Investments in Equity Affiliates (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Investments in and Advances to Affiliates [Line Items]
Investment in Equity Affiliates	$ 79,303	$ 79,130
UPB of Loans to Equity Affiliates	1,688
Arbor Residential Investor LLC
Investments in and Advances to Affiliates [Line Items]
Investment in Equity Affiliates	32,743	46,951
UPB of Loans to Equity Affiliates	0
AMAC Holdings III LLC
Investments in and Advances to Affiliates [Line Items]
Investment in Equity Affiliates	13,591	15,825
UPB of Loans to Equity Affiliates	0
Fifth Wall Ventures
Investments in and Advances to Affiliates [Line Items]
Investment in Equity Affiliates	13,365	13,584
UPB of Loans to Equity Affiliates	0
AWC Real Estate Opportunity Partners I LP
Investments in and Advances to Affiliates [Line Items]
Investment in Equity Affiliates	11,671	0
UPB of Loans to Equity Affiliates	0
ARSR DPREF I LLC
Investments in and Advances to Affiliates [Line Items]
Investment in Equity Affiliates	5,163	0
UPB of Loans to Equity Affiliates	0
Lightstone Value Plus REIT L.P.
Investments in and Advances to Affiliates [Line Items]
Investment in Equity Affiliates	1,895	1,895
UPB of Loans to Equity Affiliates	0
Docsumo Pte. Ltd.
Investments in and Advances to Affiliates [Line Items]
Investment in Equity Affiliates	450	450
UPB of Loans to Equity Affiliates	0
JT Prime
Investments in and Advances to Affiliates [Line Items]
Investment in Equity Affiliates	425	425
UPB of Loans to Equity Affiliates	0
West Shore Café
Investments in and Advances to Affiliates [Line Items]
Investment in Equity Affiliates	0	0
UPB of Loans to Equity Affiliates	1,688
Lexford Portfolio
Investments in and Advances to Affiliates [Line Items]
Investment in Equity Affiliates	0	0
UPB of Loans to Equity Affiliates	0
East River Portfolio
Investments in and Advances to Affiliates [Line Items]
Investment in Equity Affiliates	0	$ 0
UPB of Loans to Equity Affiliates	$ 0