Legal Matters (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended			1 Months Ended	9 Months Ended
	Aug. 31, 2012	Aug. 31, 2012 Nevada Development Contract Litigation	Dec. 31, 2007 Nevada Development Contract Litigation acre	Dec. 27, 2011 KB Home Coastal Inc. et al adv. Estancia Coastal	Aug. 31, 2012 Plaintiff	Aug. 31, 2012 Maximum Plaintiff
Loss Contingencies [Line Items]
Acres of purchased land by LVDA			83
Minimum compensatory damages sought by plaintiffs for Nevada Development Contract Litigation		$ 55
Expected interest charges		41.0			0.9
Expected compensatory damages				9.8
Court judgment in favor of the plaintiff in the amount					9.2
Expected legal fees and costs						1.4
Recorded charge to increase accrual	8.8
Accrual for compensatory damage	$ 11.7