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Segment Disclosures - Corporate Capital Allocation Charge (Detail) - Reconciling Items [Member] - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Segment Reporting Other Significant Reconciling Item [Line Items] |  |  |  |
Corporate capital allocation charge | $ 46,259 | $ 41,398 | $ 90,574 | $ 78,341
Homebuilding [Member] | Mid Atlantic [Member] |  |  |  |
Segment Reporting Other Significant Reconciling Item [Line Items] |  |  |  |
Corporate capital allocation charge | 28,766 | 26,258 | 55,951 | 49,667
Homebuilding [Member] | North East [Member] |  |  |  |
Segment Reporting Other Significant Reconciling Item [Line Items] |  |  |  |
Corporate capital allocation charge | 4,447 | 3,805 | 9,400 | 7,115
Homebuilding [Member] | Mid East [Member] |  |  |  |
Segment Reporting Other Significant Reconciling Item [Line Items] |  |  |  |
Corporate capital allocation charge | 7,458 | 6,672 | 14,157 | 12,607
Homebuilding [Member] | South East [Member] |  |  |  |
Segment Reporting Other Significant Reconciling Item [Line Items] |  |  |  |
Corporate capital allocation charge | $ 5,588 | $ 4,663 | $ 11,066 | $ 8,952

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- Definition The corporate capital allocation charge is eliminated in consolidation and is based on the segment’s average net assets employed. + References No definition available. + Details
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