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Segment Information, Nature of Operations, and Certain Concentrations - Corporate Capital Allocation Charge (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Corporate Reconciling Items And Eliminations [Member] |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Corporate capital allocation charge | $ (288,805) | $ (302,904) | $ (252,787)
Corporate Reconciling Items And Eliminations [Member] | Home Building | Mid Atlantic |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Corporate capital allocation charge | (135,618) | (143,251) | (124,316)
Corporate Reconciling Items And Eliminations [Member] | Home Building | North East |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Corporate capital allocation charge | (33,269) | (30,623) | (25,431)
Corporate Reconciling Items And Eliminations [Member] | Home Building | Mid East |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Corporate capital allocation charge | (39,005) | (51,376) | (43,686)
Corporate Reconciling Items And Eliminations [Member] | Home Building | South East |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Corporate capital allocation charge | (80,913) | (77,654) | (59,354)
Reconciling items: |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Corporate capital allocation charge | $ (288,805) | $ (302,904) | $ (252,787)

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