Fair Value - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fair value measurement gain/(loss)	$ (7,435)	$ 18,237
Senior Notes due 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior Notes	0	599,553
Level 2 | Fair Value, Measurements, Recurring | Senior Notes due 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior Notes fair value	0	610,452
Home Building
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior Notes	914,888	1,516,255
Mortgage Banking
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financing Receivable, Held-for-Sale, Not Part of Disposal Group, after Valuation Allowance	316,806	302,192
Financing Receivable, Held-for-Sale, Not Part of Disposal Group, after Valuation Allowance	316,806	302,192
Mortgage Banking | Level 2 | Not Designated as Hedging Instrument
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value adjustment income (expense)	25,673	(2,654)	$ 1,472
Mortgage Banking | Level 2 | Fair Value, Measurements, Recurring | Rate lock commitments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fair value measurement gain/(loss)	11,300
Derivative, Notional Amount	1,607,055
Derivative, Notional Amount	1,607,055
Mortgage Banking | Level 2 | Fair Value, Measurements, Recurring | Forward sales contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fair value measurement gain/(loss)	(16,060)
Derivative, Notional Amount	1,752,852
Derivative, Notional Amount	1,752,852
Mortgage Banking | Level 2 | Fair Value, Measurements, Recurring | Mortgages held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fair value measurement gain/(loss)	(2,675)	4,296
Derivative, Notional Amount	319,481	297,896
Financing Receivable, Held-for-Sale, Not Part of Disposal Group, after Valuation Allowance	316,806	302,192
Financing Receivable, Held-for-Sale, Not Part of Disposal Group, after Valuation Allowance	316,806	302,192
Derivative, Notional Amount	$ 319,481	$ 297,896