SIGNIFICANT ACCOUNTING POLICIES - Schedule of Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Debt Instrument [Line Items]
Interest expense	$ 12,013	$ 12,139
Secured funding agreements
Debt Instrument [Line Items]
Interest expense	5,127	3,824
Notes Payable
Debt Instrument [Line Items]
Interest expense	453	1,194
Securitization debt
Debt Instrument [Line Items]
Interest expense	4,351	4,307
Secured term loan
Debt Instrument [Line Items]
Interest expense	1,732	1,341
Secured borrowings
Debt Instrument [Line Items]
Interest expense	292	1,431
Other
Debt Instrument [Line Items]
Interest expense	$ 58	$ 42