Segment Information, Nature of Operations, and Certain Concentrations - Corporate Capital Allocation Charge (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Corporate Reconciling Items And Eliminations [Member]
Segment Reporting, Other Significant Reconciling Item [Line Items]
Corporate capital allocation charge	$ (252,787)	$ (239,233)	$ (224,468)
Corporate Reconciling Items And Eliminations [Member] | Home Building | Mid Atlantic
Segment Reporting, Other Significant Reconciling Item [Line Items]
Corporate capital allocation charge	(124,316)	(124,426)	(123,130)
Corporate Reconciling Items And Eliminations [Member] | Home Building | North East
Segment Reporting, Other Significant Reconciling Item [Line Items]
Corporate capital allocation charge	(25,431)	(22,850)	(19,755)
Corporate Reconciling Items And Eliminations [Member] | Home Building | Mid East
Segment Reporting, Other Significant Reconciling Item [Line Items]
Corporate capital allocation charge	(43,686)	(40,256)	(37,263)
Corporate Reconciling Items And Eliminations [Member] | Home Building | South East
Segment Reporting, Other Significant Reconciling Item [Line Items]
Corporate capital allocation charge	(59,354)	(51,701)	(44,320)
Reconciling items:
Segment Reporting, Other Significant Reconciling Item [Line Items]
Corporate capital allocation charge	$ (252,787)	$ (239,233)	$ (224,468)