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Mortgages and Notes Payable (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended		3 Months Ended					3 Months Ended
	Feb. 29, 2012	Nov. 30, 2011	Feb. 29, 2012 Senior notes due 2014 at 5 3/4% [Member]	Feb. 29, 2012 Senior notes due 2015 at 5 7/8% [Member]	Feb. 29, 2012 Senior notes due 2015 at 6 1/4% [Member]	Feb. 29, 2012 Senior notes due 2017 at 9.10% [Member]	Feb. 29, 2012 Senior notes due 2018 at 7 1/4% [Member]	Feb. 29, 2012 Senior notes due 2020 at 8.00% [Member]	Feb. 07, 2012 Senior notes due 2020 at 8.00% [Member]
Mortgages and Notes Payable Additional (Textual) [Abstract]
Senior notes						$ 265.0		$ 350.0
Senior notes, rate			5.75%	5.875%	6.25%	9.10%	7.25%	8.00%
Maturity Date								Mar. 15, 2020
Percentage of price equal to the redemption value of senior notes								100.00%
Total consideration paid to purchase the notes	340.5		56.3	130.0	153.7
Percentage of principal amount for purchase of notes if change in control									101.00%
Mortgages and Notes Payable (Textual) [Abstract]
Letter of credit facility outstanding	61.8	63.8
Letter of Credit Facility, collateral amount	0	64.5
Loss on early redemption of debt	2.0
Principal payments on senior notes, mortgages and land contracts due to land sellers and other loans due 2012	23.3
Principal payments on senior notes, mortgages and land contracts due to land sellers and other loans due 2013	0
Principal payments on senior notes, mortgages and land contracts due to land sellers and other loans due 2014	193.4
Principal payments on senior notes, mortgages and land contracts due to land sellers and other loans due 2015	465.8
Principal payments on senior notes, mortgages and land contracts due to land sellers and other loans due 2016	0
Principal payments on senior notes, mortgages and land contracts due to land sellers and other loans due thereafter	$ 904.9

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The stated principal amount of the debt instrument at time of issuance, which may vary from the carrying amount because of unamortized premium or discount.

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