Real Estate Assets, Net - Narrative (Details) $ in Thousands	3 Months Ended			12 Months Ended
	Mar. 31, 2020 USD ($) property		Mar. 31, 2019 USD ($) property	Dec. 31, 2019 USD ($) property		Dec. 31, 2018 USD ($)
Real Estate [Line Items]
Number of properties owned | property	9			10
Aggregate carrying value REO properties | $	$ 1,300			$ 1,500
Number of REO properties held for rental | property	5			6
Number of properties acquired through foreclosure | property	1			1
Number of properties transferred from property held for sale | property	6			6
Property held-for-sale, net | $	$ 10,905	[1]	$ 18,580	$ 13,537	[1]	$ 19,402
Real Estate Held For Sale Improvements | $	$ 700			$ 2,200
Number of held-for-sale residential properties disposed | property	19		33
Gain (loss) on sale of property | $	$ 286		$ 103
Real Estate Impairment | $	900		500
Number of real estate properties purchased | property				2
Other Income
Real Estate [Line Items]
Gain (loss) on sale of property | $	$ 400		$ 100

[1] Property held-for-sale, net, includes valuation allowances of $2.3 million and $1.8 million at March 31, 2020 and December 31, 2019, respectively.