Debt - Schedule of Warehouse Lines of Credit (Details) - Line of Credit - Mortgages Segment - USD ($)	Sep. 30, 2020	Sep. 25, 2020
Debt Instrument [Line Items]
Maximum Borrowing Capacity	$ 150,000,000
Citibank, N.A.
Debt Instrument [Line Items]
Maximum Borrowing Capacity	$ 75,000,000
Weighted Average Interest Rate	1.65%
Comerica Bank
Debt Instrument [Line Items]
Maximum Borrowing Capacity	$ 75,000,000	$ 75,000,000.0
Weighted Average Interest Rate	1.01%