v3.26.3
Debt (Narrative) (Details) - USD ($)
 1 Months Ended 9 Months Ended
Feb. 28, 2026
Sep. 30, 2026
Sep. 30, 2025
Jan. 31, 2026
Dec. 31, 2025
Debt Instrument [Line Items]          
Other notes payable   $ 25,392,000     $ 47,185,000
Revolving credit facility   0      
Letters of credit outstanding   368,300,000     357,100,000
Line of credit facility, remaining borrowing capacity   1,400,000,000     892,900,000
Financial Services debt   383,245,000     532,338,000
Joint Venture Debt | Joint Venture          
Debt Instrument [Line Items]          
Joint venture debt outstanding   64,600,000      
Notes Payables          
Debt Instrument [Line Items]          
Other notes payable   $ 25,400,000     47,200,000
Debt instrument term   4 years      
Notes payable issued to acquire land inventory   $ 34,200,000 $ 13,100,000    
Senior Notes          
Debt Instrument [Line Items]          
Face amount $ 800,000,000.0        
Senior Notes | 5.500% unsecured senior notes due March 2026          
Debt Instrument [Line Items]          
Face amount   $ 0     251,867,000
Stated interest rate   5.50%      
Repayments of senior debt 251,900,000        
Senior Notes | 4.250% Unsecured Senior Notes Due March 2031          
Debt Instrument [Line Items]          
Face amount 400,000,000.0 $ 400,000,000     0
Stated interest rate   4.25%      
Senior Notes | 4.900% Unsecured Senior Notes Due March 2036          
Debt Instrument [Line Items]          
Face amount 400,000,000.0 $ 400,000,000     0
Stated interest rate   4.90%      
Senior Notes | 5.000% unsecured senior notes due January 2027          
Debt Instrument [Line Items]          
Face amount   $ 0     337,277,000
Stated interest rate   5.00%      
Early repayment of senior debt 337,300,000        
Line of Credit | Revolving Credit Facility          
Debt Instrument [Line Items]          
Maximum borrowing capacity 1,750,000,000     $ 1,250,000,000  
Line of credit facility, potential maximum borrowing capacity 2,500,000,000        
Accordion feature $ 750,000,000.0     $ 500,000,000.0  
Financial Services          
Debt Instrument [Line Items]          
Line of credit facility, remaining borrowing capacity   $ 241,800,000     $ 92,700,000
Weighted-average interest rate   5.61%     5.51%
Financial Services | Line of Credit          
Debt Instrument [Line Items]          
Maximum borrowing capacity   $ 625,000,000.0      
Revolving Credit Facility          
Debt Instrument [Line Items]          
Revolving credit facility         $ 0
Line of Credit | Financial Services          
Debt Instrument [Line Items]          
Financial Services debt   $ 383,200,000     $ 532,300,000
Maximum | Notes Payables          
Debt Instrument [Line Items]          
Stated interest rate   9.00%