OTHER CONSOLIDATED BALANCE SHEET COMPONENTS (CURRENT) - Other Current Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Inventory, net	$ 72,340	$ 77,058
Restricted cash	109,450	18,778	$ 32,891
Processing costs receivable	236,044	228,914
Prepaid expenses	123,306	63,341
Accounts receivable, net	107,200	89,702
Other	137,807	118,189
Total	876,198	687,429
Loan Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment, net of allowance for loan losses	$ 90,051	$ 91,447