Fair Value - Fair Value Measurement (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assumed Gain From Loan Sale	$ 6,704
Interest Rate Movement Effect	34,069
Servicing Rights Value	26,558
Security Price Change	(18,297)
Total Fair Value Measurement Gain/(Loss)	49,034	$ (7,435)
Senior Notes Due Two Thousand Thirty [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior notes	913,027	914,888
Level 2 | Fair Value, Measurements, Recurring | Senior Notes Due Two Thousand Thirty [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior Notes fair value	803,646	788,166
Home Building
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior notes	913,027	914,888
Mortgage Banking | Level 2 | Fair Value, Measurements, Recurring | Rate lock commitments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assumed Gain From Loan Sale	5,839
Interest Rate Movement Effect	31,548
Servicing Rights Value	23,595
Security Price Change	0
Total Fair Value Measurement Gain/(Loss)	60,982
Derivative, Notional Amount	2,110,217
Mortgage Banking | Level 2 | Fair Value, Measurements, Recurring | Forward sales contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assumed Gain From Loan Sale	0
Interest Rate Movement Effect	0
Servicing Rights Value	0
Security Price Change	(18,297)
Total Fair Value Measurement Gain/(Loss)	(18,297)
Derivative, Notional Amount	1,856,541
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]
Assumed Gain From Loan Sale	865
Interest Rate Movement Effect	2,521
Servicing Rights Value	2,963
Security Price Change	0
Total Fair Value Measurement Gain/(Loss)	6,349	(2,675)
Derivative, Notional Amount	$ 216,211	$ 319,481