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INVESTMENT SECURITIES (Narrative) (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]          
Called investment securities     $ 18,151,000 $ 11,073,000  
Investment securities fair values with temporary impairments $ 66,300,000   $ 66,300,000    
Other than temporary impairment performing collateral will default or defer per annum     0.50%    
Recoveries ranging     9.00%    
Lag period on all default and deferrals     2 years    
Period of no prepayments for security     10 years    
Percentage of prepayments for remaining life of the security     1.00%    
OTTI charges related to credit 0 $ 0 $ 0 $ 0  
Purchases of available for sale investment securities 10,000,000.0   35,082,000    
Purchases of securities held to maturity 10,200,000   10,233,000    
Federal Home Loan Bank of Atlanta [Member]          
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]          
Securities pledged for collateral $ 128,900,000   $ 128,900,000   $ 165,700,000