Segment Disclosures - Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 6,407,288	$ 6,601,757
Finance Lease, Right-of-Use Asset	29,838	13,310
Contract land deposit reserve	(44,607)	(53,397)
Home Building Segment
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	5,863,096	6,142,087
Cash and cash equivalents	2,438,473	3,126,472
Operating lease right-of-use assets	73,345	70,384
Mortgage Banking
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	544,192	459,670
Cash and cash equivalents	31,123	36,422
Operating lease right-of-use assets	20,758	23,541
Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	3,639,156	3,184,246
Operating Segments | Home Building Segment | Mid Atlantic
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	1,349,090	1,252,360
Operating Segments | Home Building Segment | North East
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	375,447	314,904
Operating Segments | Home Building Segment | Mid East
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	433,214	368,154
Operating Segments | Home Building Segment | South East
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	944,560	796,505
Operating Segments | Mortgage Banking
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	536,845	452,323
Segment Reconciling Items
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	2,768,132	3,417,511
Deferred taxes	152,359	148,005
Intangible assets and goodwill	49,368	49,368
Finance Lease, Right-of-Use Asset	29,838	13,310
Contract land deposit reserve	(44,607)	(53,397)
Consolidation adjustments and other	$ 69,356	$ 63,369