ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY OF FINANCING RECEIVABLES - Loans Which The Accrual Of Interest Has Been Discontinued (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans for which accrual of interest has been discounted	$ 11,415	$ 20,704
Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans for which accrual of interest has been discounted	701	372
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans for which accrual of interest has been discounted	0	0
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans for which accrual of interest has been discounted	5,643	15,760
Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans for which accrual of interest has been discounted	5,070	4,572
Consumer and Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans for which accrual of interest has been discounted	$ 1	$ 0