ALLOWANCE FOR CREDIT LOSSES AND CREDIT QUALITY - Loans By Class Modified As Troubled Debt Restructuring (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($) loan
Financing Receivable, Modifications
Pre-Modification Outstanding Recorded Investment | $	$ 788
Post-Modification Outstanding Recorded Investment | $	$ 122
All Modifications [Member]
Financing Receivable, Modifications
Number of Loans | loan	1
Modified Repayment Terms
Financing Receivable, Modifications
Number of Loans | loan	1
Extension period for modified repayment terms	0 months
Commercial and industrial loans | Non-working capital loans
Financing Receivable, Modifications
Pre-Modification Outstanding Recorded Investment | $	$ 788
Post-Modification Outstanding Recorded Investment | $	$ 122
Commercial and industrial loans | Non-working capital loans | All Modifications [Member]
Financing Receivable, Modifications
Number of Loans | loan	1
Commercial and industrial loans | Non-working capital loans | Modified Repayment Terms
Financing Receivable, Modifications
Number of Loans | loan	1
Extension period for modified repayment terms	0 months