Investments in Unconsolidated Joint Ventures (Financial Information for Unconsolidated Joint Ventures) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	May 31, 2013	May 31, 2012	May 31, 2013	May 31, 2012	Nov. 30, 2012
Statements of operations of unconsolidated joint venture
Revenues	$ 6,356	$ 0	$ 6,356	$ 0
Construction and land costs	(3,928)	0	(3,928)	6
Other expenses, net	(1,036)	(288)	(1,891)	(749)
Income (loss)	1,392	(288)	537	(743)
Assets
Cash	19,061		19,061		29,721
Receivables	6,360		6,360		6,104
Inventories	358,371		358,371		352,791
Other assets	1,183		1,183		1,175
Total assets	384,975		384,975		389,791
Liabilities and equity
Accounts payable and other liabilities	87,815		87,815		88,027
Equity	297,160		297,160		301,764
Total liabilities and equity	$ 384,975		$ 384,975		$ 389,791