RESIDENTIAL TRANSITION LOANS - Summary of Residential Transition Loans (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2025 USD ($) loan	Dec. 31, 2024 USD ($) loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value	$ 451,841	$ 425,366
Residential Transitional Lending
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value	$ 3,273,750	$ 3,140,267
% of Portfolio	100.00%	100.00%
Loan Count | loan	1,484	1,535
% of Portfolio	100.00%	100.00%
Weighted Average Yield	10.60%	10.70%
Weighted Average Original Life (Months)	20 years 4 months 24 days	20 years 4 months 24 days
Residential Transitional Lending | Consolidated Entity, Excluding Consolidated VIE
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value	$ 2,335,218	$ 2,178,075
Residential Transitional Lending | Variable Interest Entity, Primary Beneficiary
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value	938,532	962,192
Residential Transitional Lending | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value	$ 1,421,552	$ 1,427,213
% of Portfolio	43.40%	45.40%
Loan Count | loan	477	490
% of Portfolio	32.10%	31.90%
Weighted Average Yield	11.40%	11.40%
Weighted Average Original Life (Months)	19 years 9 months 18 days	20 years
Weighted Average Committed Loan Balance to Value, LTC	72.00%	72.70%
Weighted Average Committed Loan Balance to Value, LTARV	62.00%	62.20%
Residential Transitional Lending | Construction | Consolidated Entity, Excluding Consolidated VIE
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value	$ 1,003,657	$ 935,142
Residential Transitional Lending | Construction | Variable Interest Entity, Primary Beneficiary
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value	417,895	492,071
Residential Transitional Lending | Bridge
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value	$ 1,446,029	$ 1,336,389
% of Portfolio	44.20%	42.60%
Loan Count | loan	570	600
% of Portfolio	38.50%	39.10%
Weighted Average Yield	10.00%	10.00%
Weighted Average Original Life (Months)	23 years 7 months 6 days	23 years 10 months 24 days
Weighted Average Committed Loan Balance to Value	66.60%	66.60%
Residential Transitional Lending | Bridge | Consolidated Entity, Excluding Consolidated VIE
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value	$ 1,063,102	$ 972,443
Residential Transitional Lending | Bridge | Variable Interest Entity, Primary Beneficiary
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value	382,927	363,946
Residential Transitional Lending | Renovation
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value	$ 406,169	$ 376,665
% of Portfolio	12.40%	12.00%
Loan Count | loan	437	445
% of Portfolio	29.40%	29.00%
Weighted Average Yield	10.30%	10.50%
Weighted Average Original Life (Months)	14 years 9 months 18 days	12 years 9 months 18 days
Weighted Average Committed Loan Balance to Value, LTC	83.40%	82.80%
Weighted Average Committed Loan Balance to Value, LTARV	68.40%	68.20%
Residential Transitional Lending | Renovation | Consolidated Entity, Excluding Consolidated VIE
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value	$ 268,459	$ 270,490
Residential Transitional Lending | Renovation | Variable Interest Entity, Primary Beneficiary
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value	$ 137,710	$ 106,175