FAIR VALUE OF FINANCIAL INSTRUMENTS - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		27 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for sale	$ 357,115		$ 357,115	$ 517,940
Loans held for sale forgiven	299,700		1,000,000
Revenue	3,960,645	$ 5,057,270
Paycheck Protection Program, CARES Act Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for sale	105,600		105,600
Loans issued	1,500,000		1,500,000
Loans issued and sold to investor	399,100		$ 399,100
Revenue	$ 51,500