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Goodwill (Changes In Goodwill) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Jun. 30, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Segment Reporting Information
Goodwill, Beginning balance				$ 240,541	$ 895,918	$ 0
Additions					2,514	1,458,908
Impairments	(240,541)	(654,900)	(1,400)	(240,541)	(656,298)	(562,990)
Disposals			(1,593)		(1,593)
Goodwill, Ending balance				0	240,541	895,918
Northeast [Member]
Segment Reporting Information
Goodwill, Beginning balance				0	0	0
Additions					494	285,678
Impairments				0	(494)	(285,678)
Disposals					0
Goodwill, Ending balance				0	0	0
Southeast [Member]
Segment Reporting Information
Goodwill, Beginning balance				60,494	327,033	0
Additions					610	353,882
Impairments				(60,494)	(267,149)	(26,849)
Disposals					0
Goodwill, Ending balance				0	60,494	327,033
Florida [Member]
Segment Reporting Information
Goodwill, Beginning balance				0	5,465	0
Additions					79	45,838
Impairments				0	(5,544)	(40,373)
Disposals					0
Goodwill, Ending balance				0	0	5,465
Texas [Member]
Segment Reporting Information
Goodwill, Beginning balance				92,095	347,969	0
Additions					600	347,969
Impairments				(92,095)	(256,474)	0
Disposals					0
Goodwill, Ending balance				0	92,095	347,969
North [Member]
Segment Reporting Information
Goodwill, Beginning balance				65,356	160,095	0
Additions					468	272,744
Impairments				(65,356)	(95,207)	(112,649)
Disposals					0
Goodwill, Ending balance				0	65,356	160,095
Southwest [Member]
Segment Reporting Information
Goodwill, Beginning balance				22,596	53,763	0
Additions					263	151,204
Impairments				(22,596)	(31,430)	(97,441)
Disposals					0
Goodwill, Ending balance				0	22,596	53,763
Financial Services [Member]
Segment Reporting Information
Goodwill, Beginning balance				0	1,593	0
Additions					0	1,593
Impairments				0	0	0
Disposals					(1,593)
Goodwill, Ending balance				$ 0	$ 0	$ 1,593

X

- Definition

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

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The aggregate amount of goodwill acquired in the period and allocated to the reportable segment. The value is stated at fair value based on the purchase price allocation.

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Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment.

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Write-off of the carrying amount of goodwill associated with all or a portion of a reporting unit that is sold in the period.

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