Real Estate Securities - Schedule of Carrying Value of AFS Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Principal balance	$ 149,956	$ 221,933
Credit reserve	(23,436)	(28,739)
Unamortized discount, net	(46,885)	(61,650)
Amortized cost	79,635	131,544
Gross unrealized gains	16,973	16,269
Gross unrealized losses	(6,753)	(13,127)
CECL allowance	(2,482)	(2,540)	$ 0
Carrying Value	$ 87,373	$ 132,146