Fair Value Disclosures (Assets Measured at Fair Value on Nonrecurring Basis) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended		12 Months Ended
	May 31, 2012	May 31, 2013 Fair Value, Measurements, Nonrecurring Level 3		Nov. 30, 2012 Fair Value, Measurements, Nonrecurring Level 3
Assets measured at fair value on a nonrecurring basis
Post Impairment Fair Value	$ 15,200	$ 0	[1]	$ 39,851	[1]

[1] Amounts represent the aggregate fair value for communities or land parcels where we recognized inventory impairment charges during the period, as of the date that the fair value measurements were made. The carrying value for these communities or land parcels may have subsequently increased or decreased from the fair value reflected due to activity that has occurred since the measurement date.