Segment Disclosures - Corporate Capital Allocation Charge (Detail) - Corporate and Reconciling Items - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Segment Reporting, Other Significant Reconciling Item [Line Items]
Corporate capital allocation charge	$ 91,898	$ 82,494	$ 179,525	$ 159,555
Home Building Segment \| Mid Atlantic
Segment Reporting, Other Significant Reconciling Item [Line Items]
Corporate capital allocation charge	37,003	34,978	74,146	68,897
Home Building Segment \| North East
Segment Reporting, Other Significant Reconciling Item [Line Items]
Corporate capital allocation charge	11,290	10,298	21,892	19,878
Home Building Segment \| Mid East
Segment Reporting, Other Significant Reconciling Item [Line Items]
Corporate capital allocation charge	12,033	11,055	23,240	20,920
Home Building Segment \| South East
Segment Reporting, Other Significant Reconciling Item [Line Items]
Corporate capital allocation charge	$ 31,572	$ 26,163	$ 60,247	$ 49,860