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Segment Disclosures - Corporate Capital Allocation Charge (Detail) - Corporate and Reconciling Items - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |  |
Corporate capital allocation charge | $ 63,032 | $ 59,870 | $ 124,583 | $ 116,521
Home Building Segment | Mid Atlantic |  |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |  |
Corporate capital allocation charge | 31,135 | 31,581 | 61,731 | 61,336
Home Building Segment | North East |  |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |  |
Corporate capital allocation charge | 6,457 | 5,790 | 12,495 | 11,349
Home Building Segment | Mid East |  |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |  |
Corporate capital allocation charge | 11,066 | 9,687 | 21,690 | 19,050
Home Building Segment | South East |  |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |  |
Corporate capital allocation charge | $ 14,374 | $ 12,812 | $ 28,667 | $ 24,786

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