Segment Disclosures - Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 5,389,534	$ 5,834,475
Finance Lease, Right-of-Use Asset	13,875	14,578
Contract land deposit reserve	(32,240)	(30,041)
Home Building Segment
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	4,917,894	5,455,443
Cash and cash equivalents	1,748,506	2,545,069
Operating lease right-of-use assets	69,933	59,010
Mortgage Banking
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	471,640	379,032
Cash and cash equivalents	18,431	28,398
Operating lease right-of-use assets	14,534	9,758
Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	3,329,124	2,997,449
Operating Segments | Home Building Segment | Mid Atlantic
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	1,289,036	1,322,818
Operating Segments | Home Building Segment | North East
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	268,794	235,048
Operating Segments | Home Building Segment | Mid East
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	515,947	438,700
Operating Segments | Home Building Segment | South East
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	791,054	629,198
Operating Segments | Mortgage Banking
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	464,293	371,685
Corporate and Reconciling Items
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	2,060,410	2,837,026
Cash and cash equivalents	1,748,506	2,545,069
Deferred taxes	144,590	132,894
Intangible assets and goodwill	49,368	49,368
Operating lease right-of-use assets	69,933	59,010
Finance Lease, Right-of-Use Asset	13,875	14,578
Contract land deposit reserve	(32,240)	(30,041)
Consolidation adjustments and other	$ 66,378	$ 66,148