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Segment Disclosures - Corporate Capital Allocation Charge (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Segment Reporting, Other Significant Reconciling Item [Line Items]
Corporate Capital Allocation	$ 25,618	$ 18,972
Homebuilding Mid Atlantic [Member]
Segment Reporting, Other Significant Reconciling Item [Line Items]
Corporate Capital Allocation	16,107	12,680
Homebuilding North East [Member]
Segment Reporting, Other Significant Reconciling Item [Line Items]
Corporate Capital Allocation	1,994	1,822
Homebuilding Mid East [Member]
Segment Reporting, Other Significant Reconciling Item [Line Items]
Corporate Capital Allocation	5,015	2,742
Homebuilding South East [Member]
Segment Reporting, Other Significant Reconciling Item [Line Items]
Corporate Capital Allocation	$ 2,502	$ 1,728

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- Definition

Corporate capital allocation charge.

+ References

No definition available.

+ Details

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X

- Details

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