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Fair Value - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total fair value measurement gain/(loss) $ 44,863   $ 49,034
Home Building Segment      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Senior Notes carrying value 912,554   913,027
Home Building Segment | Senior Notes Due Two Thousand Thirty      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Senior Notes carrying value 912,554   913,027
Home Building Segment | Level 2 | Fair Value, Recurring | Senior Notes Due Two Thousand Thirty      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Senior Notes fair value 795,510   803,646
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) 4,171 $ 42,188  
Mortgage Banking | Level 2 | Fair Value, Recurring | Rate Lock Commitments      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair value disclosure, off-balance sheet risks, face amount, liability 2,098,953    
Total fair value measurement gain/(loss) 38,211    
Mortgage Banking | Level 2 | Fair Value, Recurring | Forward Sales Contracts      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair value disclosure, off-balance sheet risks, face amount, liability 2,045,587    
Total fair value measurement gain/(loss) (3,088)    
Mortgage Banking | Level 2 | Fair Value, Recurring | Mortgages Held for Sale      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Trade and loans receivables held-for-sale, net, not part of disposal group 332,510   222,560
Fair Value, principal amount, loans held for sale 322,770   216,211
Fair value, option, changes in fair value, gain (loss) $ 9,740   $ 6,349