Segment Information, Nature of Operations, and Certain Concentrations - Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 5,660,973	$ 5,834,475
Contract land deposit reserve	(57,060)	(30,041)
Home Building
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	5,247,170	5,455,443
Cash and cash equivalents	2,503,424	2,545,069
Deferred taxes	143,585	132,894
Operating Lease, Right-of-Use Asset	71,081	59,010
Finance Lease, Right-of-Use Asset, after Accumulated Amortization	13,745	14,578
Mortgage Banking
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	413,803	379,032
Cash and cash equivalents	19,415	28,398
Operating Lease, Right-of-Use Asset	16,011	9,758
Profit before taxes:
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	2,885,777	2,997,449
Profit before taxes: | Home Building | Mid Atlantic
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	1,152,564	1,322,818
Profit before taxes: | Home Building | North East
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	250,001	235,048
Profit before taxes: | Home Building | Mid East
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	378,833	438,700
Profit before taxes: | Home Building | South East
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	697,923	629,198
Profit before taxes: | Mortgage Banking
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	406,456	371,685
Reconciling items:
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	2,775,196	2,837,026
Cash and cash equivalents	2,503,424	2,545,069
Deferred taxes	143,585	132,894
Intangible assets and goodwill	49,368	49,368
Operating Lease, Right-of-Use Asset	71,081	59,010
Finance Lease, Right-of-Use Asset, after Accumulated Amortization	13,745	14,578
Contract land deposit reserve	(57,060)	(30,041)
Consolidation adjustments and other	$ 51,053	$ 66,148