Segment Information, Nature of Operations, and Certain Concentrations - Profit before Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit before taxes	$ 2,253,194	$ 1,590,403	$ 1,078,033
Equity-based compensation expense (2)	(82,537)	(58,234)	(50,794)
Corporate interest expense	(39,524)	(53,117)	(40,872)
Home Building
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit before taxes	2,131,044	1,418,799	937,960
Corporate interest expense	(38,140)	(51,530)	(39,458)
Mortgage Banking
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit before taxes	122,150	171,604	140,073
Corporate interest expense	(1,384)	(1,587)	(1,414)
Profit before taxes:
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit before taxes	2,197,382	1,618,362	1,005,479
Corporate interest expense	(304,433)	(254,511)	(240,749)
Profit before taxes: | Home Building | Mid Atlantic
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit before taxes	994,027	734,941	437,849
Corporate interest expense	(143,322)	(124,385)	(124,486)
Profit before taxes: | Home Building | North East
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit before taxes	157,333	105,432	50,677
Corporate interest expense	(30,658)	(25,463)	(22,859)
Profit before taxes: | Home Building | Mid East
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit before taxes	343,236	271,756	168,605
Corporate interest expense	(51,384)	(43,695)	(40,261)
Profit before taxes: | Home Building | South East
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit before taxes	577,030	329,982	205,029
Corporate interest expense	(77,685)	(59,381)	(51,729)
Profit before taxes: | Mortgage Banking
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit before taxes	125,756	176,251	143,319
Corporate interest expense	(1,384)	(1,587)	(1,414)
Reconciling items:
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit before taxes	55,812	(27,959)	72,554
Contract land deposit reserve adjustment	(27,300)	22,163	(24,633)
Equity-based compensation expense (2)	(82,537)	(58,234)	(50,794)
Corporate capital allocation charge	302,904	252,787	239,233
Unallocated corporate overhead	(129,998)	(139,611)	(114,921)
Consolidation adjustments and other (4)	(1,719)	(56,511)	54,561
Corporate interest income	32,457	2,840	8,464
Corporate interest expense	$ (37,995)	$ (51,393)	$ (39,356)