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Segment Disclosures - Income before Taxes (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Income before taxes | $ 444,073 | $ 538,612 | $ 1,293,210 | $ 1,542,872
Equity-based compensation expense |  |  | (53,695) | (54,465)
Home Building Segment |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Income before taxes | 411,354 | 503,667 | 1,198,355 | 1,433,881
Mortgage Banking |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Income before taxes | 32,719 | 34,945 | 94,855 | 108,991
Operating Segments |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Income before taxes | 386,614 | 483,008 | 1,155,029 | 1,375,094
Operating Segments | Home Building Segment | Mid Atlantic |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Income before taxes | 168,141 | 214,132 | 546,364 | 613,262
Operating Segments | Home Building Segment | North East |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Income before taxes | 51,964 | 56,246 | 165,039 | 157,476
Operating Segments | Home Building Segment | Mid East |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Income before taxes | 76,431 | 81,385 | 191,769 | 211,374
Operating Segments | Home Building Segment | South East |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Income before taxes | 56,872 | 95,089 | 154,120 | 280,936
Operating Segments | Mortgage Banking |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Income before taxes | 33,206 | 36,156 | 97,737 | 112,046
Corporate and Reconciling Items |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Income before taxes | 57,459 | 55,604 | 138,181 | 167,778
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Contract land deposit reserve adjustment | (18,634) | (3,079) | (39,904) | 5,712
Equity-based compensation expense | (17,356) | (19,223) | (53,695) | (54,465)
Corporate capital allocation | (96,562) | (86,489) | (276,087) | (246,044)
Unallocated corporate overhead | (26,359) | (36,780) | (116,692) | (122,300)
Consolidation adjustments and other | 10,433 | 2,575 | 27,903 | 6,666
Segment Reporting, Reconciling Item, Corporate Nonsegment |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Corporate Interest Expense | (6,841) | (6,787) | (20,647) | (20,052)
Interest income | $ 19,654 | $ 32,409 | $ 65,129 | $ 106,173

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