Segment Information, Nature of Operations, and Certain Concentrations - Profit before Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit before taxes	$ 1,761,932	$ 2,115,506	$ 1,928,373
Equity-based compensation expense	(69,213)	(73,925)	(99,507)
Home Building
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit before taxes	1,609,883	1,960,571	1,795,580
Mortgage Banking
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit before taxes	152,049	154,935	132,793
Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit before taxes	1,561,307	1,871,673	1,751,051
Operating Segments \| Home Building \| Mid Atlantic
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit before taxes	722,599	816,255	745,323
Operating Segments \| Home Building \| North East
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit before taxes	213,546	217,225	169,012
Operating Segments \| Home Building \| Mid East
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit before taxes	266,990	290,834	257,865
Operating Segments \| Home Building \| South East
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit before taxes	202,011	388,158	440,538
Operating Segments \| Mortgage Banking
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit before taxes	156,161	159,201	138,313
Corporate And Reconciling Items
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Profit before taxes	200,625	243,833	177,322
Contract land deposit reserve adjustment	(72,276)	6,228	3,279
Equity-based compensation expense	(69,213)	(73,925)	(99,507)
Corporate capital allocation charge	368,698	330,897	288,805
Unallocated Corporate Overhead	(146,123)	(156,470)	(175,208)
Consolidation Adjustments And Other	62,872	26,424	44,619
Corporate interest income	84,158	137,530	142,083
Corporate interest expense	$ (27,491)	$ (26,851)	$ (26,749)

Consolidation adjustments and other.

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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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Corporate interest income

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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

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
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-Section S99
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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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-Name Accounting Standards Codification
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