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Commitments and Contingencies (Narrative) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Jun. 30, 2024
Dec. 31, 2023
Jun. 30, 2023
Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]                
Letters of credit outstanding $ 310,900   $ 310,900     $ 312,700    
Surety bonds outstanding $ 2,800,000   $ 2,800,000     2,400,000    
Comprehensive warranty against building defects 1 year   1 year          
Maximum product warranty in years     10 years          
Self-insurance liabilities $ 517,655 $ 622,981 $ 517,655 $ 622,981 $ 506,523 $ 563,103 $ 605,192 $ 635,857
Incurred but not reported percentage of liability reserves 76.00%   76.00%     77.00%    
ROU assets $ 72,700   $ 72,700     $ 77,400    
Operating lease liabilities 85,471   85,471     $ 91,600    
Additional ROU assets under operating leases 3,600 1,300 9,100 9,600        
Payments on lease liabilities 5,900 6,100 17,600 17,400        
Total lease expense 15,300 13,500 45,500 42,000        
Variable lease costs 2,300 2,700 8,400 8,900        
Short-term lease costs $ 6,200 $ 4,000 $ 17,000 $ 12,800