SIGNIFICANT ACCOUNTING POLICIES - Schedule of Interest Expense (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Debt Instrument [Line Items]
Interest expense		$ 13,475	$ 11,092	$ 25,488	$ 23,231
Secured funding agreements
Debt Instrument [Line Items]
Interest expense		6,342	3,196	11,469	7,019
Notes Payable
Debt Instrument [Line Items]
Interest expense		531	279	984	1,473
Securitization debt
Debt Instrument [Line Items]
Interest expense		5,591	5,136	9,942	9,444
Secured term loan
Debt Instrument [Line Items]
Interest expense		1,752	797	3,484	2,138
Secured borrowings
Debt Instrument [Line Items]
Interest expense		296	1,450	588	2,881
Other
Debt Instrument [Line Items]
Interest expense		$ (1,037)	$ 234	$ (979)	$ 276
Notes Payable, Due June 10, 2024 | Notes Payable | NEW YORK
Debt Instrument [Line Items]
Interest expense from real estate owned	$ 28,300