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Segment Information, Nature of Operations, and Certain Concentrations - Interest Expense (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Consolidated interest expense | $ 53,117 | $ 40,872 | $ 25,380
Home Building |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Consolidated interest expense | 51,530 | 39,458 | 24,335
Mortgage Banking |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Consolidated interest expense | 1,587 | 1,414 | 1,045
Profit before taxes: |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Consolidated interest expense | 254,511 | 240,749 | 225,627
Profit before taxes: | Home Building | Mid Atlantic |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Consolidated interest expense | 124,385 | 124,486 | 123,178
Profit before taxes: | Home Building | North East |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Consolidated interest expense | 25,463 | 22,859 | 19,804
Profit before taxes: | Home Building | Mid East |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Consolidated interest expense | 43,695 | 40,261 | 37,266
Profit before taxes: | Home Building | South East |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Consolidated interest expense | 59,381 | 51,729 | 44,334
Profit before taxes: | Mortgage Banking |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Consolidated interest expense | 1,587 | 1,414 | 1,045
Reconciling items: |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Consolidated interest expense | 51,393 | 39,356 | 24,221
Corporate capital allocation charge | $ (252,787) | $ (239,233) | $ (224,468)

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