RESIDENTIAL MORTGAGE LOANS - Schedule of Net Interest Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Interest income:
Loans HFI, at fair value	$ 7,579	$ 9,214	$ 15,436	$ 18,723
Total interest income	54,502	52,843	99,236	101,142
Interest expense:
Loans HFI, at fair value	4,032	4,849	8,256	9,519
Total interest expense	57,367	48,618	99,545	96,911
Net interest income	(2,865)	4,225	(309)	4,231
Loans HFS, at lower of cost or fair value
Interest income:
Loans HFS	1,279	1,884	2,140	3,388
Interest expense:
Loans HFS	1,007	982	1,723	1,889
Loans HFS, at fair value
Interest income:
Loans HFS	45,644	41,745	81,660	79,031
Interest expense:
Loans HFS	$ 52,328	$ 42,787	$ 89,566	$ 85,503