RESIDENTIAL MORTGAGE LOANS - Residential Mortgage Loans Outstanding by Loan Type, Excluding REO (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($) loan	Dec. 31, 2023 USD ($)
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Weighted Average Life (Years)	3 years 7 months 6 days
Consolidated Investments
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Face Amount	$ 2,966,605
Carrying Value	$ 2,791,027	$ 3,038,587
Loan Count | loan	7,996
Weighted Average Yield	5.80%
Weighted Average Life (Years)	25 years 9 months 18 days
Residential mortgage loans, HFI, at fair value
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Face Amount	$ 396,061
Carrying Value	$ 361,890	379,044
Loan Count | loan	7,405
Weighted Average Yield	8.40%
Weighted Average Life (Years)	4 years 6 months
Total Residential Mortgage Loans, HFS
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Face Amount	$ 75,872
Carrying Value	$ 66,670	78,877
Loan Count | loan	1,902
Weighted Average Yield	8.10%
Weighted Average Life (Years)	4 years 8 months 12 days
Acquired performing loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Face Amount	$ 56,469
Carrying Value	$ 51,011	57,038
Loan Count | loan	1,668
Weighted Average Yield	7.70%
Weighted Average Life (Years)	4 years 4 months 24 days
Acquired performing loans | Ginnie Mae
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
UPB	$ 245,800
Acquired non-performing loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Face Amount	19,403
Carrying Value	$ 15,659	21,839
Loan Count | loan	234
Weighted Average Yield	9.10%
Weighted Average Life (Years)	5 years 8 months 12 days
Acquired non-performing loans | Ginnie Mae
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
UPB	$ 281,600
Total Residential Mortgage Loans, HFS, at Fair Value
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Face Amount	4,274,620
Carrying Value	$ 4,307,571	2,461,865
Loan Count | loan	14,520
Weighted Average Yield	6.50%
Weighted Average Life (Years)	28 years 1 month 6 days
Acquired performing loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Face Amount	$ 422,680
Carrying Value	$ 408,421	400,603
Loan Count | loan	1,679
Weighted Average Yield	5.80%
Weighted Average Life (Years)	20 years 6 months
Acquired non-performing loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Face Amount	$ 294,104
Carrying Value	$ 270,879	204,950
Loan Count | loan	1,311
Weighted Average Yield	4.80%
Weighted Average Life (Years)	27 years 1 month 6 days
Originated loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Face Amount	$ 3,557,836
Carrying Value	$ 3,628,271	$ 1,856,312
Loan Count | loan	11,530
Weighted Average Yield	6.70%
Weighted Average Life (Years)	29 years 1 month 6 days