Commitments and Contingencies - Schedule of Contractual Obligations (Footnotes) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Jan. 12, 2024	Dec. 31, 2023	Mar. 10, 2022	Mar. 16, 2020	Feb. 26, 2020	Nov. 28, 2018	Nov. 06, 2018
Debt Instrument
Loans held for sale, at fair value	$ 774,905,000		$ 528,944,000
Total remaining draws on construction loans committed to fund	2,327,074,000
Debt	670,673,000		547,260,000
Line of Credit | Revolving Credit Facility
Debt Instrument
Maximum revolving credit				$ 600,000,000	$ 465,000,000.0	$ 425,000,000.0	$ 250,000,000.0
Debt	75,000,000		0
Warehouse Facility
Debt Instrument
Maximum revolving credit	$ 3,100,000,000
7.500% Senior Notes
Debt Instrument
Debt instrument, variable interest rate, type flag	SOFR
Basis spread on variable rate	1.60%
7.500% Senior Notes | Senior Notes
Debt Instrument
Stated interest rate	7.50%	7.50%
Debt	$ 595,673,000		$ 0
Debt instrument face amount		$ 600,000,000						$ 675,000,000
Interest on warehouse facility
Debt Instrument
Total remaining draws on construction loans committed to fund	$ 2,297,000
Debt instrument, variable interest rate, type flag	SOFR
Basis spread on variable rate	1.30%
Fannie Mae repurchase agreement, open maturity
Debt Instrument
Basis spread on variable rate	1.15%
Long-term debt
Debt Instrument
Total remaining draws on construction loans committed to fund	$ 675,000,000
Long-term debt | 7.500% Senior Notes | Senior Notes
Debt Instrument
Maximum revolving credit	$ 600,000,000