Investments in Unconsolidated Joint Ventures (Financial Information for Unconsolidated Joint Ventures) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Feb. 28, 2013	Feb. 29, 2012	Nov. 30, 2012
Statements of operations of unconsolidated joint venture
Revenues	$ 0	$ 0
Construction and land costs	0	6
Other expenses, net	(855)	(461)
Income (loss)	(855)	(455)
Assets
Cash	15,998		29,721
Receivables	6,603		6,104
Inventories	361,158		352,791
Other assets	1,182		1,175
Total assets	384,941		389,791
Liabilities and equity
Accounts payable and other liabilities	86,506		88,027
Equity	298,435		301,764
Total liabilities and equity	$ 384,941		$ 389,791