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DEPOSITS (Narrative) (Details)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2020
USD ($)
Customer
Dec. 31, 2019
USD ($)
Customer
Time Deposits [Line Items]    
Time deposits $250,000 or more $ 67,100 $ 86,600
Total Deposits $ 1,779,606 $ 1,511,837
Customer Concentration Risk | Sales Revenue, Net    
Time Deposits [Line Items]    
Concentration risk, percentage 2.00% 2.00%
Concentration risk, customer with deposits exceeding threshold | Customer 2 2
Concentration risk percentage of total deposits 17.90% 19.60%
Total Deposits $ 317,900 $ 297,100