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Segment Information, Nature of Operations, and Certain Concentrations - Depreciation and Amortization (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Consolidated depreciation and amortization | $ 16,916 | $ 17,396 | $ 19,463
Profit before taxes: |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Consolidated depreciation and amortization | 15,277 | 15,315 | 16,678
Profit before taxes: | Home Building | Mid Atlantic |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Consolidated depreciation and amortization | 5,914 | 5,923 | 6,183
Profit before taxes: | Home Building | North East |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Consolidated depreciation and amortization | 1,125 | 1,216 | 1,628
Profit before taxes: | Home Building | Mid East |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Consolidated depreciation and amortization | 3,724 | 3,948 | 4,259
Profit before taxes: | Home Building | South East |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Consolidated depreciation and amortization | 3,218 | 3,093 | 3,325
Profit before taxes: | Mortgage Banking |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Consolidated depreciation and amortization | 1,296 | 1,135 | 1,283
Other unallocated interest income |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Consolidated depreciation and amortization | $ 1,639 | $ 2,081 | $ 2,785

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