Segment Disclosures - Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 5,287,699	$ 5,834,475
Finance Lease, Right-of-Use Asset	14,364	14,578
Contract land deposit reserve	(23,516)	(30,041)
Home Building Segment
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	4,877,577	5,455,443
Cash and cash equivalents	1,483,445	2,545,069
Operating lease right-of-use assets	68,323	59,010
Mortgage Banking
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	410,122	379,032
Cash and cash equivalents	16,158	28,398
Operating lease right-of-use assets	13,405	9,758
Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	3,417,030	2,997,449
Operating Segments | Home Building Segment | Mid Atlantic
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	1,408,484	1,322,818
Operating Segments | Home Building Segment | North East
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	286,776	235,048
Operating Segments | Home Building Segment | Mid East
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	538,877	438,700
Operating Segments | Home Building Segment | South East
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	780,118	629,198
Operating Segments | Mortgage Banking
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	402,775	371,685
Corporate and Reconciling Items
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	1,870,669	2,837,026
Cash and cash equivalents	1,483,445	2,545,069
Deferred taxes	139,263	132,894
Intangible assets and goodwill	49,368	49,368
Operating lease right-of-use assets	68,323	59,010
Finance Lease, Right-of-Use Asset	14,364	14,578
Contract land deposit reserve	(23,516)	(30,041)
Consolidation adjustments and other	$ 139,422	$ 66,148