ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY OF FINANCING RECEIVABLES - Loans Which The Accrual Of Interest Has Been Discontinued (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans for which accrual of interest has been discounted	$ 13,061	$ 11,415
Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans for which accrual of interest has been discounted	212	701
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans for which accrual of interest has been discounted	7,337	5,643
Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans for which accrual of interest has been discounted	$ 5,512	5,070
Consumer and Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans for which accrual of interest has been discounted		$ 1