RESIDENTIAL MORTGAGE LOANS - Schedule of Net Interest Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Interest income:
Loans HFI, at fair value	$ 7,857	$ 9,509
Total interest income	44,734	48,299
Interest expense:
Loans HFI, at fair value	4,224	4,670
Total interest expense	42,178	48,356
Net interest income	2,556	(57)
Loans HFS, at lower of cost or fair value
Interest income:
Loans HFS	861	1,504
Interest expense:
Loans HFS	716	907
Loans HFS, at fair value
Interest income:
Loans HFS	36,016	37,286
Interest expense:
Loans HFS	$ 37,238	$ 42,779