Segment Information, Nature of Operations, and Certain Concentrations - Profit before Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit before taxes	$ 1,928,373	$ 2,253,194	$ 1,590,403
Equity-based compensation expense (2)	(99,507)	(82,537)	(58,234)
Corporate interest expense	(27,740)	(39,524)	(53,117)
Home Building
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit before taxes	1,795,580	2,131,044	1,418,799
Corporate interest expense	(26,875)	(38,140)	(51,530)
Mortgage Banking
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit before taxes	132,793	122,150	171,604
Corporate interest expense	(865)	(1,384)	(1,587)
Profit before taxes:
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit before taxes	1,751,051	2,197,382	1,618,362
Corporate interest expense	(289,796)	(304,433)	(254,511)
Profit before taxes: | Home Building | Mid Atlantic
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit before taxes	745,323	994,027	734,941
Corporate interest expense	(135,679)	(143,322)	(124,385)
Profit before taxes: | Home Building | North East
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit before taxes	169,012	157,333	105,432
Corporate interest expense	(33,310)	(30,658)	(25,463)
Profit before taxes: | Home Building | Mid East
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit before taxes	257,865	343,236	271,756
Corporate interest expense	(39,021)	(51,384)	(43,695)
Profit before taxes: | Home Building | South East
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit before taxes	440,538	577,030	329,982
Corporate interest expense	(80,921)	(77,685)	(59,381)
Profit before taxes: | Mortgage Banking
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit before taxes	138,313	125,756	176,251
Corporate interest expense	(865)	(1,384)	(1,587)
Reconciling items:
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit before taxes	177,322	55,812	(27,959)
Contract land deposit reserve adjustment	3,279	(27,300)	22,163
Equity-based compensation expense (2)	(99,507)	(82,537)	(58,234)
Corporate capital allocation charge	288,805	302,904	252,787
Unallocated corporate overhead	(175,208)	(129,998)	(139,611)
Consolidation adjustments and other (4)	44,619	(1,719)	(56,511)
Corporate interest income	142,083	32,457	2,840
Corporate interest expense	$ (26,749)	$ (37,995)	$ (51,393)