Segment Information, Nature of Operations, and Certain Concentrations - Revenues (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting, Revenue Reconciling Item [Line Items]
Consolidated revenues	$ 8,951,025	$ 7,536,923	$ 7,388,664
Home Building
Segment Reporting, Revenue Reconciling Item [Line Items]
Consolidated revenues	8,701,693	7,328,889	7,220,844
Home Building | Mid Atlantic
Segment Reporting, Revenue Reconciling Item [Line Items]
Consolidated revenues	4,049,871	3,668,542	3,901,573
Home Building | North East
Segment Reporting, Revenue Reconciling Item [Line Items]
Consolidated revenues	767,828	538,772	514,804
Home Building | Mid East
Segment Reporting, Revenue Reconciling Item [Line Items]
Consolidated revenues	1,891,729	1,524,667	1,501,139
Home Building | South East
Segment Reporting, Revenue Reconciling Item [Line Items]
Consolidated revenues	1,992,265	1,596,908	1,303,328
Mortgage Banking
Segment Reporting, Revenue Reconciling Item [Line Items]
Consolidated revenues	$ 249,332	$ 208,034	$ 167,820