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Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Significant Accounting Policies [Line Items] |  |  |
Loss reserve on contract land deposits | $ 53,397 | $ 57,060 |
Net Contract Land Deposit Impairment Recoveries | $ 2,900 | (27,500) | $ 22,100
Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration] | Accrued Liabilities [Member] |  |
Office facilities and other | Minimum |  |  |
Significant Accounting Policies [Line Items] |  |  |
Property, Plant and Equipment, Useful Life | 3 years |  |
Office facilities and other | Maximum |  |  |
Significant Accounting Policies [Line Items] |  |  |
Property, Plant and Equipment, Useful Life | 10 years |  |
Manufacturing Facilities | Minimum |  |  |
Significant Accounting Policies [Line Items] |  |  |
Property, Plant and Equipment, Useful Life | 5 years |  |
Manufacturing Facilities | Maximum |  |  |
Significant Accounting Policies [Line Items] |  |  |
Property, Plant and Equipment, Useful Life | 40 years |  |
Home Building |  |  |
Significant Accounting Policies [Line Items] |  |  |
Cash | $ 3,126,472 | 2,503,424 |
Goodwill acquired from business acquisition | 41,580 | 41,580 |
Contract with Customer, Liability | 334,441 | 313,804 |
Mortgage Banking |  |  |
Significant Accounting Policies [Line Items] |  |  |
Cash | 36,422 | 19,415 |
Goodwill acquired from business acquisition | $ 7,347 | 7,347 |
Mortgage Banking | Level 2 | Fair Value, Measurements, Recurring |  |  |
Significant Accounting Policies [Line Items] |  |  |
Typical length of days loans sold into secondary market | 30 days |  |
Mortgage Banking | Level 2 | Fair Value, Measurements, Recurring | Rate lock commitments |  |  |
Significant Accounting Policies [Line Items] |  |  |
Derivative, Notional Amount | $ 2,110,217 |  |
Mortgage Banking | Level 2 | Fair Value, Measurements, Recurring | Forward sales contracts |  |  |
Significant Accounting Policies [Line Items] |  |  |
Derivative, Notional Amount | 1,856,541 |  |
Other Assets |  |  |
Significant Accounting Policies [Line Items] |  |  |
Capitalized Contract Cost, Net | $ 17,900 | $ 15,300 |

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