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Segment Information, Nature of Operations, and Certain Concentrations - Corporate Capital Allocation Charge (Detail) - Reconciling Items [Member] - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Segment Reporting Other Significant Reconciling Item [Line Items] |  |  |
Corporate capital allocation charge | $ 189,992 | $ 171,170 | $ 152,140
Homebuilding [Member] | Mid Atlantic [Member] |  |  |
Segment Reporting Other Significant Reconciling Item [Line Items] |  |  |
Corporate capital allocation charge | 119,758 | 107,705 | 96,328
Homebuilding [Member] | North East [Member] |  |  |
Segment Reporting Other Significant Reconciling Item [Line Items] |  |  |
Corporate capital allocation charge | 18,132 | 16,987 | 12,107
Homebuilding [Member] | Mid East [Member] |  |  |
Segment Reporting Other Significant Reconciling Item [Line Items] |  |  |
Corporate capital allocation charge | 28,303 | 27,263 | 26,299
Homebuilding [Member] | South East [Member] |  |  |
Segment Reporting Other Significant Reconciling Item [Line Items] |  |  |
Corporate capital allocation charge | $ 23,799 | $ 19,215 | $ 17,406

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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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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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- Details
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