REAL ESTATE AND OTHER SECURITIES - Schedule of RMBS Designated as AFS in an Unrealized Loss Position - Associated Intent to Sell (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Securities intended to sell
Debt Securities, Available-for-sale [Line Items]
Fair Value	$ 0	$ 0
Amortized Cost Basis After Credit Impairment	0	0
Gross Unrealized Losses, Credit	0	0
Gross Unrealized Losses, Non-Credit	0	0
Securities that are more likely than not required to be sold
Debt Securities, Available-for-sale [Line Items]
Fair Value	0	0
Amortized Cost Basis After Credit Impairment	0	0
Gross Unrealized Losses, Credit	0	0
Gross Unrealized Losses, Non-Credit	0	0
Credit impaired securities
Debt Securities, Available-for-sale [Line Items]
Fair Value	64,525	65,697
Amortized Cost Basis After Credit Impairment	64,591	66,377
Gross Unrealized Losses, Credit	(10,684)	(10,152)
Gross Unrealized Losses, Non-Credit	(66)	(680)
Non-credit impaired securities
Debt Securities, Available-for-sale [Line Items]
Fair Value	232,187	236,719
Amortized Cost Basis After Credit Impairment	257,244	260,527
Gross Unrealized Losses, Credit	0	0
Gross Unrealized Losses, Non-Credit	(25,057)	(23,808)
Total debt securities in an unrealized loss position
Debt Securities, Available-for-sale [Line Items]
Fair Value	296,712	302,416
Amortized Cost Basis After Credit Impairment	321,835	326,904
Gross Unrealized Losses, Credit	(10,684)	(10,152)
Gross Unrealized Losses, Non-Credit	$ (25,123)	$ (24,488)