Fair Value Disclosures (Fair Value Hierarchy, Carrying Values, and Estimated Fair Values of Financial Instruments) (Details) (USD $)	Aug. 31, 2014	Nov. 30, 2013	Jan. 29, 2013 Convertible Senior Notes Due Two Thousand Nineteen At One Point Three Seven Five Percent [Member] [Member]	Aug. 31, 2014 Carrying Value Level 2	Nov. 30, 2013 Carrying Value Level 2	Aug. 31, 2014 Carrying Value Level 2 Senior Notes [Member]	Nov. 30, 2013 Carrying Value Level 2 Senior Notes [Member]	Aug. 31, 2014 Estimate of Fair Value, Fair Value Disclosure [Member]	Nov. 30, 2013 Estimate of Fair Value, Fair Value Disclosure [Member]	Aug. 31, 2014 Estimate of Fair Value, Fair Value Disclosure [Member] Level 2	Nov. 30, 2013 Estimate of Fair Value, Fair Value Disclosure [Member] Level 2	Aug. 31, 2014 Estimate of Fair Value, Fair Value Disclosure [Member] Level 2 Senior Notes [Member]	Nov. 30, 2013 Estimate of Fair Value, Fair Value Disclosure [Member] Level 2 Senior Notes [Member]	Aug. 31, 2014 Fair Value, Measurements, Nonrecurring [Member]	Nov. 30, 2013 Fair Value, Measurements, Nonrecurring [Member]	Aug. 31, 2014 Fair Value, Measurements, Nonrecurring [Member] Level 2		Nov. 30, 2013 Fair Value, Measurements, Nonrecurring [Member] Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets Held-for-sale, at Carrying Value	$ 9,800,000	$ 1,500,000
Estimated Fair Value						2,307,916,000	1,906,883,000					2,503,228,000	2,069,325,000
Convertible Debt, Fair Value Disclosures				230,000,000	230,000,000					228,850,000	224,825,000
Debt Instrument, Interest Rate, Stated Percentage			1.375%
Assets, Fair Value Disclosure								$ 6,400,000	$ 1,100,000					$ 6,421,000	$ 1,143,000	$ 6,421,000	[1]	$ 0	[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.