Product Warranty (Schedule Of Product Warranty Reserve) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Feb. 28, 2015		Feb. 28, 2014
Product Warranties Disclosures [Abstract]
Warranty reserve, beginning of period	$ 115,927		$ 102,580
Warranties issued during the period	13,323		10,392
Adjustments to pre-existing warranties from changes in estimates	3,661	[1]	2,120	[1]
Payments	(16,640)		(13,995)
Warranty reserve, end of period	$ 116,271		$ 101,097

[1] The adjustments to pre-existing warranties from changes in estimates during the three months ended February 28, 2015 and 2014 primarily related to specific claims related to certain of our homebuilding communities and other adjustments.