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Inventory And Land Held for Sale (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Inventory And Land Held For Sale [Abstract]
Capitalized interest related to land and community valuation adjustments expensed	$ 1.0	$ 7.6	$ 2.3	$ 13.8
Homebuilding interest costs incurred and directly expensed		0.9		1.5
Number of communities assessed for impairment	15
Discount rate for fair value determination, aggregate average percentage	12.00%
Recognized net realizable value adjustments	0.1	0.6	(0.1)	1.0
Deposits and pre-acquisition costs write-off	$ 2.3	$ 1.1	$ 6.6	$ 4.0