Notes and Loans Payable		$ 165,000,000