BORROWINGS - Outstanding Borrowings (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 11, 2024	Sep. 16, 2024	May 30, 2024	Dec. 31, 2023	Aug. 31, 2023	Jan. 23, 2023	Dec. 31, 2021	May 20, 2021	Feb. 16, 2021	Jan. 31, 2021	Oct. 31, 2019	Jul. 25, 2019	Nov. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Weighted Avg Interest Rate	7.22%				7.04%
Webster Note - MWI \| Line of Credit
Debt Instrument [Line Items]
Principal balance	$ 32,894				$ 36,881
Unamortized deferred financing costs	(206)				(253)
Net carrying amount	$ 32,688				$ 36,628
Weighted Avg Interest Rate	7.30%				7.94%
Capital One Facilities \| Line of Credit
Debt Instrument [Line Items]
Principal balance	$ 21,300				$ 16,300
Unamortized deferred financing costs	(108)				(220)
Net carrying amount	21,192				16,080
Deutsche Bank Line of Credit \| Line of Credit
Debt Instrument [Line Items]
Principal balance	54,800				6,900
Unamortized deferred financing costs	(764)				(101)
Net carrying amount	$ 54,036				$ 6,799
Weighted Avg Interest Rate	7.57%				10.04%
One Florida line of credit - SP3 \| Line of Credit
Debt Instrument [Line Items]
Principal balance	$ 23,075				$ 375
Unamortized deferred financing costs	(64)				(118)
Net carrying amount	$ 23,011				$ 257
Weighted Avg Interest Rate	8.50%				9.50%
2024 Notes \| Medium-term Notes
Debt Instrument [Line Items]
Principal balance	$ 0				$ 38,250				$ 10,000	$ 5,000			$ 55,000
Unamortized deferred financing costs	0				(126)
Net carrying amount	$ 0				$ 38,124
Weighted Avg Interest Rate	5.75%				5.75%								5.75%
2025 5.00% Notes \| Medium-term Notes
Debt Instrument [Line Items]
Principal balance	$ 30,000				$ 30,000
Unamortized deferred financing costs	(87)				(437)
Net carrying amount	$ 29,913				$ 29,563
Weighted Avg Interest Rate	5.00%				5.00%
2025 8.125% Notes \| Medium-term Notes
Debt Instrument [Line Items]
Principal balance					$ 50,000		$ 50,000
Unamortized deferred financing costs					(567)
Net carrying amount					$ 49,433
Weighted Avg Interest Rate	8.125%	8.125%			8.125%		8.125%
2026 Notes \| Medium-term Notes
Debt Instrument [Line Items]
Principal balance	$ 115,000				$ 115,000						$ 115,000
Unamortized deferred financing costs	(718)				(1,436)
Net carrying amount	$ 114,282				$ 113,564
Weighted Avg Interest Rate	5.50%				5.50%						5.50%
2027 Notes \| Medium-term Notes
Debt Instrument [Line Items]
Principal balance	$ 50,000
Unamortized deferred financing costs	(56)
Net carrying amount	$ 49,944
Weighted Avg Interest Rate	8.125%
2028 Notes (8.00%) \| Medium-term Notes
Debt Instrument [Line Items]
Principal balance	$ 40,000				$ 40,000	$ 40,000
Unamortized deferred financing costs	(1,274)				(1,622)
Net carrying amount	$ 38,726				$ 38,378
Weighted Avg Interest Rate	8.00%				8.00%	8.00%
2029 8.50% Notes \| Medium-term Notes
Debt Instrument [Line Items]
Principal balance	$ 71,875			$ 71,900
Unamortized deferred financing costs	(2,253)
Net carrying amount	$ 69,622
Weighted Avg Interest Rate	8.50%			8.50%	8.50%
2029 8.625% Notes \| Medium-term Notes
Debt Instrument [Line Items]
Principal balance	$ 75,000		$ 75,000
Unamortized deferred financing costs	(2,338)
Net carrying amount	$ 72,662
Weighted Avg Interest Rate	8.625%		8.625%		8.625%
Securitization Trusts \| Secured Debt
Debt Instrument [Line Items]
Principal balance	$ 189,231				$ 296,223			$ 103,400				$ 118,900		$ 108,600	$ 75,400
Unamortized deferred financing costs	(2,596)				(4,111)
Net carrying amount	$ 186,635				$ 292,112
Weighted Avg Interest Rate	7.32%				7.84%