Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022	Dec. 31, 2021
Loss Contingencies [Line Items]
Letters of credit outstanding	$ 304,600		$ 304,600			$ 303,400
Surety bonds outstanding	$ 2,300,000		$ 2,300,000			2,200,000
Comprehensive warranty against building defects	1 year		1 year
Maximum product warranty in years			10 years
Self-insurance liabilities	$ 622,981	$ 679,293	$ 622,981	$ 679,293	$ 605,192	$ 635,857	$ 652,686	$ 627,067
Incurred but not reported percentage of liability reserves						74.00%
ROU assets	69,900		69,900			$ 73,500
Operating lease liabilities	84,799		84,799			90,100
Additional ROU assets under operating leases	1,300	3,300	9,600	7,500
Payments on lease liabilities	6,100	5,000	17,400	16,100
Total lease expense	13,500	14,300	42,000	40,500
Variable lease costs	2,700	3,300	8,900	7,700
Short-term lease costs	4,000	$ 5,200	12,800	$ 15,800
Other Assets
Loss Contingencies [Line Items]
Recorded insurance receivables	$ 39,700		$ 39,700			$ 43,700