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Segment Disclosures - Corporate Capital Allocation Change (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2014 | Mar. 31, 2013
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |
Corporate Capital Allocation | $ 28,966 | $ 25,618
Operating Segments [Member] | Homebuilding Mid Atlantic [Member] |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |
Corporate Capital Allocation | 18,156 | 16,107
Operating Segments [Member] | Homebuilding North East [Member] |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |
Corporate Capital Allocation | 2,449 | 1,994
Operating Segments [Member] | Homebuilding Mid East [Member] |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |
Corporate Capital Allocation | 5,298 | 5,015
Operating Segments [Member] | Homebuilding South East [Member] |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |
Corporate Capital Allocation | $ 3,063 | $ 2,502

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Period Type: | duration

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- Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
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