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Segment Disclosures - Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 5,726,213	$ 5,834,475
Finance Lease, Right-of-Use Asset	14,386	14,578
Contract land deposit reserve	(24,115)	(30,041)
Home Building Segment
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	5,312,323	5,455,443
Cash and cash equivalents	2,138,706	2,545,069
Operating lease right-of-use assets	59,819	59,010
Mortgage Banking
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	413,890	379,032
Cash and cash equivalents	19,157	28,398
Operating lease right-of-use assets	8,491	9,758
Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	3,233,240	2,997,449
Operating Segments | Home Building Segment | Mid Atlantic
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	1,355,052	1,322,818
Operating Segments | Home Building Segment | North East
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	286,796	235,048
Operating Segments | Home Building Segment | Mid East
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	478,605	438,700
Operating Segments | Home Building Segment | South East
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	706,244	629,198
Operating Segments | Mortgage Banking
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	406,543	371,685
Corporate and Reconciling Items
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	2,492,973	2,837,026
Cash and cash equivalents	2,138,706	2,545,069
Deferred taxes	135,136	132,894
Intangible assets and goodwill	49,368	49,368
Operating lease right-of-use assets	59,819	59,010
Finance Lease, Right-of-Use Asset	14,386	14,578
Contract land deposit reserve	(24,115)	(30,041)
Consolidation adjustments and other	$ 119,673	$ 66,148

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