DEBT - Disclosures (Details)			1 Months Ended		3 Months Ended				6 Months Ended	10 Months Ended	12 Months Ended	18 Months Ended
	Dec. 14, 2020	Nov. 30, 2019 USD ($) loan extension	Nov. 30, 2021 USD ($)	Jun. 30, 2019 USD ($)	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022 USD ($) extension	Mar. 31, 2021 USD ($)	Nov. 12, 2025	Oct. 31, 2021	Nov. 12, 2026	Nov. 12, 2026	Dec. 31, 2021 USD ($)
Funding agreements
Line of credit facility, maximum borrowing capacity							$ 1,453,480,000						$ 1,481,755,000
Number of non-recourse notes | loan		2
Outstanding balance							$ 912,857,000						1,041,157,000
Maximum
Funding agreements
Extension period of maturity date							12 months
Notes Payable
Funding agreements
Number of extension periods available for maturity date | extension		2
Extension period of maturity date		12 months
Interest rate margin (as a percent)							3.75%
Outstanding balance		$ 23,500,000					$ 22,800,000
Secured term loan
Funding agreements
Line of credit facility, maximum borrowing capacity							150,000,000						150,000,000
Outstanding balance							150,000,000						$ 150,000,000
Aggregate principal amount			$ 150,000,000				$ 150,000,000
Debt discount on initial draw down (as a percent)							4.60%	5.10%
Secured term loan | Forecast
Funding agreements
Interest rate during period									4.50%
Interest rate, increase (decrease)											0.125%
Interest rate, quarterly increase												0.25%
Secured term loan | LIBOR
Funding agreements
Interest rate margin (as a percent)			0.50%							5.00%
Interest rate, increase (decrease)							0.125%
Secured term loan | LIBOR | Forecast
Funding agreements
Interest rate, increase (decrease)					0.75%	0.375%
Wells Fargo Facility | Secured revolving funding facility
Funding agreements
Line of credit facility, maximum borrowing capacity							$ 450,000,000
Wells Fargo Facility | Secured revolving funding facility | Minimum | 30 day LIBOR
Funding agreements
Interest rate margin (as a percent)	1.50%
Wells Fargo Facility | Secured revolving funding facility | Maximum | 30 day LIBOR
Funding agreements
Interest rate margin (as a percent)	2.75%
Wells Fargo Facility | Revolving credit facility, optional commitment amount
Funding agreements
Line of credit facility, maximum borrowing capacity							$ 500,000,000
Number of extension periods available for maturity date | extension							3,000,000
Extension period of maturity date							12 months
Wells Fargo Facility | Revolving Credit Facility - Optional Funding Period
Funding agreements
Number of extension periods available for maturity date | extension							1
Extension period of maturity date							12 months
Citibank Facility | Secured revolving funding facility
Funding agreements
Line of credit facility, maximum borrowing capacity							$ 325,000,000
Number of extension periods available for maturity date | extension							2
Extension period of maturity date							12 months
Non-utilization fee on average available balance (basis points)							0.25%
Non-utilization fee							$ 11,000	$ 159,000
Facility used on average (at least) (as a percent)							75.00%
Citibank Facility | Secured revolving funding facility | Minimum | 30 day LIBOR
Funding agreements
Interest rate margin (as a percent)							1.50%
Citibank Facility | Secured revolving funding facility | Maximum | 30 day LIBOR
Funding agreements
Interest rate margin (as a percent)							2.10%
CNB Facility | CNB Facility
Funding agreements
Line of credit facility, maximum borrowing capacity							$ 75,000,000
Non-utilization fee							$ 70,000	27,000
CNB Facility | CNB Facility | LIBOR
Funding agreements
Interest rate margin (as a percent)							2.65%
CNB Facility | CNB Facility | One-month LIBOR
Funding agreements
Interest rate margin (as a percent)							1.00%
CNB Facility | CNB Facility | Federal funds rate
Funding agreements
Interest rate margin (as a percent)							0.50%
Non-utilization fee on average available balance (basis points)							0.375%
Facility used on average (at least) (as a percent)							75.00%
CNB Facility | CNB Facility | SOFR
Funding agreements
Interest rate margin (as a percent)							1.00%
CNB Facility | CNB Facility | Minimum | SOFR
Funding agreements
Interest rate margin (as a percent)							0.35%
CNB Facility | CNB Facility | Maximum | SOFR
Funding agreements
Interest rate margin (as a percent)							2.65%
CNB Facility | Revolving Credit Facility - Optional Funding Period
Funding agreements
Extension period of maturity date							12 months
MetLife Facility | Secured revolving funding facility
Funding agreements
Non-utilization fee on average available balance (basis points)							0.25%
Non-utilization threshold percentage (less than) (as a percent)							65.00%
MetLife Facility | CNB Facility
Funding agreements
Non-utilization fee							$ 60,000	$ 0
MetLife Facility | Revolving master repurchase facility
Funding agreements
Line of credit facility, maximum borrowing capacity							$ 180,000,000
Number of extension periods available for maturity date | extension							2
Extension period of maturity date							12 months
MetLife Facility | Revolving master repurchase facility | 30 day LIBOR
Funding agreements
Interest rate margin (as a percent)							2.50%
Morgan Stanley Facility | Revolving master repurchase facility
Funding agreements
Line of credit facility, maximum borrowing capacity							$ 250,000,000
Number of extension periods available for maturity date | extension							2
Extension period of maturity date							12 months
Morgan Stanley Facility | Revolving master repurchase facility | 30 day LIBOR
Funding agreements
Interest rate margin (as a percent)							2.25%
Morgan Stanley Facility | Revolving master repurchase facility | Minimum | 30 day LIBOR
Funding agreements
Interest rate margin (as a percent)							1.75%
NEW YORK | Notes Payable, Due June 10, 2024
Funding agreements
Interest rate margin (as a percent)							3.00%
NEW YORK | Notes Payable | Notes Payable, Due June 10, 2024
Funding agreements
Number of extension periods available for maturity date | extension							1
Extension period of maturity date							6 months
Interest expense from real estate owned				$ 28,300,000
SOUTH CAROLINA | Notes Payable
Funding agreements
Outstanding balance		$ 34,600,000