Commitments and Contingencies - Narrative (Details)	12 Months Ended
	Dec. 31, 1987 lease	Sep. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)
Commitment And Contingencies [Line Items]
Legal reserves		$ 0	$ 0
Outstanding warranty insurance receivables		66,007,000	66,014,000
Estimated remaining liabilities related to surety bonds		$ 8,326,000	12,431,000
Office Leases
Commitment And Contingencies [Line Items]
Lease obligation original term (in years)		10 years
Equipment Leases | Minimum
Commitment And Contingencies [Line Items]
Lease obligation original term (in years)		3 years
Equipment Leases | Maximum
Commitment And Contingencies [Line Items]
Lease obligation original term (in years)		4 years
Ground leases
Commitment And Contingencies [Line Items]
Lease obligation original term (in years)	55 years
Number of properties subject to ground leases | lease	2
Ground leases | Ten Year Renewal Option
Commitment And Contingencies [Line Items]
Number of lease renewal options | lease	3
Term of lease extension (in years)	10 years
Ground leases | Forty-five Year Renewal Option
Commitment And Contingencies [Line Items]
Lease obligation original term (in years)	45 years
Number of properties subject to ground leases | lease	1
Ground leases | Extension Through 2071
Commitment And Contingencies [Line Items]
Number of ground leases extended | lease	1
Surety Bonds
Commitment And Contingencies [Line Items]
Outstanding surety bonds		$ 755,400,000	697,200,000
Estimated remaining liabilities related to surety bonds		$ 433,800,000	$ 435,900,000