Debt - Mortgages Segment, Schedule of Warehouse Lines of Credit (Details) - USD ($)	Dec. 31, 2021	Sep. 17, 2021	Sep. 16, 2021	Aug. 24, 2021	Aug. 23, 2021	Jun. 26, 2021	Mar. 19, 2021	Feb. 04, 2021
Credit Suisse AG, Cayman Islands
Debt Instrument [Line Items]
Maximum Borrowing Capacity		$ 1,500,000,000	$ 500,000,000
Citibank, N.A.
Debt Instrument [Line Items]
Maximum Borrowing Capacity				$ 1,000,000,000	$ 500,000,000
Line of Credit | Mortgages
Debt Instrument [Line Items]
Maximum Borrowing Capacity	$ 460,000,000
Line of Credit | Credit Suisse AG, Cayman Islands | Mortgages
Debt Instrument [Line Items]
Maximum Borrowing Capacity	$ 300,000,000						$ 300,000,000
Weighted Average Interest Rate	2.50%
Line of Credit | Citibank, N.A. | Mortgages
Debt Instrument [Line Items]
Maximum Borrowing Capacity	$ 100,000,000
Weighted Average Interest Rate	1.85%
Line of Credit | Comerica Bank | Mortgages
Debt Instrument [Line Items]
Maximum Borrowing Capacity	$ 60,000,000					$ 60,000,000		$ 100,000,000
Weighted Average Interest Rate	2.50%