Financial Services (Details) (USD $)	3 Months Ended		12 Months Ended
	Aug. 31, 2012	Nov. 30, 2011	Nov. 30, 2012	Nov. 30, 2011	Nov. 30, 2010
Financial services:
Insurance commissions			$ 7,140,000	$ 7,188,000	$ 7,235,000
Title services			2,362,000	1,983,000	992,000
Marketing services fees			2,175,000	1,125,000	0
Interest income			6,000	8,000	6,000
Total			11,683,000	10,304,000	8,233,000
Expenses
Expenses			(2,991,000)	(3,512,000)	(3,119,000)
Operating income			8,692,000	6,792,000	5,114,000
Equity in income/gain on wind down of unconsolidated joint venture			2,191,000	19,286,000	7,029,000
Financial services pretax income			10,883,000	26,078,000	12,143,000
Assets
Cash and cash equivalents		3,024,000	923,000	3,024,000
Receivables		25,495,000	1,859,000	25,495,000
Investment in unconsolidated joint venture		3,639,000	1,630,000	3,639,000
Other assets		15,000	43,000	15,000
Financial services		32,173,000	4,455,000	32,173,000
Liabilities
Accounts payable and accrued expenses		7,494,000	3,188,000	7,494,000
Total liabilities		7,494,000	3,188,000	7,494,000
Financial services (Textual) [Abstract]
Distribution received		13,800,000
Receivable from wind down of KBA Mortgage		23,500,000		23,500,000
Equity Method Investment, Realized Gain (Loss) on Disposal	$ 2,100,000	$ 19,800,000