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Segment Information, Nature of Operations, and Certain Concentrations - Profit before Taxes (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Profit before taxes | $ 2,115,506 | $ 1,928,373 | $ 2,253,194
Equity-based compensation expense | (73,925) | (99,507) | (82,537)
Home Building |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Profit before taxes | 1,960,571 | 1,795,580 | 2,131,044
Mortgage Banking |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Profit before taxes | 154,935 | 132,793 | 122,150
Operating Segments |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Profit before taxes | 1,871,673 | 1,751,051 | 2,197,382
Operating Segments | Home Building | Mid Atlantic |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Profit before taxes | 816,255 | 745,323 | 994,027
Operating Segments | Home Building | North East |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Profit before taxes | 217,225 | 169,012 | 157,333
Operating Segments | Home Building | Mid East |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Profit before taxes | 290,834 | 257,865 | 343,236
Operating Segments | Home Building | South East |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Profit before taxes | 388,158 | 440,538 | 577,030
Operating Segments | Mortgage Banking |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Profit before taxes | 159,201 | 138,313 | 125,756
Corporate And Reconciling Items |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Profit before taxes | 243,833 | 177,322 | 55,812
Contract land deposit reserve adjustment | 6,228 | 3,279 | (27,300)
Equity-based compensation expense | (73,925) | (99,507) | (82,537)
Corporate capital allocation charge | 330,897 | 288,805 | 302,904
Unallocated Corporate Overhead | (156,470) | (175,208) | (129,998)
Consolidation Adjustments And Other | 26,424 | 44,619 | (1,719)
Corporate interest income | 137,530 | 142,083 | 32,457
Corporate interest expense | $ (26,851) | $ (26,749) | $ (37,995)

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