Financial Services (Schedule of Assets and Liabilities) (Details) - USD ($) $ in Thousands		Feb. 28, 2017	Nov. 30, 2016	Feb. 29, 2016	Nov. 30, 2015
Assets
Cash and cash equivalents		$ 352,450	$ 593,000	$ 324,856	$ 560,341
Receivables		238,358	231,665
Investments in unconsolidated joint ventures		64,916	64,016
Other assets		96,679	91,145
Total assets		4,922,580	5,131,624
Liabilities
Accounts payable and accrued expenses		680,393	766,327
Total liabilities		1,278	2,003
Financial services [Member]
Assets
Cash and cash equivalents		570	914	$ 1,780
Receivables		1,859	1,764
Investments in unconsolidated joint ventures	[1]	13,051	7,771
Other assets		38	50
Total assets		15,518	10,499
Liabilities
Accounts payable and accrued expenses		1,278	$ 2,003
KBHS, LLC [Member]
Segment Reporting Information [Line Items]
Limited Partners' Contributed Capital		$ 5,300

[1] Our investments in unconsolidated joint ventures as of February 28, 2017 included a $5.3 million capital contribution we made to KBHS in the 2017 first quarter.