RESIDENTIAL MORTGAGE LOANS - Residential Mortgage Loans Outstanding by Loan Type, Excluding REO (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2025 USD ($) loan	Mar. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Face Amount		$ 35,000
Weighted Average Life (Years)	3 years 7 months 6 days
Investments of consolidated CFEs
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Face Amount	$ 2,769,184
Carrying Value	$ 2,637,931		$ 2,791,027
Loan Count | loan	7,299
Weighted Average Yield	5.70%
Weighted Average Life (Years)	25 years 3 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	$ 371,253
Carrying Value	$ 343,333		361,890
Loan Count | loan	7,017
Weighted Average Yield	7.90%
Weighted Average Life (Years)	4 years 8 months 12 days
Total Residential Mortgage Loans, HFS
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Face Amount	$ 68,525
Carrying Value	$ 60,966		66,670
Loan Count | loan	1,769
Weighted Average Yield	7.70%
Weighted Average Life (Years)	4 years 3 months 18 days
Acquired performing loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Face Amount	$ 52,362
Carrying Value	$ 47,792		51,011
Loan Count | loan	1,575
Weighted Average Yield	6.80%
Weighted Average Life (Years)	4 years 3 months 18 days
Acquired performing loans | Ginnie Mae
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
UPB	$ 162,300
Acquired non-performing loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Face Amount	16,163
Carrying Value	$ 13,174		15,659
Loan Count | loan	194
Weighted Average Yield	10.50%
Weighted Average Life (Years)	4 years 2 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	$ 235,100
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	4,049,979
Carrying Value	$ 4,126,335		4,307,571
Loan Count | loan	14,107
Weighted Average Yield	6.60%
Weighted Average Life (Years)	25 years 9 months 18 days
Acquired performing loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Face Amount	$ 682,059
Carrying Value	$ 682,947		408,421
Loan Count | loan	2,075
Weighted Average Yield	6.20%
Weighted Average Life (Years)	10 years 8 months 12 days
Acquired non-performing loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Face Amount	$ 246,049
Carrying Value	$ 222,535		270,879
Loan Count | loan	1,121
Weighted Average Yield	5.10%
Weighted Average Life (Years)	27 years 8 months 12 days
Originated loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Outstanding Face Amount	$ 3,121,871
Carrying Value	$ 3,220,853		$ 3,628,271
Loan Count | loan	10,911
Weighted Average Yield	6.80%
Weighted Average Life (Years)	29 years