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v3.20.4

Segment Information, Nature of Operations, and Certain Concentrations - Corporate Capital Allocation Charge (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Corporate Reconciling Items And Eliminations [Member] |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Corporate capital allocation charge | $ (239,233) | $ (224,468) | $ (213,903)
Corporate Reconciling Items And Eliminations [Member] | Home Building | Mid Atlantic |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Corporate capital allocation charge | (124,426) | (123,130) | (123,855)
Corporate Reconciling Items And Eliminations [Member] | Home Building | North East |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Corporate capital allocation charge | (22,850) | (19,755) | (17,893)
Corporate Reconciling Items And Eliminations [Member] | Home Building | Mid East |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Corporate capital allocation charge | (40,256) | (37,263) | (35,803)
Corporate Reconciling Items And Eliminations [Member] | Home Building | South East |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Corporate capital allocation charge | (51,701) | (44,320) | (36,352)
Reconciling items: |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Corporate capital allocation charge | $ (239,233) | $ (224,468) | $ (213,903)

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