SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2025 USD ($) lot	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) lot	Sep. 30, 2024 USD ($)	Dec. 31, 2024 USD ($) lot segment
Significant Accounting Policies [Line Items]
Inventory impairments		$ 0	$ 28,821,000	$ 2,325,000
Land held for sale write-down	$ 0		$ 0	6,782,000
Assets held for sale					$ 89,700,000
Total controlled lots | lot	50,568		50,568		49,435
Purchase price	$ 1,500,000,000		$ 1,500,000,000		$ 1,200,000,000
Land deposits	198,300,000		198,300,000		$ 154,800,000
Total revenue	2,095,751,000	2,120,842,000	6,021,840,000	5,811,647,000
Amenity and other revenue
Significant Accounting Policies [Line Items]
Total revenue	33,191,000	$ 14,234,000	$ 54,308,000	$ 32,323,000
Amenity and other revenue | Urban Form
Significant Accounting Policies [Line Items]
Total revenue	$ 22,800,000
Land banking arrangements
Significant Accounting Policies [Line Items]
Total controlled lots | lot	7,939		7,939		6,895
Build-to-Rent Land Banking Agreement
Significant Accounting Policies [Line Items]
Total controlled lots | lot	3,562		3,562
Purchase price	$ 769,600,000		$ 769,600,000
Land deposits	34,100,000		34,100,000
East
Significant Accounting Policies [Line Items]
Inventory impairments	7,200,000		28,800,000
West
Significant Accounting Policies [Line Items]
Carrying amount for build to rent asset	$ 43,900,000		$ 43,900,000
Build to rent asset | segment					1
Minimum
Significant Accounting Policies [Line Items]
Life cycle of communities (in years)			2 years
Maximum
Significant Accounting Policies [Line Items]
Life cycle of communities (in years)			5 years