ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY - Loans By Class Modified As Troubled Debt Restructuring (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2020 USD ($) loan	Sep. 30, 2019 USD ($) loan
Financing Receivable, Modifications
Pre-Modification Outstanding Recorded Investment | $	$ 6,066	$ 35
Post-Modification Outstanding Recorded Investment | $	$ 5,533	$ 35
Extension period for modified repayment terms	0 months	0 months
Modified Repayment Terms
Financing Receivable, Modifications
Number of Loans | loan	4	1
All Modifications [Member]
Financing Receivable, Modifications
Number of Loans | loan	4	1
Commercial and Industrial Loans [Member] | Working Capital Lines of Credit Loans [Member]
Financing Receivable, Modifications
Pre-Modification Outstanding Recorded Investment | $	$ 250	$ 35
Post-Modification Outstanding Recorded Investment | $	$ 315	$ 35
Extension period for modified repayment terms	0 months	0 months
Commercial and Industrial Loans [Member] | Working Capital Lines of Credit Loans [Member] | Modified Repayment Terms
Financing Receivable, Modifications
Number of Loans | loan	1	1
Commercial and Industrial Loans [Member] | Working Capital Lines of Credit Loans [Member] | All Modifications [Member]
Financing Receivable, Modifications
Number of Loans | loan	1	1
Commercial and Industrial Loans [Member] | Non-working Capital Loans [Member]
Financing Receivable, Modifications
Pre-Modification Outstanding Recorded Investment | $	$ 4,288
Post-Modification Outstanding Recorded Investment | $	$ 3,691
Extension period for modified repayment terms	0 months
Commercial and Industrial Loans [Member] | Non-working Capital Loans [Member] | Modified Repayment Terms
Financing Receivable, Modifications
Number of Loans | loan	2
Commercial and Industrial Loans [Member] | Non-working Capital Loans [Member] | All Modifications [Member]
Financing Receivable, Modifications
Number of Loans | loan	2
Commercial Real Estate and Multi-family Residential Loans [Member] | Owner Occupied Loans [Member]
Financing Receivable, Modifications
Pre-Modification Outstanding Recorded Investment | $	$ 1,528
Post-Modification Outstanding Recorded Investment | $	$ 1,527
Extension period for modified repayment terms	0 months
Commercial Real Estate and Multi-family Residential Loans [Member] | Owner Occupied Loans [Member] | Modified Repayment Terms
Financing Receivable, Modifications
Number of Loans | loan	1
Commercial Real Estate and Multi-family Residential Loans [Member] | Owner Occupied Loans [Member] | All Modifications [Member]
Financing Receivable, Modifications
Number of Loans | loan	1