Investments in Unconsolidated Joint Ventures (Financial Information for Unconsolidated Joint Ventures) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Aug. 31, 2020	Aug. 31, 2019	Aug. 31, 2020	Aug. 31, 2019	May 31, 2020	Nov. 30, 2019	May 31, 2019	Nov. 30, 2018
Assets
Other Assets		$ 125,242		$ 125,242			$ 83,041
Total assets		5,177,427		5,177,427			5,015,482
Liabilities and equity
Equity		2,565,308	$ 2,262,229	2,565,308	$ 2,262,229	$ 2,490,354	2,383,122	$ 2,195,210	$ 2,087,500
Total liabilities and stockholders’ equity		5,177,427		5,177,427			5,015,482
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member]
Schedule of Equity Method Investments [Line Items]
Cash		35,674		35,674			23,965
Statements of operations of unconsolidated joint venture
Revenues		21,473	5,729	115,893	21,707
Cost of Revenue		(15,960)	(5,686)	(84,228)	(21,704)
Other Nonoperating Income (Expense)		(1,606)	(708)	(7,455)	(1,946)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		3,907	$ (665)	24,210	$ (1,943)
Assets
Inventory, Real Estate		71,911		71,911			139,536
Other Assets		713		713			792
Total assets		108,298		108,298			164,293
Other Accounts Payable and Accrued Liabilities		12,073		12,073			13,282
Liabilities and equity
Notes Payable	[1]	0		0			40,672
Equity		96,225		96,225			110,339
Total liabilities and stockholders’ equity		$ 108,298		$ 108,298			$ 164,293

[1] As of both August 31, 2020 and November 30, 2019, we had investments in five unconsolidated joint ventures. At November 30, 2019, one of our unconsolidated joint ventures had a construction loan agreement with a third-party lender to finance its land development activities. The outstanding debt was secured by the underlying property and related project assets and was non-recourse to us. All the outstanding secured debt was repaid in April 2020. None of our unconsolidated joint ventures had outstanding debt at August 31, 2020.