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Commitments and Contingencies (Narrative) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]        
Letters of credit outstanding $ 298,600   $ 312,700  
Surety bonds outstanding $ 2,600,000   2,400,000  
Comprehensive warranty against building defects 1 year      
Maximum product warranty in years 10 years      
Self-insurance liabilities $ 547,621 $ 652,745 $ 563,103 $ 635,857
Incurred but not reported percentage of liability reserves 77.00%   77.00%  
ROU assets $ 76,500   $ 77,400  
Operating lease liabilities 90,292   $ 91,600  
Additional ROU assets under operating leases 3,700 3,900    
Payments on lease liabilities 5,900 5,400    
Total lease expense 15,000 14,200    
Variable lease costs 3,600 3,000    
Short-term lease costs $ 4,800 $ 4,200