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DEPOSITS (Narrative) (Details)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2021
USD ($)
customer_relationship
Dec. 31, 2020
USD ($)
customer_relationship
Deposit Liability [Line Items]    
Time Deposits 250000 Or More $ 63,200 $ 64,300
Total Deposits $ 2,004,607 $ 1,745,602
Customer Concentration Risk | Sales Revenue, Net | Customer Deposits    
Deposit Liability [Line Items]    
Concentration risk, percentage 2.00% 2.00%
Concentration risk, customer with deposits exceeding threshold | customer_relationship 3 2
Total Deposits $ 383,400 $ 238,800