Segment Disclosures - Income before Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income before taxes	$ 447,133	$ 533,568	$ 849,137	$ 1,004,260
Equity-based compensation expense			(36,339)	(35,242)
Home Building Segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income before taxes	417,517	488,536	787,001	930,214
Mortgage Banking
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income before taxes	29,616	45,032	62,136	74,046
Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income before taxes	393,426	467,802	768,415	892,085
Operating Segments \| Home Building Segment \| Mid Atlantic
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income before taxes	191,390	209,166	378,223	399,130
Operating Segments \| Home Building Segment \| North East
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income before taxes	57,964	54,372	113,075	101,229
Operating Segments \| Home Building Segment \| Mid East
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income before taxes	61,729	63,588	115,338	129,989
Operating Segments \| Home Building Segment \| South East
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income before taxes	51,518	94,442	97,248	185,847
Operating Segments \| Mortgage Banking
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income before taxes	30,825	46,234	64,531	75,890
Corporate and Reconciling Items
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income before taxes	53,707	65,766	80,722	112,175
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Contract land deposit reserve adjustment	(13,153)	1,325	(21,270)	8,791
Equity-based compensation expense	(17,813)	(18,101)	(36,339)	(35,242)
Corporate capital allocation	(91,898)	(82,494)	(179,525)	(159,555)
Unallocated corporate overhead	(34,364)	(33,816)	(90,333)	(85,520)
Consolidation adjustments and other	13,538	6,363	17,470	4,092
Segment Reporting, Reconciling Item, Corporate Nonsegment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Corporate Interest Expense	(6,675)	(6,670)	(13,806)	(13,265)
Interest income	$ 20,276	$ 34,171	$ 45,475	$ 73,764

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Contract land deposit reserve adjustment.

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The corporate capital allocation charge is eliminated in consolidation and is based on the segment’s average net assets employed.

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Corporate Interest Expense

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Unallocated corporate overhead.

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- Definition

The portion of earnings or loss from continuing operations before income taxes that is attributable to domestic operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

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-Topic 740
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-Topic 235
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of noncash expense for share-based payment arrangement.

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