Segment Disclosures - Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 6,538,157	$ 6,601,757
Finance Lease, Right-of-Use Asset	14,594	13,310
Contract land deposit reserve	(45,932)	(53,397)
Home Building Segment
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	6,068,981	6,142,087
Cash and cash equivalents	2,841,354	3,126,472
Operating lease right-of-use assets	66,716	70,384
Mortgage Banking
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	469,176	459,670
Cash and cash equivalents	27,803	36,422
Operating lease right-of-use assets	22,008	23,541
Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	3,398,594	3,184,246
Operating Segments | Home Building Segment | Mid Atlantic
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	1,303,144	1,252,360
Operating Segments | Home Building Segment | North East
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	359,845	314,904
Operating Segments | Home Building Segment | Mid East
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	384,693	368,154
Operating Segments | Home Building Segment | South East
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	889,083	796,505
Operating Segments | Mortgage Banking
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	461,829	452,323
Segment Reconciling Items
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	3,139,563	3,417,511
Deferred taxes	149,958	148,005
Intangible assets and goodwill	49,368	49,368
Finance Lease, Right-of-Use Asset	14,594	13,310
Contract land deposit reserve	(45,932)	(53,397)
Consolidation adjustments and other	$ 63,505	$ 63,369