Financial Services (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Nov. 30, 2015	Aug. 31, 2015	May. 31, 2015	Feb. 28, 2015	Nov. 30, 2014	Aug. 31, 2014	May. 31, 2014	Feb. 28, 2014	Nov. 30, 2015	Nov. 30, 2014	Nov. 30, 2013	Nov. 30, 2012
Financial services:
Insurance commissions									$ 7,137	$ 6,566	$ 7,177
Title services									3,905	3,593	3,172
Marketing services fees									0	1,147	1,800
Interest income									1	0	3
Total									11,043	11,306	12,152
Expenses
Expenses									(3,711)	(3,446)	(3,042)
Operating income (loss)									138,621	115,969	92,084
Equity in income (loss) of unconsolidated joint ventures									2,488	1,427	(933)
Pretax income (loss)	$ 69,917	$ 33,954	$ 12,673	$ 10,499	$ 28,601	$ 28,661	$ 26,924	$ 10,763	127,043	94,949	38,363
Assets
Cash and cash equivalents	560,341				358,768				560,341	358,768	532,523	$ 525,688
Receivables	152,682				125,488				152,682	125,488
Investments in unconsolidated joint ventures	71,558				79,441				71,558	79,441
Other assets	112,774				114,915				112,774	114,915
Total assets	5,015,371				4,757,550				5,015,371	4,757,550
Liabilities
Accounts payable and accrued expenses	697,184				582,598				697,184	582,598
Total liabilities	1,817				2,517				1,817	2,517
Financial services (Textual) [Abstract]
Equity Method Investment, Realized Gain (Loss) on Disposal											1,100
Financial services [Member]
Expenses
Operating income (loss)									7,332	7,860	9,110
Equity in income (loss) of unconsolidated joint ventures									4,292	686	1,074
Pretax income (loss)									11,624	8,546	10,184
Assets
Cash and cash equivalents	1,299				2,402				1,299	2,402	$ 2,428
Receivables	2,245				1,738				2,245	1,738
Investments in unconsolidated joint ventures	10,440				6,149				10,440	6,149
Other assets	44				197				44	197
Total assets	14,028				10,486				14,028	10,486
Liabilities
Accounts payable and accrued expenses	$ 1,817				$ 2,517				$ 1,817	$ 2,517