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REVENUE FROM CONTRACTS WITH CUSTOMERS (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Disaggregation of Revenue [Line Items]      
Receivables from customers $ 640 $ 682  
Other service charges 1,392 673 $ 591
Mortgage banking activities 2,663 2,919 3,412
Income from life insurance 1,463 1,109 1,099
Other income 320 190 345
Investment securities gains 1,006 1,190 1,420
Total noninterest income 21,854 20,387 19,739
Service charges on deposits      
Disaggregation of Revenue [Line Items]      
Revenue from contract with customer 3,578 3,392 3,285
Trust and investment management income      
Disaggregation of Revenue [Line Items]      
Revenue from contract with customer 6,576 6,400 5,091
Brokerage income      
Disaggregation of Revenue [Line Items]      
Revenue from contract with customer 2,035 1,896 1,933
Merchant and bankcard fees (interchange income)      
Disaggregation of Revenue [Line Items]      
Revenue from contract with customer 2,821 2,618 2,563
Noninterest income      
Disaggregation of Revenue [Line Items]      
Revenue from contract with customer $ 15,010 $ 14,306 $ 12,872