Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Significant Accounting Policies [Line Items]
Loss reserve on contract land deposits	$ 30,041	$ 52,205
Net Contract Land Deposit Impairment Recoveries	$ 22,100	(25,600)	$ 700
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	$ 2,545,069	2,714,720
Goodwill acquired from business acquisition	41,580	41,580
Contract with Customer, Liability	417,463	240,758
Mortgage Banking
Significant Accounting Policies [Line Items]
Cash	28,398	63,547
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	$ 1,028,451
Mortgage Banking | Level 2 | Fair Value, Measurements, Recurring | Forward sales contracts
Significant Accounting Policies [Line Items]
Derivative, Notional Amount	1,184,999
Consolidated Joint Venture
Significant Accounting Policies [Line Items]
Cash	268	269
Other Assets
Significant Accounting Policies [Line Items]
Capitalized Contract Cost, Net	$ 25,200	$ 22,500