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Real Estate Securities - Available for Sale Securities by Collateral Type (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Debt and Equity Securities, FV-NI [Line Items]
Available-for-sale	$ 144,777		$ 144,777		$ 87,373
Fair value of securities acquired	33,386	$ 1,979	47,442	$ 1,979
Fair value of securities sold	0	40,574	0	43,252
Net unrealized gains (losses) on AFS securities	1,054	$ (688)	9,710	$ 4,319
Total Senior
Debt and Equity Securities, FV-NI [Line Items]
Available-for-sale	20,992		20,992		0
Other third-party securities
Debt and Equity Securities, FV-NI [Line Items]
Available-for-sale	20,992		20,992		0
Mezzanine
Debt and Equity Securities, FV-NI [Line Items]
Available-for-sale	13,318		13,318		0
Multifamily securities
Debt and Equity Securities, FV-NI [Line Items]
Available-for-sale	2,834		2,834		0
Other third-party securities
Debt and Equity Securities, FV-NI [Line Items]
Available-for-sale	10,484		10,484		0
Total Subordinate
Debt and Equity Securities, FV-NI [Line Items]
Available-for-sale	110,467		110,467		87,373
Sequoia securities
Debt and Equity Securities, FV-NI [Line Items]
Available-for-sale	88,165		88,165		78,942
Multifamily securities
Debt and Equity Securities, FV-NI [Line Items]
Available-for-sale	8,869		8,869		4,460
Other third-party securities
Debt and Equity Securities, FV-NI [Line Items]
Available-for-sale	$ 13,433		$ 13,433		$ 3,971

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