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Distressed and Other Residential Mortgage Loans, Net - Delinquencies in Portfolio of Loans Held in Securitization Trusts (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) loan	Dec. 31, 2018 USD ($) loan
90
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of Delinquent Loans	16
Total Unpaid Principal | $	$ 10,010
% of Loan Portfolio	21.05%
Residential Mortgage Loans Held In Securitization Trusts And Real Estate Owned Held In Residential Securitization
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of Delinquent Loans	18
Number Of Delinquent Loans, Real estate through foreclosure	1
Unpaid Principal, Real estate owned through foreclosure | $	$ 360
% Of Loan Portfolio, Real estate owned through foreclosure	0.76%
Residential Mortgage Loans Held In Securitization Trusts And Real Estate Owned Held In Residential Securitization | 30 - 60
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of Delinquent Loans	2
Total Unpaid Principal | $	$ 211
% of Loan Portfolio	0.44%
Residential mortgage loans held in securitization trust, at fair value
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of Delinquent Loans		19
Residential mortgage loans held in securitization trust, at fair value | 90
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of Delinquent Loans		19
Total Unpaid Principal | $		$ 10,926
% of Loan Portfolio		18.16%

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Financing Receivable, Recorded Investment Past Due, Real Estate Owned Through Foreclosure.

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The aggregate number of delinquent loans.

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Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 55
-Paragraph 80
-URI http://asc.fasb.org/extlink&oid=118955255&loc=SL82922355-210448

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-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919253-210447

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-Publisher FASB
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