TRANSACTIONS WITH RELATED PARTIES (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Related Party Transaction [Line Items]
Related party receivables	$ 30,783,000		$ 30,783,000		$ 34,181,000
Total revenue from fees, net	249,283,000	$ 201,447,000	728,881,000	$ 562,386,000
Variable Interest Entity, Not Primary Beneficiary
Related Party Transaction [Line Items]
Loan principal purchased	14,500,000	0	34,000,000	0
Loss on loans purchased	12,800,000		31,200,000
Related Party
Related Party Transaction [Line Items]
Related party receivables	30,783,000		30,783,000		33,739,000
Total revenue from fees, net	174,177,000	157,590,000	528,021,000	459,581,000
Related Party | Securitization Vehicles
Related Party Transaction [Line Items]
Related party receivables	78,900,000		78,900,000		78,400,000
Total revenue from fees, net	154,300,000	149,000,000	474,100,000	418,400,000
Related Party | Other Financing Vehicles
Related Party Transaction [Line Items]
Related party receivables	7,500,000		7,500,000		6,300,000
Total revenue from fees, net	19,900,000	$ 8,600,000	53,900,000	$ 41,200,000
Assets | Related Party
Related Party Transaction [Line Items]
Related party receivables	86,400,000		86,400,000		84,800,000
Prepaid Expense And Other Assets, Noncurrent | Related Party
Related Party Transaction [Line Items]
Related party receivables	$ 15,700,000		$ 15,700,000		$ 7,900,000