ALLOWANCE FOR CREDIT LOSSES AND CREDIT QUALITY - Amortized Cost Basis of Each Class of Financing Receivables (Details) - Commercial and industrial loans - Non-working capital loans - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2023
Financing Receivable, Allowance for Credit Loss [Line Items]
Percentage of loans receivable	0.20%	0.20%
Principal Forgiveness
Financing Receivable, Allowance for Credit Loss [Line Items]
Combination Principal Forgiveness, Term Extension and Interest Rate Reduction		$ 1,600
Percentage of loans receivable	0.20%	0.20%