LOANS - Composition of TDRs by Accrual and Nonaccrual Status (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Accounts Notes And Loans Receivable [Line Items]
Troubled Debt Restructurings, Nonaccrual	$ 16,187	$ 20,628
Commercial and Industrial Loans
Accounts Notes And Loans Receivable [Line Items]
Troubled Debt Restructurings, Nonaccrual	3,817	5,137
Principal Reduction And Extended Maturity
Accounts Notes And Loans Receivable [Line Items]
Troubled Debt Restructurings, Accrual	3,244	3,348
Troubled Debt Restructurings, Nonaccrual	3,408	4,109
Troubled Debt Restructurings, Total	6,652	7,457
Principal Reduction And Extended Maturity | Residential Loans
Accounts Notes And Loans Receivable [Line Items]
Troubled Debt Restructurings, Accrual	1,200	1,200
Troubled Debt Restructurings, Total	1,200	1,200
Principal Reduction And Extended Maturity | Commercial Real Estate Loans
Accounts Notes And Loans Receivable [Line Items]
Troubled Debt Restructurings, Accrual	1,064	1,107
Troubled Debt Restructurings, Nonaccrual	1,228	1,277
Troubled Debt Restructurings, Total	2,292	2,384
Principal Reduction And Extended Maturity | Commercial and Industrial Loans
Accounts Notes And Loans Receivable [Line Items]
Troubled Debt Restructurings, Accrual	980	1,041
Troubled Debt Restructurings, Nonaccrual	2,180	2,832
Troubled Debt Restructurings, Total	$ 3,160	$ 3,873