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Segment Disclosures - Income before Taxes (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Income before taxes | $ 538,515 | $ 434,127 | $ 1,678,472 | $ 1,163,598
Equity-based compensation expense | (26,686) | (15,009) | (58,441) | (42,859)
Corporate interest expense | (7,202) | (13,243) | (32,625) | (39,910)
Home Building Segment |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Income before taxes | 520,929 | 395,108 | 1,582,763 | 1,026,790
Corporate interest expense | (6,854) | (12,838) | (31,510) | (38,694)
Mortgage Banking |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Income before taxes | 17,586 | 39,019 | 95,709 | 136,808
Corporate interest expense | (348) | (405) | (1,115) | (1,216)
Operating Segments |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Income before taxes | 579,450 | 478,347 | 1,645,072 | 1,162,978
Operating Segments | Home Building Segment | Mid Atlantic |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Income before taxes | 272,860 | 222,504 | 774,380 | 526,052
Operating Segments | Home Building Segment | North East |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Income before taxes | 49,614 | 33,885 | 116,839 | 70,622
Operating Segments | Home Building Segment | Mid East |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Income before taxes | 92,364 | 81,021 | 246,059 | 189,849
Operating Segments | Home Building Segment | South East |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Income before taxes | 145,619 | 100,688 | 409,895 | 236,272
Operating Segments | Mortgage Banking |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Income before taxes | 18,993 | 40,249 | 97,899 | 140,183
Corporate and Reconciling Items |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Income before taxes | (40,935) | (44,220) | 33,400 | 620
Contract land deposit reserve adjustment | (8,736) | 4,126 | (2,391) | 17,500
Equity-based compensation expense | (26,686) | (15,009) | (58,441) | (42,859)
Corporate capital allocation | 81,020 | 64,055 | 228,276 | 188,638
Unallocated corporate overhead | (22,565) | (27,801) | (100,109) | (101,605)
Consolidation adjustments and other (4) | (57,165) | (56,786) | (2,561) | (22,456)
Corporate interest expense | (6,803) | (12,805) | (31,374) | (38,598)
Corporate and Reconciling Items | Home Building Segment | Mid Atlantic |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Corporate capital allocation | 37,305 | 31,057 | 108,514 | 92,788
Corporate and Reconciling Items | Home Building Segment | North East |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Corporate capital allocation | 7,994 | 6,719 | 23,238 | 19,214
Corporate and Reconciling Items | Home Building Segment | Mid East |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Corporate capital allocation | 14,509 | 11,114 | 38,801 | 32,804
Corporate and Reconciling Items | Home Building Segment | South East |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Corporate capital allocation | $ 21,212 | $ 15,165 | $ 57,723 | $ 43,832

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