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Fair Value - Fair Value Measurement (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assumed Gain From Loan Sale $ 2,375  
Interest Rate Movement Effect (19,517)  
Servicing Rights Value 25,767  
Security Price Change (16,060)  
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
Senior Notes Due Two Thousand Thirty [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Senior notes 914,888 916,702
Senior Notes    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Senior notes 914,888 1,516,255
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
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 788,166 942,192
Level 2 | Fair Value, Measurements, Recurring | Senior Notes    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Senior Notes fair value 788,166 1,552,644
Home Building    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Senior notes 914,888 1,516,255
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 2,213  
Interest Rate Movement Effect (12,034)  
Servicing Rights Value 21,121  
Security Price Change 0  
Total Fair Value Measurement Gain/(Loss) 11,300  
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]    
Assumed Gain From Loan Sale 0  
Interest Rate Movement Effect 0  
Servicing Rights Value 0  
Security Price Change (16,060)  
Total Fair Value Measurement Gain/(Loss) (16,060)  
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]    
Assumed Gain From Loan Sale 162  
Interest Rate Movement Effect (7,483)  
Servicing Rights Value 4,646  
Security Price Change 0  
Total Fair Value Measurement Gain/(Loss) (2,675) 4,296
Derivative, Notional Amount $ 319,481 $ 297,896