Segment Information, Nature of Operations, and Certain Concentrations - Interest Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting, Other Significant Reconciling Item [Line Items]
Consolidated interest expense	$ 53,117	$ 40,872	$ 25,380
Home Building
Segment Reporting, Other Significant Reconciling Item [Line Items]
Consolidated interest expense	51,530	39,458	24,335
Mortgage Banking
Segment Reporting, Other Significant Reconciling Item [Line Items]
Consolidated interest expense	1,587	1,414	1,045
Profit before taxes:
Segment Reporting, Other Significant Reconciling Item [Line Items]
Consolidated interest expense	254,511	240,749	225,627
Profit before taxes: | Home Building | Mid Atlantic
Segment Reporting, Other Significant Reconciling Item [Line Items]
Consolidated interest expense	124,385	124,486	123,178
Profit before taxes: | Home Building | North East
Segment Reporting, Other Significant Reconciling Item [Line Items]
Consolidated interest expense	25,463	22,859	19,804
Profit before taxes: | Home Building | Mid East
Segment Reporting, Other Significant Reconciling Item [Line Items]
Consolidated interest expense	43,695	40,261	37,266
Profit before taxes: | Home Building | South East
Segment Reporting, Other Significant Reconciling Item [Line Items]
Consolidated interest expense	59,381	51,729	44,334
Profit before taxes: | Mortgage Banking
Segment Reporting, Other Significant Reconciling Item [Line Items]
Consolidated interest expense	1,587	1,414	1,045
Reconciling items:
Segment Reporting, Other Significant Reconciling Item [Line Items]
Consolidated interest expense	51,393	39,356	24,221
Corporate capital allocation charge	$ (252,787)	$ (239,233)	$ (224,468)