Financial Services (Schedule of Assets and Liabilities) (Details) - USD ($) $ in Thousands	Aug. 31, 2018	Nov. 30, 2017	Aug. 31, 2017	Nov. 30, 2016
Assets
Cash and cash equivalents	$ 354,976	$ 720,861	$ 494,807	$ 593,000
Receivables	279,608	244,213
Investments in unconsolidated joint ventures	62,436	64,794
Other assets	108,919	102,498
Total assets	4,974,689	5,041,515
Liabilities
Accounts payable and accrued expenses	894,413	789,393
Total liabilities	1,200	966
Financial services [Member]
Assets
Cash and cash equivalents	615	231	$ 754
Receivables	2,358	1,724
Investments in unconsolidated joint ventures	8,408	10,340
Other assets	160	62
Total assets	11,541	12,357
Liabilities
Accounts payable and accrued expenses	$ 1,200	$ 966