Segment Disclosures - Revenues (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 2,776,900	$ 2,395,640	$ 7,814,252	$ 6,720,684
Home Building Segment
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	2,739,445	2,336,615	7,658,734	6,524,886
Home Building Segment | Mid Atlantic
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	1,282,504	1,082,710	3,632,524	3,067,267
Home Building Segment | North East
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	250,067	213,087	663,012	568,524
Home Building Segment | Mid East
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	569,991	503,232	1,552,434	1,406,364
Home Building Segment | South East
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	636,883	537,586	1,810,764	1,482,731
Mortgage Banking
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 37,455	$ 59,025	$ 155,518	$ 195,798