Capital and Liquidity Requirements (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Percentage of Freddie Mac's liquidity requirement of outstanding principal of TAH loans serviced	8.00%
Other Assets
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Outstanding borrower advances	$ 0.2	$ 0.3
Seller/Servicer Agreements
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Amount of capital in excess of aggregate regulatory requirements	$ 282.6