Financial Services (Schedule of Assets and Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	May 31, 2013	Nov. 30, 2012	May 31, 2012	Nov. 30, 2011
Assets
Cash and cash equivalents	$ 541,206	$ 525,688	$ 317,961	$ 418,074
Receivables	66,121	64,821
Investments in unconsolidated joint ventures	122,800	123,674
Other assets	103,797	95,050
Total assets	2,912,121	2,561,698
Liabilities
Accounts payable and accrued expenses	495,953	458,889
Total liabilities	2,077	3,188
Financial services [Member]
Assets
Cash and cash equivalents	2,635	923	3,703
Receivables	964	1,859
Investments in unconsolidated joint ventures	5,503	1,630
Other assets	18	43
Total assets	9,120	4,455
Liabilities
Accounts payable and accrued expenses	$ 2,077	$ 3,188