Commitments and Contingencies - Schedule of Contractual Obligations (Footnotes) (Details) - USD ($)			12 Months Ended
	Mar. 10, 2022	Nov. 30, 2018	Dec. 31, 2023	Jan. 12, 2024	Dec. 20, 2023	Aug. 10, 2023	Dec. 31, 2022	Mar. 16, 2020	Feb. 26, 2020	Nov. 28, 2018	Nov. 06, 2018
Debt Instrument
Loans held for sale, at fair value			$ 528,944,000				$ 138,345,000
Long-term debt			547,260,000				547,784,000
Debt			547,260,000				0
Line of Credit | Revolving Credit Facility
Debt Instrument
Long-term debt			$ 380,000,000
Maximum revolving credit	$ 600,000,000							$ 465,000,000	$ 425,000,000	$ 250,000,000
Line of Credit | Revolving Credit Facility | SOFR
Debt Instrument
Basis spread on variable rate	1.50%		1.50%
Warehouse Facility
Debt Instrument
Maximum revolving credit			$ 3,000,000,000
6.125% Senior Notes | Senior Notes
Debt Instrument
Debt instrument face amount											$ 550,000,000
Principal balance			0				550,000,000
Long-term debt			$ 0				547,784,000
Stated interest rate			6.125%								6.125%
Delayed Draw Term Loan | Line of Credit | Revolving Credit Facility
Debt Instrument
Principal balance			$ 420,000,000				0
Long-term debt			417,260,000				0
Debt			417,260,000				0
Maximum revolving credit						$ 550,000,000
Cantor Credit Agreement | Line of Credit | Revolving Credit Facility
Debt Instrument
Long-term debt			130,000,000		$ 130,000,000		0
Debt			$ 130,000,000				$ 0
Basis spread on variable rate		1.00%
Maximum revolving credit		$ 250,000,000			$ 150,000,000
7.500% Senior Notes Due January 12, 2029 | Senior Notes | Subsequent Event
Debt Instrument
Debt instrument face amount				$ 600,000,000
Stated interest rate				7.50%
Interest on warehouse facility | SOFR
Debt Instrument
Basis spread on variable rate			1.30%
Fannie Mae repurchase agreement, open maturity | SOFR
Debt Instrument
Basis spread on variable rate			1.15%